OPTISCHE FASER MIT NIEDRIGEN POLARISATIONSMODENDISPERSION SOWIE DÄMPFUNG UND IHRE HERSTELUNGSVERFAHREN

Optische Wellenleiterfaser mit sehr dünner äusserer TiO2-SiO2-Überzugsschicht und Verfahren zu ihrer Herstellung

Optische Einmodennachrichtenfaser und Verfahren zur Herstellung der Faser

Novel radiation detector

Optical fibre and optical fibre device

OPTICLE FIBRE MANUFACTURE

PROCEDURE FOR MANUFACTURING COVERS OF OPTICAL GLASS FIBERS FOR THE USE AS MONO MODE TRANSVERSE ELECTROMAGNETIC WAVE

OPTICAL FIBER WITH LOW POLARIZATION INTERMODE DISPERSION AS WELL AS ABSORPTION AND YOUR HERSTELUNGSVERFAHREN

OPTICAL SYSTEM AND PROCEDURE WITH SMALL LOSSES AND NONLINEAR EFFECTS

Helical fiber amplifier

Moisture-resistant nano-particle material and its applications

Optical waveguide fiber with very thin titania-silica outer cladding layer and method for manufacturing same

Partially detached core optical waveguide

Optical waveguides and method of fabrication thereof

OPTICAL SYSTEM AND METHOD HAVING LOW LOSS AND NON-LINEAR EFFECTS

An apparatus and method for transmitting an optical signal. The invention is directed to a transmission line having first (16) and second (18) spans of single mode fiber. The fiber of the first span has a negative dispersion with an absolute value of between about 2.5 ps/nm/km and 10 ps/nm/km at the operating wavelength. The second span (18) is connected to the first span (16) and has a positive dispersion at the operating wavelength. The positive dispersion of the second span compensates for the negative dispersion of the first span such that the cumulative dispersion across the first and second spans is approximately zero. The increased dispersion of the first span coincides with characteristics to lower non-linear effects, permits a longer length of the second span, and helps lower attenuation in the transmission line.

METHOD OF MAKING GLASS OPTICAL WAVEGUIDE

METHOD OF MAKING GLASS OPTICAL WAVEGUIDE A method of forming an optical waveguide by forming a first layer of glass having a predetermined refractive index on the outside peripheral wall surface of a substantially cylindrical mandrel. Thereafter, a second layer of glass is applied to the surface of the first layer, the second layer having a refractive index less than that of the first layer. The mandrel is removed from the assembly and the resultant cylindrical, hollow assembly is heated and drawn to reduce the cross-sectional area thereof, thereby forming an intermediate fiber. At least a portion of the intermediate fiber is disposed within a hollow glass cylinder having a refractive index similar to that of the second layer of glass of the intermediate fiber. The resultant composite structure is heated and drawn to reduce the cross-sectional area thereof and to collapse the inner, first layer of glass and to cause the inner surface of the glass cylinder to collapse upon the outer surface ...

OPTICAL FIBER FOR METROPOLITAN AND ACCESS NETWORK SYSTEMS

An optical transmission fiber for use in a metropolitan or access network is disclosed. The transmission line includes a fiber being single mode at a first operating wavelength of around 1310 nm and a second operating wavelength of around 1550 nm. The dispersion of the fiber is negative at one of the first and second operating wavelengths and positive at the other of the first and second operating wavelengths, with an absolute value of between about 5 ps/nm/km and 15 ps/nm/km. The fiber also has a zero dispersion wavelength that is located between the first and second operating wavelengths, and an effective area at a wavelength around 1550 nm greater than about 60 .mu.m2. The cabled fiber has a cutoff wavelength less than about 1300 nm. The fiber allows wavelength division multiplexing (WDM) operation in both the bands (1310 nm and 1550 nm) by reducing nonlinear effects such as four-wave mixing (FWM).

OPTICAL WAVEGUIDE FIBER WITH TITANIA-SILICA OUTER CLADDING AND METHOD OF MANUFACTURING

An optical waveguide fiber with a fatigue resistant TiO2-SiO2 outer cladding including a cylindrical outermost layer with TiO2 concentration greater than 10.5 wt.% and thickness less than 3 .mu.m. The fiber may include a two layer outer cladding with higher TiO2 concentration in the outer layer. The outer cladding may ionclude a plurality of inhomogeneities dispersed in a TiO2-SiO2 matrix. A method of making an optical waveguide fiber with a fatigue resistant TiO2-SiO2 outer cladding, and a substantially glass blank for drawing into such fiber, wherein a glass soot TiO2-SiO2 outermost layer, with an initial TiO2 concentration greater than 10.5 wt.%, is deposited on a preform, and the preform is exposed to an atmosphere of chlorine at a high temperature, and the resulting TiO2 concentration in the outermost layer of the TiO2-SiO2 outer cladding of the substantially glass blank is less than the initial TiO2 concentration. In the glass blank form, the outermost layer includes a substantial ...

PROCEDURE FOR THE PRODUCTION OF A MULTILEVEL BLANK FOR COURSE CELEBRATIONS OPTICAL FIBERS.

Devices of transmission of radiant energy

PROCESS FOR the REALIZATION Of an OPTICAL WAVEGUIDE OUT OF GLASS

Procédé de fabrication de préformes et de fibres optiques de haute résistance.

L'INVENTION CONCERNE LA FABRICATION DE PREFORMES MULTICOUCHES DONT L'ETIRAGE PERMET LA PRODUCTION DE FIBRES OPTIQUES DE GRANDE RESISTANCE A LA TRACTION, CETTE RESISTANCE ETANT ACCRUE PAR UNE MINCE COUCHE EXTERNE QUI EXERCE UNE COMPRESSION ELEVEE SUR LA GAINE OU UNE COUCHE SUPPLEMENTAIRE DE LA FIBRE. LES DIFFERENTES COUCHES DE VERRE NECESSAIRES, AU MINIMUM LA COUCHE DE COMPRESSION 12, LA GAINE 11 ET LE COEUR 10 SONT OBTENUES DE FACON CLASSIQUE PAR DEPOTS SUCCESSIFS DES MELANGES GAZEUX APPROPRIES A L'INTERIEUR D'UN SUBSTRAT TUBULAIRE 13, LE VERRE CHOISI POUR LE SUBSTRAT ETANT CARACTERISE PAR UNE ATTAQUE CHIMIQUE PLUS RAPIDE QUE LE VERRE DE LA COUCHE DE COMPRESSION. APRES CONTRACTION DE LA PREFORME EN BARREAU CYLINDRIQUE PLEIN, LE SUBSTRAT 13 PEUT AINSI ETRE ELIMINE PAR ATTAQUE CHIMIQUE SANS ENDOMMAGER LA COUCHE DE COMPRESSION. APPLICATION A LA FABRICATION DE FIBRES OPTIQUES POUR TELECOMMUNICATIONS.

DEVICE OF CONVERSION OF the TRANSVERSE SPACE PROFILE Of INTENSITY Of a Beam of light, USING a Fiberoptic MICROSTRUCTUREE PREFERABLY

Dispositif de conversion du profil spatial transverse d'intensité d'un faisceau lumineux, utilisant de préférence une fibre optique microstructurée. Dans ce dispositif, les dimensions transverses de la fibre (10) varient longitudinalement et ses deux extrémités (12, 14) ont des paramètres opto-géométriques adaptés pour qu'à la longueur d'onde du faisceau, la fibre ait un mode fondamental ayant deux profils différents au niveau des deux extrémités. Ainsi, en injectant le faisceau (24) avec l'un des profils par l'une des deux extrémités, il en ressort par l'autre extrémité avec l'autre profil.

MANUFACTORING PROCESS OF PREFORMS AND FIBEROPTICS OF HIGH STRENGTH

METHOD FOR MANUFACTURE CONTINUES FIBEROPTICS

METHODE POUR LA FABRICATION CONTINUE DE FIBRES OPTIQUES

La présente invention concerne la fabrication des fibres optiques. Un mandrin de graphite recouvert de platine et dont une des extrémités est conique est chauffé par induction au moyen de bobines 17 et 17' jusqu'à une température entraînant la fusion des différents matériaux déposés par l'intermédiaire de becs 12 à 15. La fibre est obtenue par étirage de l'ensemble desdits matériaux au niveau de l'extremite conique du mandrin. L'invention trouve, par exemple, une application dans la fabrication de fibres à gradient ou à saut d'indice.

A LOW ATTENUATION OPTICAL FIBER AND METHOD FOR PRODUCING IT IN MCVD

본 발명은 광전도 코어부와 클래드부를 포함하는 광섬유에 관한 것으로서, 특히 모드필드경(MFD: Mode Field Diameter) 영역에서 수산기 농도가 현저히 낮은 저손실 광섬유에 관한 것이다. The present invention relates to an optical fiber including a photoconductive core portion and a cladding portion, and more particularly, to a low loss optical fiber having a significantly low hydroxyl concentration in a mode field diameter (MFD) region. 본 발명은 광전도를 위해 중심축에 위치되는 코어부, 이 코어부를 순차적으로 피복하는 탈수 클래딩부 및 베이스 클래딩부를 구비하고, 상기 탈수 클래딩부 및 베이스 클래딩부는 그 굴절율이 실질적으로 동일하고, 상기 코어부의 굴절률은 상기 탈수 클래딩부 및 베이스 클래딩부의 굴절률 보다 크며, 상기 탈수 클래딩부의 수산기 농도가 상기 베이스 클래딩부의 수산기 농도 보다 상대적으로 낮고, 상기 코어부 및 상기 탈수 클래딩부로 이루어지는 영역이 광섬유의 MFD(Mode Field Diameter)영역을 포함하고, 상기 광섬유의 MFD영역에서의 수산기(OH) 농도가 0.8ppb 이하인 것을 특징으로 하는 단일모드 광섬유에 관한 것이다. The present invention includes a core portion positioned on a central axis for photoconductivity, a dewatering cladding portion and a base cladding portion sequentially covering the core portion, wherein the dewatering cladding portion and the base cladding portion have substantially the same refractive indices, and the core The negative refractive index is greater than the refractive index of the dehydrating cladding portion and the base cladding portion, the hydroxyl concentration of the dehydrating cladding portion is relatively lower than the hydroxyl concentration of the base cladding portion, and the region consisting of the core portion and the dehydrating cladding portion is an MFD (Mode Field) And a hydroxyl (OH) concentration in the MFD region of the optical fiber is 0.8 ppb or less. 광섬유, 탈수, MFD Fiber optic, dewatering, MFD

Low Attenuation Optical Fiber and Its Producing Method in Mcvd

Disclosed is a low-attenuation single-mode optical fiber having a photoconductive core and a clad, which shows very low OH concentration in MFD (Mode Field Diameter) region. The optical fiber includes a core positioned at its center for photoconduction, and a dehydrated clad and a base clad which are coated on the clad in order. The dehydrated clad has a substantially identical refractive index to the base clad. A refractive index of the core is greater than those of the dehydrated clad and the base clad. The dehydrated clad has a relatively lower OH concentration than the base clad. The region composed of the core and the dehydrated clad has an MFD region at which OH concentration is less than 0.8 ppb.

Graded-index multimode fiber and manufacturing method therefor

A graded-index multimode fiber includes a core made of silica glass, the core having a central region and an outer peripheral region, and a cladding which is provided at an outer periphery of the core. The central region contains one of germanium and phosphorus, and the outer peripheral region contains fluorine.

Optical fiber system using tapered fiber devices

In accordance with the invention, an optical fiber system is provided with a tapered fiber device for filtering, wavelength shift detecting, or switching. Specifically, applicant has discovered that a multiclad single mode optical fiber with a fundamental mode cutoff can be tapered to form a compact component useful in optical fiber systems, e.g. a filter in telecommunications systems, a wavelength shift detector in sensing systems, or a switch in any optical system.

Double-clad optical fiber with improved inner cladding geometry

A double-clad optical fiber has an inner cladding that has a torsional stress induced within it during manufacture. By rotating the fiber preform before curing of the inner cladding layer, a physical stress may be permanently imparted to the inner cladding that interacts with pump energy within the inner cladding layer to encourage mode mixing. As the cladding modes are disturbed by the stresses in the fiber, they are redirected so that the light in them intersects the core.

Optical fiber for metropolitan and access network systems

An optical transmission fiber for use in a metropolitan or access network is disclosed. The transmission line includes a fiber being single mode at a first operating wavelength of around 1310 nm and a second operating wavelength of around 1550 nm. The dispersion of the fiber is negative at one of the first and second wavelengths and positive at the other wavelength, with an absolute value of between about 5 and 15 ps/nm/km. The fiber also has a zero dispersion wavelength that is located between the first and second operating wavelengths, and an effective area at a wavelength around 1550 nm greater than about 60 mum2. The cabled fiber has a cutoff wavelength less than about 1300 nm. The fiber allows wavelength division multiplexing (WDM) operation in both the bands (1310 nm and 1550 nm) by reducing nonlinear effects such as four-wave mixing (FWM).

Plastic glass optical fiber

A plastic glass optical fiber includes a glass core (diameter a1, relative refractive index difference 1, and refractive index n1), a polymer core (diameter a2, relative refractive index difference 2, and refractive index n2), and a polymer cladding (refractive index n3), in which the diameter a1 of the glass core is within a range of 110 m to 200 m, a parameter X (X is a22/a12) is within a range of 1.15X2.9, a parameter Y (Y is 2/1) is within a range of 0.25Y0.84X0.68 (when 1.15X2) or 0.48X0.71Y(2/9)X+13/9 (when 2X2.9), a parameter ZR (ZR is Z2core/Z1core; Z2core=a22/4×(n12n32) and Z1core=a12/4×(n12n22)) is within a range of 1.25ZR4.

APPARATUS AND METHOD FOR LASER MACHINING

A laser machining device includes a laser oscillator, a laser machining head, an optical fiber transmitting the laser beam oscillated by the laser oscillator to the laser machining head, and an assist gas supply supplying an assist gas of oxygen to the laser machining head. The optical fiber includes a remover removing a clad transmitting beam or reducer for reducing the beam. The laser beam leaked from the core of the optical fiber into the clad is absorbed by a beam absorber at the remover. The structure ensures a high quality surface with no irregularity on the metal surface cut by the laser beam projected from the machining head.

FIBER FOR ENHANCED ENERGY ABSORPTION

Fibers including fiber lasers and fiber amplifiers and systems containing such fibers are disclosed. The fibers included can comprise a core (610), a first cladding (210) around the core (610) with the first cladding (210) having an outer perimeter with at least two substantially flat sides and a second cladding around the first cladding (210) with the second (cladding) having a non-oval shaped perimeter.

OPTICAL FIBER FOR RADIATION RESISTANCE

PURPOSE: To prevent deterioration in characteristic by forming a clad layer of two layers, i.e. the 1st and the 2nd layers and setting a specific condition among the external diameter of a core and the 1st and the 2nd clad layers. CONSTITUTION: The clad layer consists of the 1st clad layer formed of quartz glass containing fluorine and the 2nd outside clad layer formed of quartz glass containing phosphorus; and b/a>4 and b/c<1, where 2a is the external diameter of the core, 2b is the external diameter of the 1st clad layer, and 2c is the external diameter of the 2nd clad layer. An optical fiber for radiation resistance has the two-layer structure consisting of a core 1 formed of pure quartz glass and a clad layer 2; and the 1st inside clad layer 21 is formed of quartz glass containing fluorine and the 2nd outside clad layer 22 is formed quartz glass containing phosphorus. Consequently, a loss increase in radiation irradiation and loss recovery characteristics after the irradiation are both ...

ОДНОМОДОВОЕ ОПТИЧЕСКОЕ ВОЛОКНО И СПОСОБ ИЗГОТОВЛЕНИЯ ОДНОМОДОВОГО ОПТИЧЕСКОГО ВОЛОКНА

FIELD: optical engineering. SUBSTANCE: single-mode optical fiber has light-conducting part (4) of core, internal part (3) of envelope which surrounds part 4 of core and area of coating which surrounds the internal part (3) of envelope. Refractivity factor of core part 4 excesses refractivity factors of area 1 and 3 of envelope which are almost equal. Internal part (3) of envelope is made of SiO 2 which includes doping fluoride in amount of 0,1-8,5 mass percent which results to compressing axial force of part 4 of core along its whole cross-section. Internal part 3 of envelope is additionally provided with doping additives to increase refraction and to get refractivity factor being practically equal to refractivity factor of area 1 of coating. Tube base is made of silicon dioxide and the base functions as area of coating. Internal part of envelope and area of core are formed by means of one or several reaction-capable gases. After they are formed the tube of base is subject to shrinkage and elongation to single-mode optical fiber. Single-mode optical fiber produced has low hydrogen-induced attenuation at 1500 nm wavelength. EFFECT: lower hydrogen-induced attenuation. 15 cl, 8 dwg ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß RU (19) (11) 2 271 025 (13) C2 (51) ÌÏÊ G02B 6/036 (2006.01) C03B 37/018 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ÈÇÎÁÐÅÒÅÍÈß Ê ÏÀÒÅÍÒÓ (21), (22) Çà âêà: 2003100093/28, 08.06.2001 (24) Äàòà íà÷àëà îòñ÷åòà ñðîêà äåéñòâè ïàòåíòà: 08.06.2001 (72) Àâòîð(û): ÑÈÌÎÍÑ Äåííèñ Ðîáåðò (NL), ÁÐÅËÑ Àíòîíèóñ Õåíðèêóñ Ýëèçàáåò (NL) (73) Ïàòåíòîîáëàäàòåëü(è): ÄÐÀÊÀ ÔÀÉÁÐ ÒÅÊÍÎËÎÄÆÈ Á.Â. (NL) (30) Ïðèîðèòåò: 09.06.2000 NL 1015405 R U (43) Äàòà ïóáëèêàöèè çà âêè: 27.05.2004 (45) Îïóáëèêîâàíî: 27.02.2006 Áþë. ¹ 6 2 2 7 1 0 2 5 (56) Ñïèñîê äîêóìåíòîâ, öèòèðîâàííûõ â îò÷åòå î ïîèñêå: US 5033815 À, 23.07.1991. EP 0762159 A1, 12.03.1997. RU 2118299 C1, 27.08.1998. US 5090979 À, 25.02.1992. (85) Äàòà ïåðåâîäà çà âêè PCT íà ...

ОДНОМОДОВОЕ ОПТИЧЕСКОЕ ВОЛОКНО (ВАРИАНТЫ) И СПОСОБ ЕГО ИЗГОТОВЛЕНИЯ (ВАРИАНТЫ)

Изобретение относится к волоконной оптике и может быть использовано при изготовлении одномодовых оптических волокон для систем передач на основе мультиплексирования с разделением по длинам волн. Волокно создают путем осаждения SiO2 из газовой фазы на внешнюю поверхность стеклянного стержня, содержащего сердцевину и первую часть оболочки, для формирования второй части оболочки, спекание и вытягивание для получения волокна. По первому варианту отношение диаметра первой части оболочки к диаметру сердцевины находится в интервале от 4,0 до 4,8, а концентрации ОН в сердцевине, первой и второй частях оболочки не превышают 0,1 миллионной доли. По второму варианту отношение диаметра первой части оболочки к диаметру сердцевины составляет более 4,8, а концентрации ОН в сердцевине и первой части оболочки не превышают 0,1 миллионной доли, а во второй части оболочки не превышает 100 миллионных долей. Обеспечено снижение потерь в волокне в диапазоне 1380 нм и повышена стойкость к воздействию водорода.

ЗАГОТОВКА ДЛЯ ВОЛОКНА СО СВЕРХНИЗКИМИ ПОТЕРЯМИ И ВОЛОКНО, ПОЛУЧЕННОЕ СПОСОБОМ АКСИАЛЬНОГО ОСАЖДЕНИЯ ИЗ ПАРОВОЙ ФАЗЫ

Настоящее изобретение раскрывает волокно со сверхнизкими потерями. Вязкость сердцевинного слоя может быть уменьшена посредством введения щелочного металла в процессе аксиального осаждения из паровой фазы (АОПФ) таким образом, что сердцевинный слой лучше совмещается с внутренней оболочкой и наружной оболочкой, при этом также уменьшается внутреннее напряжение; в результате становится возможным получение волокна со сверхнизкими потерями и низким затуханием при передаче. Основу способа получения волокна со сверхнизкими потерями согласно настоящему изобретению представляет собой традиционный процесс осаждения АОПФ; на процесс обычного осаждения значительно не влияют низкое содержание легирующего щелочного металла и небольшой воздушный поток в процессе осаждения; легирование щелочным металлом в процессе осаждения осуществляют так, чтобы не увеличивать продолжительность производства и, таким образом, обеспечивать устойчивое получение в простом производственном процессе, который может быть использован ...

ЛЕГИРОВАННОЕ БРОМОМ ОПТИЧЕСКОЕ ВОЛОКНО

LICHTLEITER

WFOV and NFOV shared aperture beacon laser

Free-space optical communication includes guiding, by focusing optics 230, an optical communication beam 210 emitted from an optical transmitter 220 into a double-clad optical fibre 300. The double-clad optical fibre includes a fibre core 310 with a first numerical aperture NA-1, a first cladding 320 with a second numerical aperture NA-2 where NA-2 >= NA-1, and a second cladding 330. It also includes focussing optics 230 to guide light into the fibre and collimating optics 242 to direct light from the double-clad optical fibre toward an optical receiver of a communication terminal. The second portion 210l, 224 of the optical communication beam is arranged concentrically around the first portion 210h,222 of the optical communication beam which has a higher intensity than the second portion. The focussing optics may direct the first portion of the optical communication beam into the fibre core and the second portion of the beam into the first cladding. The optical transmitter may have a multi-mode ...

FIBER OPTIC MAGNETIC FIELD SENSOR

WFOV and NFOV shared aperture beacon laser

FIBRE OPTIC MAGNETIC FIELD SENSOR

EQUIPMENT TO THE LIGHT EMISSION WITH OPTICAL FIBER AND PROCEDURE FOR THE EMPLOYMENT THIS EQUIPMENT.

MONOMODIGE OPTICAL FIBER AND ASSOCIATED MANUFACTURING PROCESS

OPTICAL QUARTZ GLASS FIBER WITH DOUBLE POLYMERE COAT

OPTICAL FIBER FOR IN THE CITY AND ENTRANCE OF NETWORK SYSTEMS

PROCEDURE FOR THE PRODUCTION OF AN OPTICAL GATHERING MOLD OF MEANS OF AN INTERNAL STEAM SEPARATION PROCEDURE AS WELL AS THEREBY MANUFACTURED GATHERING MOLD

PLASTIC FIBRE OPTICS, FIBRE OPTICS CABLE AND OPTICAL DATA COMMUNICATION EQUIPMENT

Optical waveguide fiber with very thin titania-silica outer cladding layer and method for manufacturing same

MOISTURE-RESISTANT NANO-PARTICLE MATERIAL AND ITS APPLICATIONS

OPTICAL SYSTEM AND METHOD HAVING LOW LOSS AND NON-LINEAR EFFECTS

An apparatus and method for transmitting an optical signal. The invention is directed to a transmission line having first (16) and second (18) spans of single mode fiber. The fiber of the first span has a negative dispersion with an absolute value of between about 2.5 ps/nm/km and 10 ps/nm/km at the operating wavelength. The second span (18) is connected to the first span (16) and has a positive dispersion at the operating wavelength. The positive dispersion of the second span compensates for the negative dispersion of the first span such that the cumulative dispersion across the first and second spans is approximately zero. The increased dispersion of the first span coincides with characteristics to lower non-linear effects, permits a longer length of the second span, and helps lower attenuation in the transmission line.

METHOD OF FABRICATING A CYLINDRICAL OPTICAL FIBER CONTAINING AN OPTICALLY ACTIVE FILM

A method of forming a preform which has a glass core (10) surrounded by an outer glass cladding (16) with a coating (18) of an optically active material disposed between the core (10) and cladding (16). The method includes providing a glass core (10) having a viscosity which lies within a given preselected temperature range, followed by forming a substantially homogeneous coating (18) of an optically active material over the surface of the core, with the coating having a viscosity which is equal to or less than the viscosity of the glass core. A glass cladding (16) is formed over the coated layer (18), with the cladding (16) having a viscosity which overlaps the viscosity of the core glass (10) and a thermal coefficent of expansion compatible with that of the core. The optically active material is an inorganic material which includes a metal, metal alloy, ferrite, magnetic material or a semiconductor. The invention includes the product formed by the process.

THERMAL ROUNDING OF NON-CIRCULAR SHAPED OPTICAL FIBER

A method of thermally rounding a section of a non-circular optical fiber is provided. The method includes heating the section of the optical fiber with a sweeping motion along a direction substantially parallel to an optical axis of the optical fiber by at least one of moving the optical fiber with respect to a heat source and moving the heat source with respect to the optical fiber, such that a crosssection of an inner cladding of the section of the optical fiber becomes substantially circular.

OPTICAL FIBER LIGHT PRODUCING DEVICE AND METHOD OF PRODUCING THE SAME

ABR?GE Dispositif d'émission de lumière comprenant une source lumineuse placée à l'extrémité d'une fibre optique. L'enveloppe de cette comporte des zones définies constituées de concentrations d'impuretés introduites volontairement. Ces zones sont créés par des processus de dopage traditionnels utilisés en microélectronique, tels que la diffusion, l'implantation ionique, qui permettent de faire varier l'indice de réfraction dans ces zones, de telle sorte que cet indice, différent dans chacune des zones, soit supérieur à celui du coeur de façon à constituer un filtre optique par où la lumière s'échappe, de manière contrôlée, avec une couleur unique. Le dispositif selon l'invention est destiné à des textiles luminescents, tous types d'accessoires lumineux, et s'étend aussi écrans de visualisation pour ordinateurs ou autre interfaces visuelles.

Single-mode double-cladding dysprosium-doped chalcogenide glass optical fiber and preparation method thereof

FIBER OPTICAL MAGNETIC FIELD RESPONSIVE

SINGLE MODE OPTICAL FIBRE, AND METHOD FOR THE MANUFACTURE OF A SINGLE MODE OPTICAL FIBRE

The present invention relates to a method for the manufacture of a single mode optical fibre comprising a light- conductive core portion (4), an internal cladding portion (3) surrounding said core portion and a jacketing portion (1) surrounding said internal cladding portion, in which the refractive index of the core portion is larger than those of the cladding and jacketing portion areas, and in which the refractive indices of the cladding and jacketing portion areas are practically equal. © KIPO & WIPO 2007 ...

SIDE-ILLUMINATION TYPE OPTICAL FIBER

A side light type optical fiber, includes a core and a cladding disposed around the core, the cladding including a transparent first layer contacting the core, and a light diffusive second layer formed around the first layer, the layers being integrally molded. © KIPO & WIPO 2007 ...

SELECTIVELY ABSORBING OPTICAL FIBERS FOR OPTICAL AMPLIFIERS

The invention provides a selectively absorbing optical fiber that is transparent at pump wavelengths, and highly absorbing at signal wavelengths. The selectively absorbing optical fiber includes selectively absorbing species, such as rare earth ions, in concentrations sufficient to provide the desired absorbance selectivity. The fiber is useful as a fiber pigtail for pump lasers in optical amplifiers, where it can reduce the effects of multi-path interference by absorbing stray light with wavelengths in the signal band.

Dispersion shifted optical waveguide fiber

A single mode optical waveguide fiber designed for high data rate, or WDM systems or systems incorporating optical amplifiers. The optical waveguide has a compound core having a central region and at least one annular region surrounding the central region. A distinguishing feature of the waveguide core is that the minimum refractive index of the central core region is less than the minimum index of the adjacent annular region. A relatively simple profile design has the characteristics of ease in manufacturing together with, flexibility in tailoring Dw to yield a preselected zero dispersion wavelength, dispersion magnitude over a target wavelength range, and dispersion slope. The simplicity of profile gives reduced polarization mode dispersion.

Method and apparatus for distributed sensing of volatiles and a long period fiber grating sensor with modulated plastic coating for environmental monitoring

Optical time domain reflectometry caused by absorption of a volatile or analyte into the fiber optic cladding is used an optical nose. The fiber optics (14) are covered with a gas permeable film (44) which is patterned to leave millimeter wide gas permeable notches (48a-48d). The notches contain a sensing polymer that responds to different gases by expanding or contracting.

OPTICAL FIBER

An optical fiber according to an embodiment includes: a core; an inner cladding surrounding the core and having a refractive index smaller than a refractive index of the core; an outer cladding surrounding the inner cladding and having a smaller refractive index than the refractive index of the core and having a refractive index greater than the refractive index of the inner cladding, in which a ratio of a caustic radius to a MAC-value (caustic radius/MAC-value) at a bending radius of 10 mm at a wavelength of 1625 nm is 2.70 μm or more.

LITHIUM-NIOBATE FIBER OPTIC SENSOR AND SYSTEM

The present invention pertains to Lithium-Niobate fiber optical sensors ("LNCF") and systems for detection of load or pressure and strain or deformation changes that occur in a host material. The host material can be a component of a system, such as a part of a bridge, or a selected material, such as a geofoam, that provides a protective and compliant medium to which the LNCF would be securely attached.

OPTICAL SYSTEM AND METHOD HAVING LOW LOSS AND NON-LINEAR EFFECTS

ЛЕГИРОВАННОЕ БРОМОМ ОПТИЧЕСКОЕ ВОЛОКНО

Изобретение относится к получению одномодовых оптических волокон из легированного бромом кварцевого стекла. Оптическое волокно содержит сердцевину и оболочку, причем упомянутая сердцевина включает в себя кварцевое стекло, легированное с помощью Br, причем концентрация Br в сердцевине кварцевого стекла составляет от 1,75 вес.% до 4 вес.%. Упомянутая оболочка также может содержать бром. Дополнительно оптическое волокно может содержать хлор. упомянутая оболочка включает в себя внутреннюю оболочку и внешнюю оболочку, причем упомянутая внутренняя оболочка имеет более низкий относительный показатель преломления, чем упомянутая внешняя оболочка, а упомянутая внешняя оболочка имеет более низкий относительный показатель преломления, чем упомянутая сердцевина. Легирования бромом достигали с помощью SiBr4в качестве прекурсора. Легирование бромом может происходить во время нагревания, консолидации или спекания пористого тела из кварцевого стекла. Бром является примесью для увеличения показателя преломления ...

ОПТИЧЕСКОЕ ВОЛОКНО С ПОВЫШЕННОЙ МЕХАНИЧЕСКОЙ ПРОЧНОСТЬЮ

1. Оптическое волокно, содержащее сердцевину, внутренний слой оболочки, окружающий сердцевину, и верхний слой оболочки, окружающий внутренний слой оболочки, при этом верхний слой оболочки имеет сжимающее напряжение по меньшей мере 100 МПа.2. Оптическое волокно по п.1, при этом разность температуры размягчения верхнего слоя оболочки и температуры размягчения внутреннего слоя оболочки больше, чем 40°С.3. Оптическое волокно по п.1, при этом радиальная толщина верхнего слоя оболочки составляет от примерно 3% до примерно 30% радиальной толщины оптического волокна.4. Оптическое волокно, содержащее сердцевину и верхний слой оболочки, окружающий сердцевину, при этом верхний слой оболочки имеет сжимающее напряжение по меньшей мере 100 МПа.5. Способ изготовления оптического волокна, содержащий вытягивание оптического волокна из преформы оптического волокна, при этом оптическое волокно содержит сердцевину, внутренний слой оболочки, окружающий сердцевину, и верхний слой оболочки, окружающий внутренний слой оболочки, при этом верхний слой оболочки имеет сжимающее напряжение по меньшей мере 100 МПа. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК C03B 37/02 (13) 2012 141 057 A (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2012141057/03, 25.02.2011 (71) Заявитель(и): КОРНИНГ ИНКОРПОРЕЙТЕД (US) Приоритет(ы): (30) Конвенционный приоритет: 26.02.2010 US 61/308,583 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 26.09.2012 R U (43) Дата публикации заявки: 10.04.2014 Бюл. № 10 (72) Автор(ы): БЕННЕТТ Кевин У. (US), ФИЛИППОВ Андрей В. (US), РОНКО Питер Дж. (US), РОУЗ Роджер А. (US), ТАНДОН Пушкар (US) (86) Заявка PCT: (87) Публикация заявки PCT: WO 2011/106585 (01.09.2011) A Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" R U (57) Формула изобретения 1. Оптическое волокно, содержащее сердцевину, внутренний слой оболочки, окружающий сердцевину, и ...

ОДНОМОДОВОЕ ОПТИЧЕСКОЕ ВОЛОКНО СО СВЕРХНИЗКИМ ЗАТУХАНИЕМ И БОЛЬШОЙ ЭФФЕКТИВНОЙ ПЛОЩАДЬЮ

Одномодовое оптическое волокно со сверхнизким затуханием и большой эффективной площадью содержит слой (1) сердцевины, первый, второй, третий и четвертый слои (5) оболочки. Первый слой (2) оболочки - легированный фтором кварц; второй, третий и четвертый слои (5) оболочки представляют собой кварц. Третий слой (4) оболочки содержит по меньшей мере один кольцевой микропористый слой, который содержит множество равномерно распределенных микропор (40), причем центры круга микропор (40) в каждом кольцевом микропористом слое являются концикулярными, и круги являются концентрическими со слоем (1) сердцевины. Слой (1) сердцевины - легированный щелочным металлом кварц, содержащий внутренний слой (10) сердцевины и переходный слой (11) сердцевины. Одномодовое оптическое волокно имеет сверхнизкое затухание и большую эффективную площадь и может реализовывать волоконно-оптическую передачу по крупномодовому полю и уменьшать нелинейный эффект передачи с большой пропускной способностью. Технический результат ...

Optische Wellenleiterfaser mit einem Titandioxyd-Siliziumoxyd-Aussenmantel und Verfahren zu deren Herstellung.

Multimode-Gradientenfaser und Herstellungsverfahren dafür

WFOV and NFOV shared aperture beacon laser

CONTINUOUS FIBRE FABRICATION PROCESS

OPTICAL FIBRES

A coated optical fibre

PROCEDURE FOR MANUFACTURING COVERS OF OPTICAL GLASS FIBERS FOR THE USE AS TRANSVERSE ELECTROMAGNETIC WAVE

PROCESSING METHOD FOR FIBER-OPTIC BUNDLES

Flexible flat color display

Partially detached core optical waveguide

Illumination waveguide and method for producing same

Decreased H2 sensitivity in optical fiber

método para fabricar uma preforma ótica por meio de um processo de deposição de vapor interno, bem como uma preforma obtida com isto

OPTICAL FIBER HAVING LOW POLARIZATION-MODE DISPERSION AND LOW ATTENUATION AND METHOD OF ITS MANUFACTURE

A method of fabricating an optical waveguide fiber that includes the steps of providing a cylindrical glass optical fiber preform having a longitudinally extending centerline hole, and closing the hole under conditions suitable to result in uniform and symmetric hole closure. The method may include first plugging a first end and a second end of the centerline hole to prevent gas flow therethrough. The method preferably involves closing the centerline hole of the preform by drawing the preform down into an optical waveguide fiber. An optical fiber produced by the method has a polarization mode dispersion (PMD) of <0.2 ps km-2.

MULTI-CLAD OPTICAL FIBER AND AMPLIFIER

An optical amplifier (18) for proposed use in a free-space optical network includes a multi-clad optical fiber (10) having a single-mode core (12) doped with a rare-earth laser active dopant, a passive inner cladding (14) surrounding the core (12), and at least one outer cladding (16) surrounding the inner cladding (14). The amplifier (18) further includes a source of pump light (20) that is coupled directly into the core (12), and a source of signal light (22) that is coupled into the inner cladding (14). The signal light (30, 32) collected in the inner cladding (14) propagates along the optical fiber (10) for a distance sufficient for the signal light (32) to couple into the core (12) and for the signal light (32) to be amplified by the amplifying light (28) emitted within the core (12).

FLEXIBLE FLAT COLOR DISPLAY

A flexible electronic color display (14) includes a light-emitting diode (LED) matrix (10) formed from an interweaved weft (22) of conductive strands (20) and warp (18) of light-emitting diode (LED) fiber (16) of a conductive core B coated with a p-doped semiconductor (P) and then an n-doped seminconductor (N) of light-emitting polymer. Each conductive strand (20) physically and electrically couples to each LED fiber (16) at one location (24) to form an LED tant may activated as a pixel. Alternating LED fibers (16) of different hues may provide a color display, especially for a relatively fine weave or for displays viewed from a distance. Alternatively, conductive strands (20) and LED fibers (16) may be selected having sufficient transparency that layers of multiple LED matrices, each having a selected hue, may form a color flexible display. In addition, methods for fabricating the LED matrix and for detecting and eliminating flaws from the LED matrix allow for economical manufacture.

Fiber for enhanced energy absorption

Fibers, including fiber lasers and fiber amplifiers, and systems containing such fibers are disclosed.

Optical waveguide fiber with very thin titania-silica outer cladding layer

Rare-earth doped gain fibers

Rare earth oxides doped multicomponent glass fibers for laser generation and amplification, including a core and a cladding, the core comprising at least 2 weight percent glass network modifier selected from BaO, CaO, MgO, ZnO, PbO, K2O, Na2O, Li2O, Y2O3, or combinations; wherein the mode of the core is guided with step index difference between the core and the cladding, a numerical aperture of the fiber is between 0.01 and 0.04; core diameter is from 25 to 120 micron, and a length of the gain fiber is shorter than 60 cm.

Faseroptischer Verstärker

WFOV AND NFOV SHARED APERTURE BEACON LASER

A-WAVY FIBRE OPTICS FROM QUARTZ GLASS AND PROCEDURE FOR ITS PRODUCTION.

VERFAHREN ZUM HERSTELLEN UMMANTELTER OPTISCHER GLASFASERN ZUR VERWENDUNG ALS WELLENLEITER

OPTICAL FIBER

Decreased h2 sensitivity in optical fiber

An optical fiber and a method for fabricating a low polarization-mode dispersionand low attenuation optical fiber

METHOD OF MAKING GLASS OPTICAL WAVEGUIDE

FRACTIONAL CLADDING FOR OPTICAL FIBERS

An optical fiber system comprises an optical fiber having a doped core and a first cladding about the doped core. The optical fiber has a first longitudinal portion and a second longitudinal portion, and is arranged such that the first longitudinal portion and the second longitudinal portion are longitudinally side by side. The first cladding of the first longitudinal portion is adjacent to the first cladding of the second longitudinal portion such that light propagating in the first cladding can move laterally from the first longitudinal portion to the second longitudinal portion to increase the amount of light reaching the doped core. The optical fiber is adapted to be coupled to a power input and has an output end for outputting light emitted by the doped core. The second fractional cladding about the first cladding conceals light in the first cladding.

INTEGRATED OPTICAL WAVEGUIDE EVANSCENT FIELD SENSOR

Integrated optical waveguide evanescent field sensor for sensing of chemical and/or physical quantities, comprising a substrate carrying a waveguide layer structure provided with—a waveguide core layer () sandwiched between two cladding layers () formed by a lower () and a upper cladding layer (), of a lower refractive index than the waveguide core layer,—a sensing section comprising a sensing layer () included in the upper cladding layer, wherein said sensing layer is exchangeable as a separate element. 1. An integrated optical waveguide evanescent field sensor for sensing of chemical and/or physical quantities , comprising a substrate carrying a waveguide layer structure comprisinga waveguide core layer sandwiched between two cladding layers formed by a lower and a upper cladding layer, of a lower refractive index than the waveguide core layer,a sensing section comprising a sensing layer included in the upper cladding layer, characterized in that said sensing layer is exchangeable as a separate element.2. The integrated optical waveguide evanescent sensor according to claim 1 , wherein the waveguide layer structure comprises a second waveguide core layer sandwiched between two second cladding layers formed by a second lower and a second upper cladding layer claim 1 , of a lower refractive index than the second waveguide core layer.3. The integrated optical waveguide evanescent sensor according to claim 2 , wherein the sensor comprises a second sensing section comprising a second sensing layer included in said second upper cladding layer.4. The integrated optical waveguide evanescent sensor according to claim 2 , wherein the waveguide layer structure comprises a splitter for optically splitting a common input waveguide core layer into said first and second waveguide core layers at a first junction.5. The integrated optical waveguide evanescent sensor according to claim 2 , wherein the waveguide layer structure comprises a combiner for optically coupling said first ...

RARE EARTH DOPED AND LARGE EFFECTIVE AREA OPTICAL FIBERS FOR FIBER LASERS AND AMPLIFIERS

Various embodiments described herein include rare earth doped glass compositions that may be used in optical fiber and rods having large core sizes. Such optical fibers and rods may be employed in fiber lasers and amplifiers. The index of refraction of the glass may be substantially uniform and may be close to that of silica in some embodiments. Possible advantages to such features include reduction of formation of additional waveguides within the core, which becomes increasingly a problem with larger core sizes. 1. An optical fiber system for providing optical amplification , said optical fiber system comprising: [{'sub': 'core', 'a core having a core radius ρ and a core index of refraction n, wherein said core comprises a doped region;'}, {'sub': 1', 'c1', 'core', 'c1, 'a first cladding disposed about said core, said first cladding having an outer radius ρand an index of refraction n, said core and said first cladding having a difference in index of refraction Δn=n−n; and'}, {'sub': '1', 'a second cladding disposed about said first cladding, said first cladding and said second cladding having a difference in index of refraction Δn,'}, {'sub': 1', '1, 'wherein the first cladding radius, ρ, is greater than about 1.1ρ and less than about 2ρ, and the refractive index difference between said first cladding and said second cladding, Δn, is greater than about 1.5Δn and less than about 50Δn,'}, 'wherein said large-core optical fiber comprises a combined waveguide formed by said core and said first cladding layer, said combined waveguide configured such that a mode supported in said core has increased gain relative to a mode having substantial power in said first cladding., 'a large-core optical fiber comprising2. The optical fiber system of claim 1 , wherein said second cladding comprises holes that are configured to provide leakage channels such that said large-core optical fiber supports one or a few modes and higher order modes are leaked.3. The optical fiber system of ...

METHOD AND APPARATUS FOR FABRICATION OF METAL-COATED OPTICAL FIBER, AND THE RESULTING OPTICAL FIBER

Method and apparatus for producing metal-coated optical fiber involves providing a length of optical fiber having a glass fiber with or without a carbon layer surrounded by a liquid-soluble polymeric coating. The optical fiber is passed through a series of solution baths such that the fiber will contact the solution in each bath for a predetermined dwell time, the series of solution baths effecting removal of the polymer coating and subsequent electroless plating of metal on the glass fiber. The optical fiber is collected after metal plating so that a selected quantity of the metal-coated optical fiber is gathered, Preferably, the glass fiber passes through the series of solution baths without contacting anything except for the respective solution in each. 1. A method for producing metal-coated optical fiber , said method comprising:(a) providing a length of optical fiber having a glass fiber surrounded by a liquid soluble polymeric coating;(b) passing said optical fiber through a series of solution baths such that the glass fiber will contact the solution in each bath for a predetermined dwell time, the series of solution baths effecting removal of said polymer coating and subsequent plating of metal on the glass fiber; and(c) collecting the optical fiber after metal plating so that a selected quantity of said metal-coated optical fiber is gathered.2. A method as set forth in claim 1 , wherein said glass fiber has a carbon layer.3. A method as set forth in claim 1 , wherein said liquid soluble polymeric coating comprises a polymeric material that is removed by a chemical solvent.4. A method as set forth in claim 3 , wherein said polymeric material that is removed by a chemical solvent comprises acrylate.5. A method as set forth in claim 1 , wherein said liquid soluble polymeric coating comprises a water soluble polymer.6. A method as set forth in claim 5 , wherein said water soluble polymer is selected from the group consisting of sodium polyacrylater claim 5 , ...

METHOD AND APPARATUS FOR PRODUCING CRYSTALLINE CLADDING AND CRYSTALLINE CORE OPTICAL FIBERS

We provide methods and apparatus for preparing crystalline-clad and crystalline core optical fibers with minimal or no breakage by minimizing the influence of thermal stress during a liquid phase epitaxy (LPE) process as well as the fiber with precisely controlled number of modes propagated in the crystalline cladding and crystalline core fiber via precisely controlling the diameter of crystalline fiber core with under-saturated LPE flux. The resulting crystalline cladding and crystalline core optical fibers are also reported. 1. A method for preparing a crystalline clad and crystalline core optical fiber , comprising:securing a crystalline fiber core having a refractive index and a first end and a second end in a holder with no or minimized thermally induced stress, wherein the first end of the crystalline fiber core is secured in the holder and wherein the second end is free to move in at least an axial direction of the fiber within the holder;immersing the crystalline fiber core into at least one molten liquid phase epitaxy (LPE) solution comprising at least one flux material and at least one cladding material until a crystalline cladding layer has formed thereon, said crystalline cladding layer having a lower refractive index than the crystalline fiber core refractive index.2. The method of claim 1 , further comprising claim 1 , prior to the step of immersing the crystalline fiber core claim 1 , reducing thermally induced stress on the crystalline fiber core by bending the crystalline fiber core in at least one location on the crystalline fiber core.3. The method of claim 1 , further comprising the molten LPE solution through a 1-dimensional or 2-dimensional mesh bottom support claim 1 , wherein the molten flux passes through the mesh bottom support and there is a relative movement between the fiber core preform and mesh bottom support along at least the axial direction of the fiber during an LPE growing process claim 1 , resulting in a uniform cladding growth.4 ...

MANUFACTURING METHOD OF DOUBLE CLADDING CRYSTAL FIBER

The present invention relates to a manufacturing method of a double cladding crystal fiber, in which growing an YAG or a sapphire into a single crystal fiber by LHPG method, placing the single crystal fiber into a glass capillary for inner cladding, placing the single crystal fiber together with the glass capillary for inner cladding into a glass capillary for outer cladding in unison, heating the glass capillary for inner cladding and outer cladding by the LHPG method to attach to the outside of the single crystal fiber, and thus growing into a double cladding crystal fiber. When the present invention is applied to high power laser, by using the cladding pumping scheme, the high power pumping laser is coupled to the inner cladding layer, so the problems of heat dissipation and the efficiency impairment due to energy transfer up-conversion of high power laser are mitigated. 1. A manufacturing method of a double cladding crystal fiber , comprising the steps of:providing a yttrium aluminum garnet (YAG) or a sapphire single crystal rod;growing said single crystal rod into a single crystal fiber having a predetermined diameter by means of the Laser-Heated Pedestal Growth (LHPG) method;providing a glass capillary for inner cladding, wherein said single crystal fiber is placed into said glass capillary for inner cladding;providing a glass capillary for outer cladding, wherein said single crystal fiber together with said glass capillary for inner cladding are placed into said glass capillary for outer cladding in unison; andheating said glass capillary for inner cladding and said glass capillary for outer cladding simultaneously by means of the LHPG method, in such a way that said glass capillary for inner cladding together with said glass capillary for outer cladding are softened and melted simultaneously to attach to the outside of said single crystal fiber, and thus grown into a double cladding crystal fiber.2. The manufacturing method according to claim 1 , wherein the ...

OPTICAL FIBER, METHOD FOR MANUFACTURING OPTICAL FIBER, AND OPTICAL FIBER PREFORM

An optical fiber includes: a core; and a cladding layer disposed on an outer circumference of the core. A Cl concentration in the cladding layer is 0.029 wt % to 0.098 wt %. In the optical fiber, Δ2−Δ1≤0 dB/km is satisfied at a wavelength of 430 nm where Δ1 is a value of transmission loss before exposure of the optical fiber to hydrogen and Δ2 is a value of transmission loss after the exposure. 1. An optical fiber comprising:a core; anda cladding layer disposed on an outer circumference of the core, wherein a Cl concentration in the cladding layer is 0.029 wt % to 0.098 wt %.2. The optical fiber according to claim 1 , whereinΔ2−Δ1≤0 dB/km is satisfied at a wavelength of 430 nm, where Δ1 is a value of transmission loss before exposure of the optical fiber to hydrogen and Δ2 is a value of transmission loss after the exposure.3. The optical fiber according to claim 1 , whereinΔ2−Δ1≤0.005 dB/km is satisfied at a wavelength of 1550 nm, where Δ1 is a value of transmission loss before exposure of the optical fiber to hydrogen and Δ2 is a value of transmission loss after the exposure.4. The optical fiber according to claim 1 , whereinan OH group concentration in the cladding layer is less that or equal to 10 ppm.5. A method for manufacturing an optical fiber including a core and a cladding layer disposed on an outer circumference of the core claim 1 , the method comprising:dehydrating the cladding layer with Cl-containing gas such that a Cl concentration in the cladding layer is 0.029 wt % to 0.098 wt %.6. The method according to claim 5 , whereinthe cladding layer is dehydrated with mixed gas comprising Cl-containing gas and F-containing gas.7. An optical fiber preform for manufacturing an optical fiber including a core and a cladding layer disposed on an outer circumference of the core claim 5 , whereina Cl concentration in a soot that forms the cladding layer is 0.029 wt % to 0.098 wt %. This is a U.S. national stage application of International Application No. PCT/ ...

OPTICAL SENSING BASED ON FUNCTIONALIZED EVANESCENT FIBER SENSOR FOR PROCESS FLUID FLOW ANALYSIS

Disclosed is an optical sensor device for detecting a chemical analyte including a light source configured to generate probe light having a first wavelength spectrum, an optical fiber sensor probe including a mechanically processed optical fiber segment which is chemically functionalized to include a sensing material formed on exterior of the fiber segment, the optical fiber sensor probe coupled to receive and guide the generated probe light inside the optical fiber sensor probe while allowing optical evanescent coupling between probe light guided inside the optical fiber sensor probe and the sensing material, and a detector coupled to the optical fiber sensor probe to optically detect the guided probe light to obtain information on a material property of the sensing material. 1. An optical sensor device for detecting a chemical analyte , comprising:a light source configured to generate probe light having a first wavelength spectrum;an optical fiber sensor probe including a mechanically processed optical fiber segment which is chemically functionalized to include a sensing material formed on exterior of the fiber segment, the optical fiber sensor probe coupled to receive and guide the generated probe light inside the optical fiber sensor probe while allowing optical evanescent coupling between probe light guided inside the optical fiber sensor probe and the sensing material; anda detector coupled to the optical fiber sensor probe to optically detect the guided probe light to obtain information on a material property of the sensing material.2. The device of claim 1 , wherein the optical fiber segment includes a fiber segment having a partially removed cladding on a core claim 1 , wherein the sensing material is disposed on the partially removed cladding.3. The device of claim 2 , wherein the sensing material includes a colorimetric pH sol-gel formulation claim 2 , a moisture/humidity-sensitive colorimetric compound claim 2 , or an oxygen-sensitive fluorescent ...

Power over fiber system and optical fiber cable

A power over fiber system includes an optical fiber cable. The optical fiber cable includes a core, a first cladding and a second cladding. The core transmits signal light. The first cladding is positioned in contact with periphery of the core and transmits feed light. The second cladding is positioned in contact with periphery of the first cladding. Radial refractive index distribution of the first cladding is distribution in which refractive index gradually decreases from a local maximum at an internal point toward points where the first cladding is in contact with the core and the second cladding, respectively. The internal point is away from the core and the second cladding. The refractive index of the core is higher than the refractive index of the first cladding at the point where the first cladding is in contact with the core.

METHOD OF MANUFACTURING OPTICAL FIBER PREFORM AND OPTICAL FIBER

A method of manufacturing an optical fiber preform includes forming a porous body that is made of glass particles and includes a first region and a second region formed on an outer circumference of the first region, performing a first heat treatment on the porous body under an atmosphere containing a fluorine gas, performing a second heat treatment on the porous body after the first heat treatment at a higher temperature than that of the first heat treatment to form a transparent glass body, and forming a cladding portion on an outer circumference of the transparent glass body. 1. A method of manufacturing an optical fiber preform , comprising:forming a porous body that is made of glass particles and includes a first region and a second region formed on an outer circumference of the first region;performing a first heat treatment on the porous body under an atmosphere containing a fluorine gas;performing a second heat treatment on the porous body after the first heat treatment at a higher temperature than that of the first heat treatment to form a transparent glass body; andforming a cladding portion on an outer circumference of the transparent glass body.2. The method of manufacturing the optical fiber preform according to claim 1 , wherein a bulk density of the second region of the porous body is 0.1 g/cmto 0.4 g/cm.3. The method of manufacturing the optical fiber preform according to claim 1 , wherein a ratio of a diameter of the first region to an outer diameter of the second region is 1:1.5 to 1:6.5.4. The method of manufacturing the optical fiber preform according to claim 1 , wherein a partial pressure of the fluorine gas in the atmosphere of the first heat treatment is 0.02% to 0.2%.5. The method of manufacturing the optical fiber preform according to claim 1 , wherein a temperature in the first heat treatment is 800° C. to 1250° C.6. The method of manufacturing the optical fiber preform according to claim 1 , wherein a temperature in the second heat ...

QUASI-SINGLE-MODE OPTICAL FIBER WITH A LARGE EFFECTIVE AREA

A quasi-single-mode optical fiber with a large effective area is disclosed. The quasi-single-mode fiber has a core with a radius greater than 5 μm, and a cladding section configured to support a fundamental mode and a higher-order mode. The fundamental mode has an effective area greater than 170 μmand an attenuation of no greater than 0.17 dB/km at a wavelength of 1530 nm. The higher-order mode has an attenuation of at least 1.0 dB/km at the wavelength of 1530 nm. The quasi-single-mode optical fiber has a bending loss of less than 0.02 dB/turn for a bend diameter of 60 mm for a wavelength of 1625 nm. 1. A quasi-single-mode (QSM) optical fiber , comprising:{'sub': 0', '1, 'a core having a centerline and an outer edge, with a peak refractive index non the centerline and a refractive index nat the outer edge;'}a cladding section surrounding the core, wherein the cladding section includes an inner annular moat region immediately adjacent the core;{'sub': 01', '11, 'wherein the core and cladding section support a fundamental mode LPand a higher-order mode LPand define{'sub': 01', 'eff, 'sup': '2', 'i) for the fundamental mode LP: an effective area A>170 μmand an attenuation of no greater than 0.17 dB/km of at 1530 nm;'}{'sub': '11', 'ii) for the higher-order mode LP: an attenuation of at least 1.0 dB/km at 1530 nm; and'}{'sub': 'B', 'iii) a bending loss of BL<0.02 dB/turn at 1625 nm and for a bend diameter D=60 mm.'}2. The QSM optical fiber according to claim 1 , wherein the core has a radius that is greater than 5 μm.3. The QSM optical fiber according to claim 2 , wherein the core radius is greater than 7 μm.4. The QSM optical fiber according to claim 2 , further comprising a 2m cutoff wavelength λc>1600 nm.5. The QSM optical fiber according to claim 4 , wherein the first inner annular cladding region has a minimum refractive index n claim 4 , and wherein the cladding section further includes a moat immediately adjacent the inner annular cladding region and having ...

Optical fiber

An optical fiber includes an optical transmission medium having a core and a cladding, a primary resin layer disposed in contact with the optical transmission medium to coat the optical transmission medium, and a secondary resin layer coating the primary resin layer, wherein a Young's modulus of the primary resin layer is 0.5 MPa or less at 23° C., and the primary resin layer comprises a cured product of an ultraviolet light curable resin composition containing a urethane (meth)acrylate oligomer, a monomer, a photopolymerization initiator and a β-diketone compound, and tin.

BENDING INSENSITIVE SINGLE MODE OPTICAL FIBER

In one aspect of the invention, the bend insensitive single-mode optical fiber includes a core layer and cladding layers having an inner cladding layer, a trench cladding layer and an outer cladding layer sequentially formed surrounding the core layer from inside to outside. For the core layer, the diameter is 7-7.9 μm, and the relative refractive index difference Δis between 4.6×10and 6.5×10. For the inner cladding layer, the diameter is 16.5-20 μm, and a relative refractive index difference Δis between −3×10and 3×10. For the trench cladding layer, the diameter is 33-40 μm, and the relative refractive index difference Δis between −2.9×10and −7.3×10, changes in a gradient manner and increases gradually from outside to inside, where a relative refractive index difference Δat an outermost interface is smaller than a relative refractive index difference Δat an innermost interface. 1. A bend insensitive single-mode optical fiber , comprising:a core layer; andcladding layers surrounding the core layer,{'sub': '1', 'sup': −3', '−3, 'wherein a diameter, a, of the core layer is between 7 μm and 7.9 μm, and a relative refractive index difference Δof the core layer is between 4.6×10and 6.5×10; and'}wherein the cladding layers surrounding the core layer comprises an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer and an outer cladding layer surrounding the trench cladding layer;{'sub': '2', 'sup': −4', '−4, 'wherein a diameter, b, of the inner cladding layer is between 16.5 μm and 20 μm, and a relative refractive index difference Δof the inner cladding layer is between −3×10and 3×10; and'}{'sub': 3', '3', '32', '31, 'sup': −3', '−3, 'wherein a diameter, c, of the trench cladding layer is between 33 μm and 40 μm, and a relative refractive index difference Δof the trench cladding layer is between −2.9×10and −7.3×10, wherein the relative refractive index difference Δchanges in a gradient manner and increases gradually ...

LIGHT-DIFFUSING OPTICAL FIBER HAVING NANOSTRUCTURED INNER AND OUTER CORE REGIONS

A light-diffusing optical fiber having nanostructured inner and outer core regions is disclosed. The nanostructured inner core region is defined by a first configuration of voids that defines a first amount of light scattering. The outer core region is defined by a second configuration of voids that defines a second amount of light scattering that is different from the first amount of light scattering. A cladding surrounds the nanostructured core. Light scattered out of the inner core region scatters from the outer core region and then out of the cladding as scattered light. Selective bending of the light-diffusing optical fiber is used to define a bending configuration that allows for tailoring the intensity distribution of the scattered light emitted from the fiber as a function of the length of the fiber. 1. A light-diffusing optical fiber , comprising: [{'sub': '30', 'i) a nanostructured inner core region having a refractive index nand defined by a first configuration of voids that defines a first amount of light scattering;'}, {'sub': '50', 'ii) at least one nanostructured outer core region that surrounds the nanostructured inner core region and that has a refractive index nand that is defined by a second configuration of voids that defines a second amount of light scattering that is different from the first amount of light scattering; and'}], 'a) a nanostructured core that includesb) a cladding that surrounds the nanostructured core.2. The light-diffusing optical fiber according to claim 1 , wherein the first amount of light scattering is less than the second amount of light scattering.3. The light-diffusing optical fiber according to claim 1 , wherein the first amount of light scattering is greater than the second amount of light scattering.4. The light-diffusing optical fiber according to claim 1 , further including at an one annular isolation region between the nanostructured inner core region and the at least one outer core region claim 1 , wherein the ...

Polarization-Maintaining (PM) Double-Clad (DC) Optical Fiber

A double-clad (DC) polarization-maintaining (PM) optical fiber comprises a core, an inner cladding, an outer cladding, and stress rods. The core has a core refractive index (n). The inner cladding is located radially exterior to the core and has an inner cladding refractive index (n), which is less than n. The stress rods are located in the inner cladding, and each stress rod has a stress rod refractive index (n), which is substantially matched to n. The outer cladding is located radially exterior to the inner cladding. The outer cladding has an outer cladding refractive index (n), which is less than n. 1. A high-power optical system , comprising: (a1) a substantially perpendicular leading edge;', '(a2) a core;', {'sub': '1', '(a3) an inner cladding surrounding the core; the inner cladding having an inner cladding refractive index (n); and'}, {'sub': 2', '2', '1, 'claim-text': (a4A) a bowtie configuration;', '(a4B) a panda configuration; and', '(a4C) an elliptical region radially exterior to the core;, '(a4) a stress region located in the inner cladding, the stress region comprising a stress region refractive index (n), a difference between nand nbeing between approximately 0.001 and approximately 0.003, the stress region being stress rods exhibiting a configuration selected from the group consisting of], '(a) a double-clad (DC) polarization-maintaining (PM) optical fiber comprising(b) an input fiber core-match spliced to the core of the PM-DC fiber at the substantially perpendicular leading edge, the input fiber for introducing a signal to the core of the DC-PM optical fiber; and(c) a pump combiner optically spliced to the PM-DC fiber at the perpendicular leading edge of the stress region, the pump combiner for introducing pump light into the inner cladding at the substantially perpendicular leading edge, the pump combiner further for introducing pump light into the stress region at the substantially perpendicular leading edge.2. The system of claim 1 , further ...

Optical device and optical device manufacturing method

Provided is an optical device whose resin member is less likely to reach a high temperature, as compared with that of a conventional optical device. The optical device ( 1 ) includes (i) an optical fiber ( 11 ) in which a jacket-removed section (I 1 ) is provided and (ii) a resin member ( 12 ) in which the jacket-removed section (I 1 ) is embedded. The jacket-removed section (I 1 ) is a section in which a part of a jacket ( 112 ) covering an outer surface of a cladding ( 111 b ) is removed so that only a part of the outer surface of the cladding ( 111 b ) is exposed in a cross section of the optical fiber ( 11 ).

OPTICAL FIBER AND METHOD OF MANUFACTURING THE SAME

An optical fiber is provided. The optical fiber has a refractive index profile that includes a central core, an inner cladding layer, a trench layer, and an outer cladding layer. A trench layer is provided with a reduced refractive index. The optical fiber has a large effective area without having an increase of a cutoff wavelength, and exhibits low macrobending loss. 1. An optical fiber comprising:{'sub': 1', '1, 'a core having an outer radius rand a refractive index n;'}{'sub': 2', '2, 'an inner cladding layer provided on a periphery of the core, the inner cladding layer having an outer radius rand a refractive index n;'}{'sub': 3', '3, 'a trench layer provided on a periphery of the inner cladding layer, the trench layer having an outer radius rand a refractive index n; and'}{'sub': 4', '4, 'an outer cladding layer provided on a periphery of the trench layer, the outer cladding layer having an outer radius rand a refractive index n,'} [{'sub': 1max', '2', '3', '4, 'a maximum refractive index of the core nis greater than n, n, and n,'}, {'sub': 3min', '1', '2', '4, 'a minimum refractive index of the trench layer nis less than n, n, and n,'}], 'wherein{'sub': '3min', 'claim-text': [{'sub': 'eff', 'sup': 2', '2, 'an effective area Aat a wavelength of 1550 nm is from about 100 μmto about 140 μm, and'}, 'a macrobending loss at a wavelength of 1550 nm is less than about 0.5 dB for 10 turns at a bending radius of 15 mm, and', 'a cable cutoff wavelength with substantially single-mode propagation is about 1460 nm to about 1625 nm., 'a relative refractive index difference of a minimum refractive index of the trench layer to the refractive index of the outer cladding layer Δis between about −0.30% and about −0.15%,'}2. The optical fiber of claim 1 , wherein:{'sub': 2', '1, 'a ratio r/ris from about 3.0 to about 4.5, and'}{'sub': '1max', 'a relative refractive index difference of a maximum refractive index of the core portion to the refractive index of the outer cladding ...

OPTICAL FIBER PREFORM, METHOD FOR PRODUCING OPTICAL FIBER, AND OPTICAL FIBER

An easily producible optical fiber preform which is drawn to an optical fiber having a core containing a sufficient concentration of alkali metal is provided. An optical fiber preform is composed of silica-based glass and includes a core portion and a cladding portion . The core portion includes a first core portion including a central axis and a second core portion disposed on the perimeter of the first core portion . The cladding portion includes a first cladding portion disposed on the perimeter of the second core portion and a second cladding portion disposed on the perimeter of the first cladding portion . The core portion contains an alkali metal at an average concentration of 5 atomic ppm or more. The concentration of the OH group in the perimeter portion of the first cladding portion is 200 mol ppm or more.

Optical Fibre And Optical Fibre Device

An optical fibre () which has a first refractive index profile () that can be changed by heating to a second refractive index profile (), at least one first dopant () for providing the first refractive index profile, at least one concealed dopant (), and at least one mobile dopant (), wherein the mobile dopant has a molar refractivity and is present in a concentration () such as to balance a change () in the first refractive index profile induced by the concealed dopant, and has a diffusion constant () greater than a diffusion constant () of the concealed dopant, so that heating of the optical fibre causes the mobile dopant to diffuse more quickly than the concealed dopant, thereby allowing the concealed dopant and the mobile dopant to change the first refractive index profile to the second refractive index profile. 1. An optical fibre which has a first refractive index profile that can be changed by heating to a second refractive index profile , the optical fibre comprising at least one core , a cladding , at least one first dopant for providing the first refractive index profile , at least one concealed dopant , and at least one mobile dopant , the core having a refractive index that is greater than a refractive index of the cladding , and the optical fibre being characterized in that:one of the concealed dopant and the mobile dopant has a negative molar refractivity and the other one has a positive molar refractivity;the mobile dopant is present in a concentration to balance the change in the first refractive index profile induced by the concealed dopant;the concealed dopant is present in a concentration that if not balanced by the mobile dopant would change the first refractive index profile;the mobile dopant has a diffusion constant greater than a diffusion constant of the concealed dopant so that heating of the optical fibre causes the mobile dopant to diffuse more quickly than the concealed dopant, thereby allowing the concealed dopant and the mobile dopant ...

METHOD AND APPARATUS FOR PRODUCING CRYSTALLINE CLADDING AND CRYSTALLINE CORE OPTICAL FIBERS

We provide methods and apparatus for preparing crystalline-clad and crystalline core optical fibers with minimal or no breakage by minimizing the influence of thermal stress during a liquid phase epitaxy (LPE) process as well as the fiber with precisely controlled number of modes propagated in the crystalline cladding and crystalline core fiber via precisely controlling the diameter of crystalline fiber core with under-saturated LPE flux. The resulting crystalline cladding and crystalline core optical fibers are also reported. 115-. (canceled)16. A crystalline cladding and crystalline core optical fiber , comprising:at least one crystalline cladding, said crystalline cladding surrounding a crystalline core;the refractive index of crystalline cladding is (0.01% to 10%) lower than that of crystalline core;the diameter of crystalline core is within the range of 1 micron to 150 microns;the thickness of crystalline cladding layer is within the range of 1 micron to 1,000 microns;the length of crystalline cladding and crystalline core fiber is within the range of 1 cm to 10,000 cm.17. The crystalline cladding and crystalline core fiber of claim 16 , wherein the core and/or cladding has a garnet composition of R3 (Al claim 16 , T)5O12 wherein R represents one or more of the elements selected from the group consisting of calcium claim 16 , magnesium claim 16 , sodium claim 16 , strontium claim 16 , yttrium claim 16 , lanthanum claim 16 , praseodymium neodymium claim 16 , samarium claim 16 , europium claim 16 , gadolinium claim 16 , terbium claim 16 , dysprosium claim 16 , holmium claim 16 , erbium claim 16 , thulium claim 16 , ytterbium and lutetium; and T represents one or more of the 3-valent elements selected from the group consisting of gallium claim 16 , indium claim 16 , and scandium.18. The crystalline cladding and crystalline core fiber of claim 16 , wherein the core and/or cladding material is selected from the group consisting of pure and/or doped yttrium lithium ...

FREQUENCY-CONVERTED OPTICAL BEAMS HAVING ADJUSTABLE BEAM CHARACTERISTICS

An optical beam delivery system, includes: an optical beam source; a fiber assembly situated to receive and modify one or more beam characteristics of an optical beam; and a nonlinear frequency-conversion stage in optical communication with the fiber assembly and situated to receive and frequency-convert an optical beam from a first wavelength to one or more second wavelengths. The fiber assembly includes: a first length of fiber comprising a first RIP formed to enable modification of the one or more beam characteristics of the optical beam by a perturbation device, and a second length of fiber having a second RIP coupled to the first length of fiber, the second RIP formed to confine at least a portion of modified beam characteristics of the optical beam within one or more confinement regions. The first RIP and the second RIP are different. 1. An optical beam delivery system , comprising: a first length of fiber comprising a first RIP formed to enable modification of the one or more beam characteristics of the optical beam by a perturbation device, and', 'a second length of fiber having a second RIP coupled to the first length of fiber, the second RIP formed to confine at least a portion of modified beam characteristics of the optical beam within one or more confinement regions,', 'wherein the first RIP and the second RIP are different; and, 'a fiber assembly situated to receive and modify one or more beam characteristics of an optical beam, wherein the fiber assembly comprises, 'an optical beam source;'}a nonlinear frequency-conversion stage in optical communication with the fiber assembly and situated to receive and frequency-convert an optical beam from a first wavelength to one or more second wavelengths.2. The optical beam delivery system of claim 1 , wherein the fiber assembly is in optical communication with the optical beam source and configured to modify one or more beam characteristics of an optical beam generated by the optical beam source.3. The optical ...

OPTICAL DEVICE AND METHOD FOR MANUFACTURING OPTICAL DEVICE

An embodiment of the invention relates to an optical device which is capable of realizing a secondary nonlinear optical phenomenon. The optical device is a fiber-type optical device which is comprised of glass containing SiO, and includes a core region, a first cladding region, and a second cladding region. At least a part of a glass region configured by the core region and the first cladding region has such a repetition structure that a first section serving as a poled crystal region and a second section serving as an amorphous region are alternately disposed along a longitudinal direction of the optical device. 1. A method for manufacturing an optical device , comprising:{'sub': '2', 'a preparation process of preparing an optical fiber comprised of glass containing SiO, the optical fiber including a core region which extends along a longitudinal direction of the optical fiber, a first cladding region which surrounds the core region and has a refractive index lower than that of the core region, and a second cladding region which surrounds the first cladding region and has a refractive index lower than that of the core region, wherein at least a part of a region constituted by the core region and the first cladding region includes a doped region containing a dopant for accelerating glass crystallization continuously provided along the longitudinal direction;'}a temperature adjusting process of maintaining a surface temperature of the optical fiber to fall within a range of 100° C. to 800° C.; anda section forming process of forming a repetition structure in the doped region by forming an electric field passing through the doped region in middle of or after an intermittent irradiation of a laser beam to the doped region of the optical fiber, the repetition structure including a first section serving as a poled crystal region and a second section serving as an amorphous region, the first section and the second section being alternately disposed and extending along the ...

OPTICAL DEVICE

0.5377×r−7.7≦V/V≦0.5377×r−5.7, 3≦r/r≦5 are satisfied, where a radius of the inner core before tapered in diameter is defined as r, a radius of the outer core before tapered in diameter is defined as r, a refractive index volume formed of a product of a cross sectional area of the inner core and a relative refractive index difference of the inner core to the cladding before tapered in diameter is defined as V, and a refractive index volume formed of a product of a cross sectional area of the outer core and a relative refractive index difference of the outer core to the cladding before tapered in diameter is defined as V. 2. The optical device according to claim 1 , wherein the radius rof the outer core before tapered in diameter is 15 μm or more.3. The optical device according to claim 1 , wherein:a length of the tapered portion is 4 mm or longer; anda length of the core after tapered in diameter is 2 mm or longer.4. The optical device according to claim 3 , wherein a length of the tapered portion is 6 mm or longer.6. The optical device according to claim 5 , wherein a coupling loss of an LPmode light beam through the multicore fiber is equal to or greater than a coupling loss of an LPmode light beam through the multicore fiber.7. The optical device according to claim 2 , wherein:a length of the tapered portion is 4 mm or longer; anda length of the core after tapered in diameter is 2 mm or longer.8. The optical device according to claim 7 , wherein a length of the tapered portion is 6 mm or longer.10. The optical device according to claim 9 , wherein a coupling loss of an LPmode light beam through the multicore fiber is equal to or greater than a coupling loss of an LPmode light beam through the multicore fiber.12. The optical device according to claim 11 , wherein a coupling loss of an LPmode light beam through the multicore fiber is equal to or greater than a coupling loss of an LPmode light beam through the multicore fiber.14. The optical device according to claim ...

BEND INSENSITIVE GRADIENT INDEX MULTI-MODE LIGHT CONDUCTING FIBER

The invention relates to a bend insensitive gradient index multi-mode light conducting fiber comprising a leakage mode dependent optical core diameter that is uniform over its length and a numerical aperture that is uniform over its length, a core (), an inner cladding (), a refraction index trench () and an outer cladding (), wherein the core () includes a core radius R an alpha-refraction index profile and a core refraction index difference dn with respect to the outer cladding (), wherein the refraction index trench () includes a refraction index trench radius R and a trench refraction index difference dn with respect to the outer cladding (), wherein the outer cladding () includes an outer cladding radius R and a refraction index between 1.40 and 1.55, wherein for a light wavelength of 850 nm and a full core excitation (OFL), the optical core diameter for a fiber length in a range between 2 m and 300 m decreases by less than 5% and the numeric aperture decreases by less than 2.5% and the bend related attenuation increase for two windings and a bend radius of 7.5 mm is less than 0.2 db. 1. A bend insensitive gradient index multi-mode light conducting fiber , comprising:a leakage mode dependent optical core diameter that is uniform over its length and a numerical aperture that is uniform over its length;a core; anda refraction index trench and an outer cladding,{'b': 1', '1, 'wherein the core includes a core radius R, an alpha-refraction index profile and a core refraction index difference dn with respect to the outer cladding,'}{'b': 3', '3, 'wherein the refraction index trench includes a refraction index trench radius R and a trench refraction index difference dn with respect to the outer cladding,'}{'b': '4', 'wherein the outer cladding includes an outer cladding radius R and a refraction index between 1.40 and 1.55,'}wherein for a light wavelength of 850 nm and an overfilled launch (OFL), the optical core diameter for a fiber length in a range between 2 m and ...

Fiber Amplifier

The present application provides an optical system. The optical system includes a fiber amplifier with an optically active doped fiber, a source of seed pulses, and a pump source. The doped fiber is doped with one or more active element(s) selected such that the seed pulses are amplified in intensity. The doped fiber has a negative (anomalous) group velocity dispersion in the region from the wavelength of the seed pulses to a threshold wavelength at which the magnitude of the optical loss of the doped fiber is greater than a gain due to stimulated Raman scattering.

SYSTEM AND METHOD FOR NON-CONTACT OPTICAL-POWER MEASUREMENT

The present invention provides methods and systems for measuring optical power that require neither alterations to the optical fiber nor physical contact with the optical fiber, the system including an optical fiber configured to propagate an optical signal, wherein the optical fiber includes a core and at least a first cladding layer, wherein a portion of the optical signal scatters out of the optical fiber along a length of the optical fiber to form scattered fiber light; a detector system configured to receive the scattered fiber light along the length of the optical fiber and to output a detection signal based on the received scattered fiber light; and a processor configured to receive the detection signal and to determine a power value of the optical signal based on the received detection signal. 1. An apparatus for measuring optical power comprising:an optical fiber configured to propagate an optical signal, wherein the optical fiber includes a core and at least a first cladding layer, wherein a portion of the optical signal scatters out of the optical fiber along a length of the optical fiber to form scattered fiber light;a detector system configured to receive the scattered fiber light along the length of the optical fiber and to output a detection signal based on the received scattered fiber light; anda processor configured to receive the detection signal and to determine a power value of the optical signal based on the received detection signal.2. The apparatus of claim 1 , wherein the first cladding layer has an index of refraction claim 1 , wherein the optical fiber further includes a second cladding layer that surrounds the first cladding layer along the length of the optical fiber claim 1 , and wherein the second cladding layer has a lower index of refraction than the index of refraction of the first cladding layer such that pump light inserted into the first cladding layer is contained within the first cladding layer along the length of the optical ...

DYNAMIC ASPECT RATIO RECTANGULAR LASER BEAMS

An optical beam delivery device includes: a first length of fiber having a first refractive index profile (RIP) to enable modification of one or more beam characteristics of an optical beam having a first beam shape; an a second length of fiber having at least one beam-shaping confinement region and situated to receive the optical beam from the first length of fiber, wherein the at least one beam shape-modifying confinement region has a quadrilateral cross-section. 1. An optical beam delivery device comprising:a first length of fiber comprising a first refractive index profile (RIP) to enable modification of one or more beam characteristics of an optical beam having a first beam shape; anda second length of fiber comprising at least one beam-shaping confinement region and situated to receive the optical beam from the first length of fiber, wherein the at least one beam shape-modifying confinement region comprises a quadrilateral cross-section.2. The optical beam delivery device of claim 2 , wherein the at least one beam shape-modifying confinement region comprises a first beam shape-modifying confinement region comprising a first quadrilateral cross-section and a second beam shape-modifying confinement region comprising a second quadrilateral cross-section.3. The optical beam delivery device of claim 1 , wherein the at least one beam shape-modifying confinement region comprises a first beam shape-modifying confinement region and a second beam shape-modifying confinement region claim 1 , wherein the first beam shape-modifying confinement region and the second beam shape-modifying confinement region differ from one another in one or more of a respective dimension claim 1 , aspect ratio or combination thereof.4. The optical beam delivery device of claim 1 , wherein the at least one beam shape-modifying confinement region comprises a first beam shape-modifying confinement region comprising the quadrilateral cross-section and a second beam shape-modifying confinement ...

MULTI-FUNCTION SEMICONDUCTOR AND ELECTRONICS PROCESSING

A method of tailoring beam characteristics of a laser beam during fabrication of an electronic device. The method includes: providing a substrate comprising one or more layers; adjusting one or more characteristics of a laser beam; and impinging the laser beam having the adjusted beam characteristics on the substrate to carry out at least one process step for fabricating the electronic device. The adjusting of the laser beam comprises: perturbing the laser beam propagating within a first length of fiber to adjust the one or more beam characteristics of the laser beam in the first length of fiber or a second length of fiber or a combination thereof, the second length of fiber having two or more confinement regions; coupling the perturbed laser beam into the second length of fiber; and emitting the laser beam having the adjusted beam characteristics from the second length of fiber. 1. A method of tailoring beam characteristics of a laser beam during fabrication of an electronic device , the method comprising:providing a substrate comprising one or more layers;adjusting one or more characteristics of a laser beam; andimpinging the laser beam having the adjusted beam characteristics on the substrate to carry out at least one process step for fabricating the electronic device, perturbing the laser beam propagating within a first length of fiber to adjust the one or more beam characteristics of the laser beam in the first length of fiber or a second length of fiber or a combination thereof, the second length of fiber having two or more confinement regions;', 'coupling the perturbed laser beam into the second length of fiber; and', 'emitting the laser beam having the adjusted beam characteristics from the second length of fiber., 'the adjusting of the laser beam comprising2. The method of claim 1 , wherein the one or more layers comprise materials chosen from electrical conductors claim 1 , electrical insulators claim 1 , semiconductors claim 1 , and combinations thereof.3 ...

Fiber coupling device

A fiber coupling device ( 100 ) includes the following components: a wedge plate ( 102 ) for receiving light and refracting the light in a predetermined direction, a condenser lens ( 104 ) for collecting the light refracted by the wedge plate ( 102 ); and an optical fiber ( 107 ) having an incident surface for receiving the light collected by the condenser lens ( 104 ). The wedge plate ( 102 ) is held rotatable around the optical axis ( 200 ) of the light incident on the wedge plate ( 102 ). The light refracted by the wedge plate ( 102 ) and collected by the condenser lens ( 104 ) is incident on a different point on the incident surface depending on the rotation angle of the wedge plate ( 102 ).

Optical device and method for manufacturing optical device

An embodiment of the invention relates to an optical device which is capable of realizing a secondary nonlinear optical phenomenon. The optical device is a fiber-type optical device which is comprised of glass containing SiO 2 , and includes a core region, a first cladding region, and a second cladding region. At least a part of a glass region configured by the core region and the first cladding region has such a repetition structure that a first section serving as a poled crystal region and a second section serving as an amorphous region are alternately disposed along a longitudinal direction of the optical device.

MULTI-CORE AMPLIFICATION OPTICAL FIBER

A multi-core amplification optical fiber includes: a plurality of core portions doped with a rare-earth element; an inner cladding portion positioned at a periphery of the plurality of core portions, having a refractive index lower than a refractive index of the plurality of core portions, in which a first hole is formed; and an outer cladding layer positioned at a periphery of the inner cladding portion, having a refractive index lower than the refractive index of the inner cladding portion. 1. A multi-core amplification optical fiber comprising:a plurality of core portions doped with a rare-earth element;an inner cladding portion positioned at a periphery of the plurality of core portions, having a refractive index lower than a refractive index of the plurality of core portions, in which a first hole is formed; andan outer cladding layer positioned at a periphery of the inner cladding portion, having a refractive index lower than the refractive index of the inner cladding portion.2. The multi-core amplification optical fiber according to claim 1 , whereinthe first hole is disposed in a region surrounded by the plurality of core portions in a cross-section of the multi-core amplification optical fiber.3. The multi-core amplification optical fiber according to claim 1 , whereinthe plurality of core portions is disposed at positions shifted from lattice points of a triangular lattice in a cross-section of the multi-core amplification optical fiber.4. A multi-core amplification optical fiber comprising:a plurality of core portions doped with a rare-earth element; anda cladding portion positioned at a periphery of the plurality of core portions, having a refractive index lower than a refractive index of the plurality of core portions, in which a first hole and a plurality of second holes disposed so as to surround the plurality of core portions and the first hole are formed.5. The multi-core amplification optical fiber according to claim 4 , whereinthe first hole is ...

MULTI-CORE FIBER

A multicore fiber includes six or more of core elements having a core, a first clad surrounding the outer circumferential surface of the core and a second clad surrounding the outer circumferential surface of the first clad, and includes a clad surrounding the core elements. All of expressions are satisfied: n>n>n, n>n, n Подробнее

MULTICORE FIBER

A multicore fiber according to the present invention includes a plurality of cores and a cladding enclosing the plurality of the cores. The plurality of the cores has two cores or greater forming a first plurality of cores linearly arranged to form a first row on one side based on a plane passed through the center axis of the cladding and three cores or greater forming a second plurality of cores arranged in parallel with the first plurality of the cores to form a second row on the other side based on the plane. The cores configuring the first plurality of the cores and the cores configuring the second plurality of the cores are disposed on lines orthogonal to the plane. 1. A multicore fiber comprising:a plurality of cores; anda cladding enclosing the plurality of the cores, wherein two cores or greater forming a first plurality of cores linearly arranged to form a first row on one side based on a plane passed trough a center axis of the cladding, and', 'three cores or greater forming a second plurality of cores arranged in parallel with the first plurality of the cores to form a second row on other side based on the plane, and, 'the plurality of the cores has'}the cores configuring the first plurality of the cores and the cores configuring the second plurality of the cores are disposed on lines orthogonal to the plane.2. The multicore fiber according to claim 1 , wherein even though attention is focused on any core among the plurality of the cores claim 1 , the plurality of the cores is disposed as the number of the cores adjacent to the core on which attention is focused at almost a same distance is two or less.3. The multicore fiber according to claim 1 , whereinat least one core or greater among the plurality of the cores is enclosed with an inner cladding layer having a refractive index lower than a refractive index of the core, andthe inner cladding layer is enclosed with a trench layer having a refractive index lower than the refractive index of the inner ...

PUMP BEAM STRIPPER AND MANUFACTURING METHOD OF THE SAME

Provided herein is a pump beam stripper including an optical fiber including a core, a primary cladding configured to surround the core, and a secondary cladding configured to surround the primary cladding, the secondary cladding including an opening that exposes a portion of the primary cladding; and an atypical glass substance deposited irregularly on a surface of the primary cladding exposed through the opening. 1. A pump beam stripper comprising:an optical fiber including a core, a primary cladding configured to surround the core, and a secondary cladding configured to surround the primary cladding, the secondary cladding including an opening that exposes a portion of the primary cladding; andan atypical glass substance deposited irregularly on a surface of the primary cladding exposed through the opening.2. The pump beam stripper according to claim 1 ,{'sub': 2', '5', '2', '2', '2, 'wherein the glass substance is a phosphate glass (PO) marble, silica glass (SiO) marble, GeO-based glass marble, or TiO-based glass marble or other composite glass marble.'}3. The pump beam stripper according to claim 1 ,wherein the glass substance comprises a rare-earth element or alkali metal or transition metal.4. The pump beam stripper according to claim 1 ,wherein a refractive index of the glass substance is the same as or greater than a refractive index of the primary cladding.5. The pump beam stripper according to claim 1 ,wherein the glass substance is a glass marble having various diameters.6. The pump beam stripper according to claim 1 ,wherein the primary cladding has a up taper structure, down taper structure, or a combination of the up taper structure and down taper structure.7. A method for manufacturing a pump beam stripper claim 1 , the method comprising:forming an optical fiber that includes a core, a primary cladding configured to surround the core, and a secondary cladding configured to surround the primary cladding, the secondary cladding including an opening ...

METHOD FOR MANUFACTURING OPTICAL FIBER PREFORM, OPTICAL FIBER PREFORM, METHOD FOR MANUFACTURING OPTICAL FIBER, AND OPTICAL FIBER

A method for manufacturing an optical fiber preform includes: producing a core preform including a core portion made of transparent glass and a first cladding layer obtained by adding fluorine to the core portion; and forming, on an outer periphery of the first cladding layer, a second cladding layer made of glass having a refractive index higher than that of the first cladding layer. Further, a refractive index profile is formed in the first cladding layer due to a fluorine concentration profile, the refractive index profile being provided at least near a boundary surface with the second cladding layer and having a profile such that a refractive index difference between a refractive index of the first cladding layer and a refractive index of the second cladding layer decreases in accordance with a reduction in a distance from the boundary surface with the second cladding layer. 1. A method for manufacturing an optical fiber preform , the method comprising:a first step of producing a core preform including a core portion made of transparent glass and a first cladding layer obtained by adding fluorine to an outer periphery of the core portion; anda second step of forming, on an outer periphery of the first cladding layer, a second cladding layer made of glass having a refractive index higher than a refractive index of the first cladding layer, whereina first refractive index profile is formed in the first cladding layer due to a fluorine concentration profile, the first refractive index profile being provided at least near a boundary surface with the second cladding layer and having a profile such that a refractive index difference between a refractive index of the first cladding layer and a refractive index of the second cladding layer decreases in accordance with a reduction in a distance from the boundary surface with the second cladding layer.2. The method for manufacturing the optical fiber preform according to claim 1 , whereinthe first step includes adding ...

ARRAY-TYPE POLARIZATION-MAINTAINING MULTI-CORE FIBER

An array-type polarization-maintaining multi-core fiber includes a main outer cladding, fiber core units, and stress units. The fiber core units and the stress units are arranged to form a unit array including one central unit and any unit in the unit array being equidistantly arranged from adjacent units thereof. Provided is at least one pair of stress units, each pair of stress units being arranged symmetrical about one fiber core unit to form a polarization-maintaining fiber core unit. The fiber core units each include a fiber core and an inner cladding surrounding a core layer. A portion outside the fiber core units and the stress units is the main outer cladding. The fiber can greatly enhance spectral efficiency of an optical transmission system, and improve fiber communication capacity. 1. An array-type polarization-maintaining multi-core fiber , including a main outer cladding and fiber core units , and further including stress units , wherein the fiber core units and the stress units are arranged to form a unit array , the unit array including one central unit and any unit in the unit array being equidistantly arranged from adjacent units thereof; provided is at least one pair of stress units , each pair of stress units being arranged symmetrical about one fiber core unit to form a polarization-maintaining fiber core unit; and the fiber core units each include a fiber core and an inner cladding surrounding a core layer , and a portion outside the fiber core units and the stress units is the main outer cladding.2. The array-type polarization-maintaining multi-core fiber according to claim 1 , wherein the central unit is a fiber core unit claim 1 , and stress units are symmetrically arranged on adjacent two sides of the fiber core unit as the central unit to form a central polarization-maintaining fiber core unit.3. The array-type polarization-maintaining multi-core fiber according to claim 1 , wherein a distance between the adjacent units is 20-60 μm.4. The ...

OPTICAL FIBER CABLE, HARNESS, AND METHOD OF MANUFACTURING OPTICAL FIBER CABLE

An optical fiber cable comprising an optical fiber, and a jacketing layer including at least two or more layers of a jacketing inner layer and a jacketing outer layer formed in this order concentrically, wherein the jacketing layer comprises at least two or more layers of a jacketing inner layer and a jacketing outer layer formed in this order concentrically; a material constituting the jacketing inner layer is composed of a resin material having an oxygen permeability of 2.0 cc·20 μm/(m·day·atm) or less; a material constituting the jacketing outer layer comprises at least one selected from a polyolefin-based resin, a polybutylene terephthalate-based resin, and a fluorine-based resin containing no chlorine atom in its structure; and the following general formula (i) and (ii) are satisfied when an outer diameter of the optical fiber is denoted by A (μm), an outer diameter of the optical fiber cable is denoted by B (μm), and a thickness of the jacketing outer layer is denoted by c (μm): 1. An optical fiber cable comprising an optical fiber and a jacketing layer formed on the outer periphery of the optical fiber ,wherein the jacketing layer comprises at least two or more layers of a jacketing inner layer and a jacketing outer layer formed in this order concentrically;{'sup': '2', 'a material constituting the jacketing inner layer is composed of a resin material having an oxygen permeability of 2.0 cc·20 μm/(m·day·atm) or less;'}a material constituting the jacketing outer layer comprises at least one selected from a polyolefin-based resin, a polybutylene terephthalate-based resin, and a fluorine-based resin containing no chlorine atom in its structure; and [{'br': None, 'i': 'A≤', '900≤1100\u2003\u2003(i)'}, {'br': None, 'i': c', 'B−A, '0.40≤2×/()≤0.70\u2003\u2003(ii).'}], 'the following general formula (i) and (ii) are satisfied when an outer diameter of the optical fiber is denoted by A (μm), an outer diameter of the optical fiber cable is denoted by B (μm), and a ...

Multicore optical fiber with integral diffractive elements machined by ultrafast laser direct writing

A multicore optical fiber with an integral diffractive element. The multicore optical fiber includes: a first optical fiber core formed of a non-photosensitive material having an initial index of refraction; and a second optical fiber core including a second longitudinal core axis substantially parallel to the first longitudinal axis. The first optical fiber core includes: a first longitudinal core axis; and a number of index-altered portions having an altered index of refraction which is different from the initial index of refraction. The index-altered portions are arranged within the non-photosensitive material of the first optical fiber core to form a diffractive structure of the integral diffractive element.

光纤和用于制造低偏振模色散和低衰减光纤的方法

一种光纤制造方法,它包括以下步骤,提供具有纵向延伸中线孔的圆柱形玻璃光纤预制件,和在合适的情况下封闭该孔,以得到均匀和对称的孔的封口。该方法可以包括首先封住中线孔的第一端和第二端,以防止气体从它中间流过。较佳的是该方法包括通过将预制件拉丝成光纤以封闭预制件的中线孔。

色散控制光纤及其大尺寸预制坯的制造方法

色散控制光纤和大尺寸预制坯的制造方法。该色散控制光纤包括纤芯和包层,该纤芯由SiO 2 、GeO 2 和P 2 O 5 构成,该包层由SiO 2 、GeO 2 、P 2 O 5 和氟利昂构成。选择P 2 O 5 的含量不超过构成该纤芯复合物总重量的10%。用于MCVD法色散控制光纤的大尺寸预制坯的制造方法包括,在沉积管的内周边沉积SiO 2 、GeO 2 、P 2 O 5 和氟利昂以便形成包层,并且在该包层的内周边上沉积SiO 2 、GeO 2 和P 2 O 5 以便形成纤芯层。

一种少模光纤及制备方法

本发明实施例公开了一种少模光纤及制备方法，其中，该少模光纤包括：内芯、环绕所述内芯的环芯、包裹所述环芯的包层以及包裹所述包层的涂敷层；其中，所述环芯的折射率大于所述包层的折射率；所述包层的折射率大于所述内芯的折射率；所述内芯的折射率基于各矢量模式间有效折射率差随内芯折射率的变化规律进行确定；所述内芯的半径基于各矢量模式间有效折射率差随内芯半径的变化规律进行确定。本发明实施例提供的技术方案，结构简单，可以有效产生稳定的低阶矢量模式，可以克服普通少模光纤矢量模式高串扰的缺点。

Bending insensitive single mode optical fibre

일종의 벤딩에 민감하지 않은 단일모드 광섬유는 코어와 클래딩을 포함하며, 코어 직경은 7~7.9미크론이고, 코어의 상대굴절률차이Δ 1 는 4.6×10 -3 ~6.5×10 -3 이며, 코어 외측의 클래딩은 안에서 밖으로 순서대로 내부 클래딩, 함몰 외부 클래딩과 외부 클래딩이다. 내부클래딩의 직경은 16.5~20미크론이고, 내부클래딩의 상대굴절률차이Δ 2 는 -3×10 -4 ~3×10 -4 이다. 함몰 외부 클래딩의 직경은 33~40미크론이고, 함몰 외부 클래딩의 상대굴절률차이Δ 3 는 -2.9×10 -3 ~-7.3×10 -3 이며, 또한 상대굴절률차이Δ 3 는 기울기 변화를 나타내어 밖에서 안으로 점차 커지며, 최외측 계면 부위의 상대 굴절률 차이Δ 32 는 최내측 계면 부위의 상대 굴절률 차이Δ 31 보다 작다. 본 벤딩에 민감하지 않은 단일모드 광섬유는 광섬유 단면의 최적화를 통해 더욱 낮은 벤딩 부가 손실, 안정적인 기계성능과 균일한 재료 조성을 가질 뿐만 아니라, 유효 모드필드 직경과 벤딩 성능의 유지를 기초로 광섬유 내부 클래딩과 함몰 외부 클래딩의 직경을 감소시킬 수 있으며, 나아가 광섬유의 제조 원가를 낮출 수 있다. Single-mode optical fibers that are not susceptible to some bending include a core and a cladding, the core diameter is 7 to 7.9 microns, the relative refractive index difference? 1 of the core is 4.6 × 10 -3 to 6.5 × 10 -3 , The cladding is an inner cladding, a recessed outer cladding and an outer cladding in order out of the inside. The diameter of the inner cladding is 16.5 to 20 microns, and the relative refractive index difference? 2 of the inner cladding is -3 × 10 -4 to 3 × 10 -4 . The outer cladding diameter of the outer cladding is 33 to 40 microns and the relative refractive index difference Δ 3 of the outer cladding of the recess is -2.9 × 10 -3 to -7.3 × 10 -3 . Also, the relative refractive index difference Δ 3 shows a slope change, And the relative refractive index difference? 32 of the outermost interfacial region is smaller than the relative refractive index difference? 31 of the innermost interfacial region. The single-mode fiber, which is not sensitive to this bending, has a lower bending loss, stable mechanical performance and uniform material composition through the optimization of the optical fiber cross section, as well as maintaining the effective mode field diameter and bending performance, The diameter of the external cladding of the recess can be reduced, and the production cost of the optical fiber can be further reduced.

A kind of doubly clad optical fiber

本发明公开了一种双包层光纤，由内向外依次包括纤芯、内包层、外包层和保护层，所述的内包层和外包层的折射率由纤芯到保护层方向逐渐降低，所述纤芯的折射率大于内包层的最大折射率，所述内包层的折射率大于外包层的最大折射率，通过将光纤的内包层和外包层都设置成折射率渐变的形式，且内包层内周面至外包层外周面的折射率呈函数渐变递减关系，通过该方案能够充分避免螺旋光效应，大大提高了泵浦效率。

Optical System And Method Having Low Loss And Non-Linear Effects

본 발명은 광 신호를 전송하기 위한 장치와 방법으로, 싱글모드 파이버의 제1경간(16)과 제2경간(18)을 가지는 전송선로에 지향되어 있다. 제1경간의 파이버는 동작파장에서 약 2.5ps/nm/km와 10ps/nm/km사이의 절대값을 가지는 네가티브 분산을 가진다. 제2경간(18)은 제1경간(16)에 접속되고 동작 주파수에서 포지티브 분산을 가진다. 제2경간의 포지티브 분산은 제1 및 제2경간에 걸쳐서의 누적분산이 약 제로가 되게 제1경간의 네가티브 분산을 보상한다. 제1경간의 증가되는 분산은 비-선형 효과를 더 낮게 하는 특성에 부합되고 제2경간의 길이를 더 길게 허용하며 전송선로에 있어서 감쇠를 더욱 낮게 되도록 도와준다.

Bent insensitive single-mode optical fiber

本发明涉及一种弯曲不敏感单模光纤，包括有芯层和包层，芯层直径为7～7.9微米，芯层相对折射率差Δ 1 为4.6×10 -3 ～6.5×10 -3 ，芯层外的包层从内到外依次为内包层、下陷外包层和外包层，内包层直径为16.5～20微米，内包层相对折射率差Δ 2 为-3×10 -4 ～3×10 -4 ，下陷外包层直径为33～40微米，下陷外包层相对折射率差Δ 3 为-2.9×10 -3 ～-7.3×10 -3 ，且相对折射率差Δ 3 呈梯度变化，从外至内逐渐增大，最外界面处相对折射率差Δ 32 小于最内界面处相对折射率差Δ 31 。本发明通过优化光纤剖面，不仅具有更低的弯曲附加损耗，稳定的机械性能和均匀的材料组成，而且能在保持有效模场直径和弯曲性能的基础上，减小光纤内包层和下陷外包层的直径，从而降低光纤的制造成本。

Continuous fiber fabrication process

A method of forming optical fibers in a continuous manufacturing process employs a heated mandrel with a predetermined taper at one end. Glass forming materials are applied to the mandrel by chemical vapor deposition along the taper to provide a corresponding glass concentration gradient along the taper. The molten glass materials are drawn in a continuous process without an intermediate preform stage.

Optical fiber preform, optical fiber manufacturing method, and optical fiber

Endoscopic imaging probe comprising dual clad fibre

A low attenuation optical fiber and its producing method in MCVD

本发明披露了一种低衰减光纤及其在MCVD中的制造方法，所述光纤为低衰减单模光纤，所述光纤具有光电导芯和包层，并且在MFD(模场直径)区内显示出非常低的OH浓度。所述光纤包括配置在其中心用于光电导的芯，和依次被覆于所述芯上的脱水包层和基体包层。脱水包层的折射率与基体包层的折射率基本相同。芯的折射率比脱水包层和基体包层的折射率大。脱水包层与基体包层相比具有相对较低的OH浓度。由芯和脱水包层构成的区域具有OH浓度小于0.8ppb的MFD区。

Imaging system and related techniques

A method and apparatus for imaging using a double-clad fiber is described.

Optical device and optical device manufacturing method

Provided is an optical device whose resin member is less likely to reach a high temperature, as compared with that of a conventional optical device. The optical device ( 1 ) includes (i) an optical fiber ( 11 ) in which a jacket-removed section (I 1 ) is provided and (ii) a resin member ( 12 ) in which the jacket-removed section (I 1 ) is embedded. The jacket-removed section (I 1 ) is a section in which a part of a jacket ( 112 ) covering an outer surface of a cladding ( 111 b ) is removed so that only a part of the outer surface of the cladding ( 111 b ) is exposed in a cross section of the optical fiber ( 11 ).

FIBER OPTICAL SILICA WITH DOUBLE POLYMER SHEATH

Method and apparatus for producing crystalline cladding and crystalline core optical fibers

We provide methods and apparatus for preparing crystalline-clad and crystalline core optical fibers with minimal or no breakage by minimizing the influence of thermal stress during a liquid phase epitaxy (LPE) process as well as the fiber with precisely controlled number of modes propagated in the crystalline cladding and crystalline core fiber via precisely controlling the diameter of crystalline fiber core with under-saturated LPE flux. The resulting crystalline cladding and crystalline core optical fibers are also reported.

Feedback stabilized multi-mode and method of stabilizing a multi-mode laser

The laser assembly (10) comprises a multimode laser (12) having at least one output and operating at a given wavelength. It also includes a double-clad optical fiber (20) having a free end (22) coupled to the output of the laser (12). The optical fiber (20) comprises a core (24) in registry with the outp ut of the laser (12), a multimode inner cladding (26) surrounding the core (24) , and an outer cladding (28) surrounding the inner cladding (26), the outer cladding (28) being provided to contain light in the inner cladding (26). A fiber Bragg grating (30) is written in the core (24) of the fiber (20) at a given distance from the free end (22) thereof. The Bragg grating (30) has a reflection spectrum within the gain spectrum of the laser (12). In use, it generates a sufficient feedback and stabilizes the laser (12) at the reflection spectrum of the Bragg grating (30). This provides a low cost lase r assembly that is simple, suitable for volume manufacturing and small in size .

Optical fiber and fiber optical active device

Silica glass single-mode optical fibre and its production method

METHOD FOR MANUFACTURING HIGH RESISTANCE PREFORM AND OPTICAL FIBERS

Cladding-pumped fiber structures

A cladding-pumped fiber structure is disclosed in which mode mixing of pump light injected into the fiber is induced by index modulation. In one embodiment, the index modulation is created by a stress-inducing region disposed in the cladding which simultaneously maintains the polarization within the core to produce a polarization-maintaining fiber useful for multi-mode and laser applications.

Optical fiber sensor with localized sensing regions

A coupling mechanism for a non-identical dual core optical fiber. The fiber is sensitized along selected portions of its length by coating the fiber in a pattern of bands of specified spacing with material that is sensitive to the presence of a predetermined parameter or environmental field. By virtue of inequality of propagation properties and mismatch of optical phase of the fields of the two cores, evanescent wave coupling is largely or wholly suppressed except in those portions of length coated in the specified spatially periodic manner. Optical power launched into one of the two cores remains propagating within that core alone over an extended length of the fiber, except for that period of time when the predetermined parameter or environmental field is sensed. The specific spatial periodicity of the pattern of coating bands on the outside of the fiber acts in concert with the nonidentical propagation parameters of the two cores to effect intercore coupling of optical energy. This coupling, representing sensitivity to any environmental field which causes strain in the coating, is effective only on those portions of the dual core fiber length which bear a specific coating pattern.

optical fiber with higher mechanical strength.

patente de invenção para: fibra óptica com maior resistência mecânica. trata-se de uma fibra óptica com maior resistência mecânica. a fibra óptica inclui uma camada de revestimento externo com uma tensão compressiva de ao menos 100 mpa. Patent for: Optical fiber with higher mechanical strength. It is an optical fiber with greater mechanical resistance. The optical fiber includes an outer sheath layer with a compressive stress of at least 100 mpa.

Continuous production method of optical fiber

Integrated optical waveguide evanescent field sensor

Integrated optical waveguide evanescent field sensor for sensing of chemical and/or physical quantities, comprising a substrate carrying a waveguide layer structure provided with - a waveguide core layer (3) sandwiched between two cladding layers (4, 5) formed by a lower (4) and a upper cladding layer (5), of a lower refractive index than the waveguide core layer, - a sensing section comprising a sensing layer (10) included in the upper cladding layer, wherein said sensing layer is exchangeable as a separate element.

Power over fiber system and optical fiber cable

A power over fiber system includes an optical fiber cable. The optical fiber cable includes a core, a first cladding and a second cladding. The core transmits signal light. The first cladding is positioned in contact with periphery of the core and transmits feed light. The second cladding is positioned in contact with periphery of the first cladding. Radial refractive index distribution of the first cladding is distribution in which refractive index gradually decreases from a local maximum at an internal point toward points where the first cladding is in contact with the core and the second cladding, respectively. The internal point is away from the core and the second cladding. The refractive index of the core is higher than the refractive index of the first cladding at the point where the first cladding is in contact with the core.

Large effective area fiber

本发明公开了一种大有效面积光纤，由中心向外依次设有：芯层、一内包层及一外包层，其中芯层及内包层以二氧化硅作为基底材料并掺入掺杂剂，外包层为纯二氧化硅层，芯层半径为4.5～6.5μm，且芯层的相对折射率差Δ 1 为0.23％～0.35％；内包层半径为16.0～32.5μm，且内包层的相对折射率差Δ 2 为(‑0.09％)～(‑0.02％)，芯层和内包层粘度对数的差值的绝对值不大于0.105。本发明的光纤以一种简单的结构和较低的成本实现芯层与内包层粘度的匹配，芯层和内包层粘度对数的差值的绝对值不大于0.105。

Method and apparatus for fabrication of metal-coated optical fiber, and the resulting optical fiber

Method and apparatus for producing metal-coated optical fiber involves providing a length of optical fiber having a glass fiber with or without a carbon layer surrounded by a liquid-soluble polymeric coating. The optical fiber is passed through a series of solution baths such that the fiber will contact the solution in each bath for a predetermined dwell time, the series of solution baths effecting removal of the polymer coating and subsequent electroless plating of metal on the glass fiber. The optical fiber is collected after metal plating so that a selected quantity of the metal-coated optical fiber is gathered, Preferably, the glass fiber passes through the series of solution baths without contacting anything except for the respective solution in each.

A chiral optical waveguide

An optical waveguide comprises a core (20;30) and is characterised in that the core (20;30) has a refractive index that includes a radial discontinuity (50;55) and varies, with increasing azimuthal angle θ, from a first value n 2 at a first side of the discontinuity (50;55) to a second value n 1 at a second side of the discontinuity (50;55).

DEVICE FOR EMITTING LIGHT USING AN OPTICAL FIBER, AND METHOD FOR IMPLEMENTING SAID DEVICE.

Hollow anti-resonance optical fiber with core shift structure

本发明公开了一种偏芯结构的空芯反谐振光纤，属于光学与激光光电子技术领域。该光纤通过左右非对称型包层结构设计，大大降低了光纤的弯曲损耗同时改善了光纤单模传输特性。本发明的光纤相比于传统全内反射型和对称型空芯反谐振光纤，具有低弯曲损耗、准单模传输、宽传输光谱、低色散、高损伤阈值等优点。仿真与实验证明，与传统单圈无节点型空芯反谐振光纤相比，在小弯曲半径下其弯曲损耗降低一个数量级。同时仿真与CCD成像也证明其具有较好的准单模传输特性。本发明在光纤传感、光纤气体激光器和大功率超短脉冲激光传输中有着巨大应用前景。

Silica optical fibre with polymer double cladding

Side-illumination type optical fiber

A side light type optical fiber, includes a core and a cladding disposed around the core, the cladding including a transparent first layer contacting the core, and a light diffusive second layer formed around the first layer, the layers being integrally molded.

Optical quartz glass fiber with double polymer sheath

Single mode optical fibre, and method for the manufacture of a single mode optical fibre

본 발명은 광전도 코어부(4), 이 코어부(4)를 피복하는 내부 클래딩부(3), 이 내부 클래딩부(3)를 피복하는 자켓부(1)를 구비하고, 코어부의 굴절률은 클래딩부와 자켓부 영역의 굴절률 보다 크며, 클래딩부와 자켓부 영역의 굴절률은 실제적으로 동일한 단일 모드 광섬유의 제조 방법에 관한 것이다. The present invention includes a photoconductive core portion 4, an inner cladding portion 3 covering the core portion 4, a jacket portion 1 covering the inner cladding portion 3, and the refractive index of the core portion is The refractive index of the cladding portion and the jacket portion region is larger than that of the cladding portion and the jacket portion region, and the refractive index of the cladding portion and the jacket portion region is about the same.

Procedure for Manufacturing a Bundle of Optical Fibers

Light-diffusing optical fiber having nanostructured inner and outer core regions

A light-diffusing optical fiber having nanostructured inner and outer core regions is disclosed. The nanostructured inner core region is defined by a first configuration of voids that defines a first amount of light scattering. The outer core region is defined by a second configuration of voids that defines a second amount of light scattering that is different from the first amount of light scattering. A cladding surrounds the nanostructured core. Light scattered out of the inner core region scatters from the outer core region and then out of the cladding as scattered light. Selective bending of the light-diffusing optical fiber is used to define a bending configuration that allows for tailoring the intensity distribution of the scattered light emitted from the fiber as a function of the length of the fiber.

Optical fiber sensor with localized sensing regions

ABSTRACT OF THE DISCLOSURE A coupling mechanism for a non-identical dual core optical fiber. The fiber is sensitized along selected portions of its length by coating the fiber in a pattern of bands of specified spacing with material that is sensitive to the presence of a predetermined parameter or environmental field. By virtue of inequality of propagation properties and mismatch of optical phase of the fields of the two cores, evanescent wave coupling is largely or wholly suppressed except in those portions of length coated in the specified spatially periodic manner. Optical power launched into one of the two cores remains propagating within that core alone over an extended length of the fiber, except for that period of time when the predetermined parameter or environmental field is sensed. The specific spatial periodicity of the pattern of coating bands on the outside of the fiber acts in concert with the nonidentical propagation parameters of the two cores to effect intercore coupling of optical energy. This coupling, representing sensitivity to any environmental field which causes strain in the coating, is effective only on those portions of the dual core fiber length which bear a specific coating pattern.

Side-illumination type optical fiber

A side light type optical fiber, includes a core and a cladding disposed around the core, the cladding including a transparent first layer contacting the core, and a light diffusive second layer formed around the first layer, the layers being integrally molded.

OPTICAL FIBER

FIBRA ÓTICA. A presente invenção refere-se a uma fibra ótica que inclui um núcleo, um revestimento interno que envolve o núcleo, e um revestimento externo que envolve o revestimento interno. Uma diferença média de índice de refração relativa ?1 do núcleo em relação à sílica pura, uma diferença média de índice de refração relativa ?2 do revestimento interno em relação à sílica pura, e uma diferença média de índice de refração relativa ?3 do revestimento externo em relação à sílica pura satisfazem uma relação de ?1 >?3 =?2. A relação r2/r1 de um raio de revestimento interno r2 para um raio de núcleo r1 é de 4,5 ou superior e 5,5 ou inferior. Um valor mínimo ?mín de uma diferença relativa de índice de refração com respeito à sílica pura é -0,030% ou superior e -0,010% ou inferior. Um raio rmín em que a diferença relativa do índice de refração é o valor mínimo ¿mín satisfaz uma relação de r1 < rmín < r2. (?-? (r1))/(rmín-r1) é -0,002%/µm ou inferior, onde ?(r1) denota a diferença relativa do índice de refração com o raio do núcleo r1.

Optical Fiber with Increased Mechanical Strength

An optical fiber having increased mechanical strength is provided. The optical fiber includes an over cladding layer that has a compressive stress of at least 100 MPa.

Optical waveguide fiber and manufacturing method thereof

본 발명은 광도파관 섬유 및 이의 제조방법에 관한 것으로, 좀 더 상세하게는, 코아부 (1) , 및 외곽 클래 딩층(3)을 포함하는 클래 딩부(2)를 가지며, 상기 외곽 클래딩층 (3)은 섬유 인발공정으로 인한 섬유 파괴수를 실질적으로 감소시킬 수 있도록 굉장히 얇은 두께(1㎛이하 두께)를 가지며 악 100wt%와 동일하거나 또는 그 이하의 미리 결정된 TiO₂농도를 가지는 TiO₂-SiO₂유리층으로 구성되어 있다.

Device for converting the transverse spatial profile of intensity of a light beam, preferably using a microstructured optical fibre

一种优选使用微结构光纤的用于改变光束的强度的横向空间轮廓的装置。在此装置中，光纤(10)的横向尺寸纵向地变化并且光纤的端部(12、14)具有被设计为使得光纤在光束的波长上具有在两个端部具有不同轮廓形状的基模的光学几何参数。因此通过通过两个端部中的一个引入具有其中一种轮廓的波束(24)，波束通过另一个端部以与引入波束的轮廓形状不同形状的另一个轮廓出射。

Fibre-optical light-emitting device and method for using same

A light-emitting device including a light source (3) placed at the end of an optical fibre. The fibre's sheath comprises defined areas (4, 6, 8, 10, 12) of concentrated and deliberately added impurities, which areas are formed using conventional microelectronics doping processes such as diffusion and ion implantation allowing the refractive index to be varied in said areas so that said index, which is different in each area, is higher than that of the core, whereby an optical filter is formed through which light of a single colour escapes in a controlled manner. The device is designed for luminescent textiles and all kinds of luminous accessories, and is also applicable to computer screens and other visual interfaces.

Chiral optical fiber

Imaging system and related techniques

A method and apparatus for imaging using a double-clad fiber is described.

A kind of hollow antiresonance optical fiber of multi-resonant layer

本发明提供一种多谐振层的空芯反谐振光纤，包括低折射率的纤芯区域和高折射率的包层区域，所述高折射率的包层区域包括内包层区和外包层区域，所述外包层区域包覆内包层区域和纤芯区域，所述内包层区域包括第一反谐振层和第二反谐振层，且所述第一反谐振层和第二反谐振层包围纤芯区域；所述第一反谐振层包括若干层微毛细管，所述第二反谐振层支撑所述第一反谐振层。采用双包层结构，通过两层及以上的反谐振层，理论仿真上损耗能降低至0.1dB/km，具有超低传输损耗、光谱带宽宽、弯曲损耗小、传输损耗低、损伤阈值高和保持单模传输的特点。

Single mode optical fibre and producing method thereof

一种光纤可通过在包括芯部(1)和第一复层(2)的玻璃棒外面气相沉积SiO 2 ，和拉伸通过第二复层(3)形成的玻璃预制棒来形成。制造单模光纤使第一复层部分的直径D和芯部的直径d的比在4.0到8.0的范围，OH的浓度是0.1ppm或更小。还制造一种光纤使其D/d的比值大于4.8，其OH的浓度是0.1ppm或更小。因此，即使出现氢扩散，仍可以保持1380nm波长范围的初损耗。

Super-large mode field low-numerical aperture metal coating gain optical fiber and manufacturing method thereof

本发明公开了一种超大模场低数值孔径金属涂覆层增益光纤，所述增益光纤由内到外依次包括纤芯、内包层、第三包层和涂覆层，所述内包层为石英包层，所述第三包层为掺氟石英包层，所述涂覆层为金属涂覆层。本发明在现有光纤激光器结构的设计框架下，对激光器中的关键器件高功率增益光纤开展改进的设计，优化了高功率增益光纤的纤芯半径、内包层半径、纤芯数值孔径、内包层吸收系数、光纤长度和使用中不弯曲盘绕的方式，改变了光纤涂覆层材料和涂覆方式，提升高功率窄线宽光纤激光器的受激布里渊阈值和模式不稳定阈值。

Optical fiber capable of transmitting double light beams and coupling method thereof

本发明公开了一种可传输双光束的光纤及其耦合方法，该光纤包括第一纤芯、第一包层、第二纤芯、第二包层、涂覆层，所述第一纤芯外侧设置有所述第一包层，所述第一包层外侧设置有所述第二纤芯，所述第二纤芯外侧设置有第二包层，所述第二包层外侧设置有涂覆层，所述第一纤芯为圆形纤芯，输出圆形光斑，所述第二纤芯为环形纤芯，形成环形光斑，所述第一纤芯和所述第二纤芯的折射率分别高于所述第一包层和所述第二包层的折射率，圆形光束和环形光束分别在所述第一纤芯和所述第二纤芯中进行传输。本发明实现双光束传输和耦合，对于拓展光纤激光的应用具有重要意义。

Patent JPS5838370B2

Method of making a twisted optical fiber with low polarisation mode dispersion

A method of manufacturing an optical fiber, whereby a fiber is drawn from a molten extremity of a preform and is subsequently subjected to a torque, thereby causing a portion of the fiber to be twisted about its longitudinal axis and to be endowed with a spin. The torque is applied by running the fiber between a pair of wheels which rotate in mutually opposite senses about two different rotational axes, each wheel having a peripheral curved surface, the wheels being thus arranged that the fiber runs substantially tangential to their curved surfaces and is pressed therebetween, the wheels being moved back and forth relative to one another in a direction substantially perpendicular to the fiber so as to cause the fiber to be rolled back and forth between their curved surfaces.

Low decay single-mode fiber and preparation method thereof

本发明涉及一种低衰减单模光纤及其制备方法，包括有芯层和包层，其特征在于所述的芯层半径r1为3.5～4.0μm，相对折射率差△1为0.33～0.36％，芯层外从内向外依次包覆内包层和外包层，所述的内包层半径r2为12～14μm，相对折射率差△2为‑0.01～0.01％，所述的外包层半径r3为62～63μm，所述的外包层为纯二氧化硅玻璃层。通过VAD工艺制造芯棒得到芯层掺锗和氯、内包层掺氟和氯的玻璃芯棒，将此芯棒套入纯二氧化硅外套管，或通过OVD工艺在此芯棒外面沉积外包层，得到可供拉丝的预制棒，将此预制棒在1500～3300m/min的拉丝速度下进行拉丝形成光纤。本发明通过掺氯减少芯层掺锗量和改善芯包层粘度匹配实现光纤的低衰减，该光纤制备工艺较为简单，制作成本低，且工艺稳定，产出合格率高。

Tapered core fiber manufacturing methods

Tapered core fibers are produced using tapered core rods that can be etched or ground so that a fiber cladding has a constant diameter. The tapered core can be an actively doped core, or a passive core. One or more sleeving tubes can be collapsed onto a tapered core rod and exterior portions of the collapsed sleeving tubes can be ground to provide a constant cladding diameter in a fiber drawn from the preform.

Manufacturing method of optical fiber base material and manufacturing method of optical fiber base material and optical fiber and optical fiber

光ファイバの低損失化を実現することを目的として、光ファイバ母材の製造方法は、透明ガラスからなるコア部の外周にフッ素を添加した第１クラッド層を備えるコア母材を作製する第１工程と、第１クラッド層の外周に、第１クラッド層よりも屈折率が高いガラスからなる第２クラッド層を形成する第２工程と、を含み、第１クラッド層は、第２クラッド層との境界面の少なくとも近傍において、第２クラッド層との境界面に対する距離が小さくなるに従って、第１クラッド層の屈折率と第２クラッド層の屈折率との屈折率差が小さくなる形状の第１屈折率分布形状をフッ素濃度の分布によって形成する。 For the purpose of realizing low loss of the optical fiber, the method for manufacturing the optical fiber base material is a first method of producing a core base material having a first clad layer in which fluorine is added to the outer periphery of a core portion made of transparent glass. A step and a second step of forming a second clad layer made of glass having a refractive index higher than that of the first clad layer on the outer periphery of the first clad layer are included, and the first clad layer is a second clad layer. The first shape has a shape in which the difference in refractive index between the refractive index of the first clad layer and the refractive index of the second clad layer decreases as the distance from the interface with the second clad layer decreases at least in the vicinity of the boundary surface of the first clad layer. The refractive index distribution shape is formed by the distribution of the fluorine concentration.

Optical coupler comprising multimode fibers and method of making the same

An optical coupler is provided. It has a bundle of multimode fibers with a few-mode fiber in its centre. Such bundle is fused at one end which is the output end for the signal that is transmitted by the few-mode fiber. To make the coupler, this output end of the bundle is aligned and spliced with a large area core double clad fiber while preserving the modal content of the feed-through. A method for making such optical coupler is also provided. It includes the steps of bundling a central few-mode fiber with a plurality of multimode fibers and then fusing one end of such bundle and aligning it and splicing with a large core double clad fiber, while preserving fundamental mode transmission from one to the other.

Optical system and method having low loss and non-linear effects

A single mode optical transmission fiber having a core and a cladding comprises an inner core and a first glass layer. The inner core has a first refractive-index difference. The first glass layer surrounds the inner core and has a second refractive-index difference. The fiber has a cabled cutoff wavelength of less than about 1500 nm.