Dispersion manipulating fibre

Optical fibre and methods of supplying light to optical fibres

Dispersion manipulating fibre

Improvements in and relating to photonic-crystal fibres and photonic-crystal fibre devices

Multicore fiber

Archimedean-lattice microstructured optical fiber

A microstructured optical fiber exhibiting enhanced circularity of the guided light mode is provided. The microstructured optical fiber includes a light-guiding core and a primary cladding surrounding the core wherein the primary cladding has a plurality of holes arranged in hexagonal unit cells defining an Archimedean-like lattice. Preferably, the core is defined by a break in a center of the Archimedean-like lattice, the break being characterised by an absence of at least one of the unit cells. Also preferably, each of the unit cells has seven holes arranged in a centred hexagon. A method of making the microstructured optical fiber is also provided. The method includes fabricating a fiber preform by stacking a plurality of canes around a rod, each cane having a number of holes arranged in a unit cell defining an Archimedean-like lattice, and drawing said fiber preform into the microstructured optical fiber.

NOVEL PHOTONIC BANDGAP FIBRE, AND USE THEREOF

An object of the present invention is to provide new designs of microstructured optical fibres that may be fabricated without use of voids, such as fibres being realized using silica and silica doping techniques. The invention relates to a mircrostructured optical fibre that guides light in a core region (52), where the fibre has a cladding region that comprises a background material (51) and a number of cladding features or elements (50) that are elongated in the longitudinal direction of the fibre and have a higher refractive index than the cladding background material. The core region has a lower effective refractive index than the cladding, and the fibre may guide light in the core by photonic bandgap effects. The present invention provides designs of photonic bandgap fibres that may operate without the use of voids in the cladding, thereby simplifiying fabrication of photonic bandgap fibres compared to prior art. The invention further provides photonic bandgap fibers with tuneable ...

PHOTONIC BANDGAP FIBER

A photonic bandgap optical fiber and a method of manufacturing said fiber is disclosed. The photonic bandgap fiber comprises a core region surrounded by cladding region. The cladding region includes a background optical material having a first refractive index, and elements of optical material having a second refractive index higher than said first refractive index. The elements are arranges periodically in the background optical material. At the drawing temperature of the fibered, the background optical material has a viscosity lower than the viscosity of the optical material of the elements.

Optical power delivery system

An optical transmission system comprising a laser light source arranged to emit light having a frequency ω; and an optical transmission line adapted to guide the light, wherein said optical transmission line includes a photonic bandgap optical fibre having a core guided mode at frequency ω and an attenuation band at a frequency of ω-13 THz. The optical transmission system suppresses Raman scattered light thereby allowing high optical powers to be transmitted through optical fibre.

PHOTONIC CRYSTAL FIBRE

PHOTONIC BAND GAP FIBER

A photonic band gap fiber comprising a first core having a refractive index up to that of a clad, a second core provided to surround the first core and having a refractive index lower than that of the first core, a clad surrounding the second core, and a periodic structure portion that includes a high refractive index portion having a refractive index higher than that of the clad and formed in a periodic structure and is provided in proximity to the second core of the clad. In the periodic structure, propagation constant of the basic mode of at least working wavelength exists in the photonic band gap, and propagation constant of the high order mode of working wavelength exists on the outside of the photonic band gap.

Optical fibre

Microstructured optic fibre with inner and outer claddings

Hollow-core photonic bandgap fibers

FIBER WITH PHOTONI BAND GAP

IMPROVEMENTS IN AND RELATING TO PHOTONIC-CRYSTAL FIBRES AND PHOTONIC-CRYSTAL FIBRE DEVICES

A photonic-crystal fibre comprising: a core (20) having a first refractive index; and a cladding region (10) at least substantially surrounding the core (20) and comprising a bulk material having a second refractive index that is higher than the first refractive index, the bulk material containing an arrangement of elongate, longitudinal holes that comprise hole material of a third refractive index that is lower than the first refractive index; such that an electromagnetic mode guided in the core (20) has an evanescent wave that becomes more closely confined to the vicinity of the core (20) as the wavelength of the electromagnetic mode is increased over a first range of wavelengths.

Photonic-crystal fibers and photonic-crystal fiber devices

A photonic crystal fiber comprising: a core ( 20 ) having a refractive index; and a cladding region ( 10 ) at least substantially surrounding the core ( 20 ) and comprising a bulk material having a second refractive index that is higher that the first refractive index, the bulk material containing an arrangement of elongate, longitudinal holes that comprise hole material of a third refractive index that is lower than the first refractive index; such that an electromagnetic mode guided in the core ( 20 ) has an evanescent wave that becomes more closely confined to the vicinity of the core ( 20 ) as the wavelength of the electromagnetic mode is increased over a first range of wavelengths.

Photonic bandgap fiber

A photonic bandgap optical fiber and a method of manufacturing said fiber is disclosed. The photonic bandgap fiber comprises a core region surrounded by cladding region. The cladding region includes a background optical material having a first refractive index, and elements of optical material having a second refractive index higher than said first refractive index. The elements are arranges periodically in the background optical material. At the drawing temperature of the fibered, the background optical material has a viscosity lower than the viscosity of the optical material of the elements.

Optical power delivery system

Hollow-core photonic bandgap fibers and methods of manufacturing the same

A hollow-core photonic bandgap fiber has a hollow core 103 and a cladding 105. The cladding surrounds the core at a core boundary 107 and comprises a lattice or network of struts 109,109 and interstitial nodes 111,111 which together define an array of cavities 115. The effective diameter of the core is greater than about 1.05 nΛ, where n is the number of cells removed to form the core along the diagonal and Λ is the average spacing of the cavities or pitch P.

METHOD FOR THE FABRICATION OF OPTICAL WAVEGUIDE DEVICES IN PHOTONIC CRYSTAL FIBERS AND IN WAVEGUIDES WITH HOLLOW STRUCTURES

There is provided a method to fabricate optical taps and waveguide devices in photonic crystal fibers and other fibers with hollow structures. The method involves a preparation step, where the hollow holes inside the fiber are collapsed or partially modified locally; and a waveguide fabrication step, where a femtosecond laser is focused inside the fiber and used to produce optical waveguides that interact in the region that was previously modified in the preparation step.

PHOTONIC CRYSTAL FIBRE

The present invention provides an improved large mode area, single mode or few mode optical fibre that is robust towards loss mechanisms such as bending losses and coupling losses. The optical fiber is aimed for use in transmission of light at at least one optical wavelength, λ. The optical fibre (10) has a longitudinal direction and a cross-section perpendicular thereto. The optical fiber comprises a core region (11) and a micro-structured cladding region. The cladding region surrounds the core region and it comprises micro-structured cladding features (12) that are arranged in a background cladding material (13). A plurality of the micro-structured cladding features has substantially similar size d - typical- ly the cladding features are circular in cross-section and d is equal to the diameter of the cladding features. At least a number of the cladding features are arranged proximal to said core region at a center-to-center cladding feature spacing, h, larger than 3 times λ. The core ...

Method of manufacturing photonic bandgap fibre

All solid photonic bandgap fibre

A method of designing a waveguide

SHUNT FIBER

Shunt fibers having a photonic bandgap cladding region including one or more hollow guiding regions of which one guiding region is configured as the core and one or more other guiding regions are configured as shunts, respectively, provide nearly single mode transmission in the core. The effective mode index of unwanted core modes and modes in one or more shunts are matched closely enough such that higher order modes will selectively couple to the shunt modes by resonant phase matching in the presence of fiber variations. The shunts are designed to have relatively higher losses thereby effectively dissipating power in the higher order modes at a faster rate.

Photonic bandgap fiber

A photonic bandgap fiber includes a first core having a refractive index equal to or smaller than a refractive index of a cladding, a second core that is provided to surround the first core and has a refractive index smaller than the refractive index of the first core, the cladding that surrounds the second core, and a periodic structure portion that is provided in the cladding around the second core, and in which high-refractive index portions having a refractive index larger than the refractive index of the cladding form a periodic structure. The periodic structure is configured such that at least the propagation constant of the fundamental mode at a wavelength to be used is in a photonic bandgap, and the propagation constant of a higher-order mode at the wavelength to be used is outside of the photonic bandgap.

Novel photonic bandgap fibre and use thereof

All solid photonic bandgap fibre

Method of manufacturing a photonic bandgap fibre

The method comprises preparing composite rods 630 having a central region of a first refractive index, and a surrounding region of a second refractive index. There follow steps of: stacking composite rods around a core rod 640; inserting the stacked rods into a jacket tube 645 to form an assembly; and reducing the jacket tube and stacked rods into a fibre (see figure 6c). Embodiments may comprise measuring the refractive index of the composite rods to calculate a ratio of diameters of the central region and surrounding region to determine an amount of the surface of the composite rods to remove, and selectively removing the surface of the composite rods, for example, by etching. Further embodiments may comprise flowing chlorine gas though the assembly to remove impurities or moisture present in the surface of the rod and jacket tube of the assembly.

Optical fibres

OPTICAL FIBER FOR CHEMICAL SENSOR

ALL SOLID PHOTONIC BANDGAP FIBER

All solid photonic bandgap optical fiber comprising a core region and a cladding region is disclosed. The cladding region surrounding the core region includes a background optical material having a first refractive index and elements arranged in a two-dimensional periodic structure. In one embodiment, each of the elements comprises a center part and peripheral part having a higher refractive than the central part. In other embodiments, each element comprises a plurality of rods having a higher refractive index higher than the fist, the rods of each element arranged in a circle or polygon. Light transmission apparatus and methods of using the fiber are also disclosed.

Hollow-core photonic bandgap fibers and methods of manufacturing the same

A hollow-core photonic bandgap fiber has a hollow core 103 and a cladding 105 which surrounds the core at a core boundary 107 and comprises a lattice or network 108 of struts 109, 109 and interstitial nodes 111,111 which together define an array of cavities 115. A ratio of the average cross-sectional area of the nodes at the core boundary to the average cross-sectional area of the nodes within a body of the cladding is from about 0.8 to about 1.2. Another fiber has this ratio from about 1.4 to about 2.0. Another fiber has a ratio of strut thickness at the core boundary to those within the cladding from about 0.4 to 1.0. Another fibre has a ratio of strut thickness to average nodal spacing being less than 0.05. Another fibre has a ratio of strut cross-sectional area to node cross-sectional area of 1 to 30.

Hollow-core photonic bandgap fibers and methods of manufacturing the same

METHOD FOR THE FABRICATION OF OPTICAL WAVEGUIDE DEVICES IN PHOTONIC CRYSTAL FIBERS AND IN WAVEGUIDES WITH HOLLOW STRUCTURES

There is provided a method to fabricate optical taps and waveguide devices in photonic crystal fibers and other fibers with hollow structures. The method is a combination of: a preparation step, where the hollow holes inside the fiber are collapsed or partially modified locally; and a waveguide fabrication step, where a femtosecond laser is focused inside the fiber and used to produce optical waveguides that interact in the region that was previously modified in the initial step. The steps and procedures of this method are provided along with descriptions of the relevant processes involved.

Photonic bandgap fiber and fiber laser device using same

LIGHT SOURCE DEVICE AND PROCESSING METHOD

This light source device has a MOPA configuration, and is equipped with a seed light source, a pulse generator, and interim light amplifier, a final stage light amplifier, optical fiber for delivery, and a light output terminal. The optical fiber for delivery is a PBG fiber having a photonic band gap (PBG) structure in the core periphery area which is positioned around the core. Light having a wavelength within the high loss band of the PBG fiber is input into the PBGF.

Optical fibres

Photonic bandgap fibre

OPTICAL REJECTION PHOTONIC STRUCTURES

An integrated device and related instruments and systems for analyzing samples in parallel are described. The integrated device may include sample wells arranged on a surface of where individual sample wells are configured to receive a sample labeled with at least one fluorescent marker configured to emit emission light in response to excitation light. The integrated device may further include photodetectors positioned in a layer of the integrated device, where one or more photodetectors are positioned to receive a photon of emission light emitted from a sample well. The integrated device further includes one or more photonic structures positioned between the sample wells and the photodetectors, where the one or more photonic structures are configured to attenuate the excitation light relative to the emission light such that a signal generated by the one or more photodetectors indicates detection of photons of emission light.

Hollow photonic crystal fiber the gas absorption cell and manufacturing method thereof

METHOD AND APPARATUS FOR MODELING THE MODAL PROPERTIES OF OPTICAL WAVEGUIDES

PHOTONIC-CRYSTAL FIBRE WITH SPECIFIC MODE CONFINEMENT

A photonic-crystal fibre comprises a core (20) and a cladding (10) with longitudinal holes. The refractive index of the core is lower than that of the cladding bulk material, e.g. by fluorine doping of the core material. The holes are air-filled cavities extending along the longitudinal direction of the fibre. One property of the fibre is that a guided mode having longer wavelength is more confined in the core than a mode with a shorter wavelength. Such a fibre may have a cut-off wavelength λ¿c ? such that the fibre is unable to guide in its core light of wavelengths shorter than λc.

Method and apparatus for modeling the modal properties of optical waveguides

A method and apparatus models one or more electromagnetic field modes of a waveguide. The method includes calculating a first matrix having a plurality of elements and having a first bandwidth using a refractive index profile of the waveguide. The plurality of elements of the first matrix represents an action of Maxwell's equations on a transverse magnetic field within the waveguide. The method further includes rearranging the plurality of elements of the first matrix to form a second matrix having a second bandwidth smaller than the first bandwidth. The method further includes shifting the second matrix and inverting the shifted second matrix to form a third matrix. The method further includes calculating one or more eigenvalues or eigenvectors of the third matrix corresponding to one or more modes of the waveguide.

Vorrichtung und Verfahren zum Transport von gepulster Laserstrahlung mit einer Hohlkernlichtleitfaser

Eine Vorrichtung (11) zum Transport von gepulster Laserstrahlung mit einer Pulsenergie, die bei einer komprimierten Pulsdauer zu hochintensiven Laserpulsen (3C) führt, umfasst eine Pulsdauereinstellvorrichtung (13), eine Hohlkernlichtleitfaser (1) und eine Fasereinkopplungsvorrichtung (17). Die Pulsdauereinstellvorrichtung (13) ist zum Aufnehmen der gepulsten Laserstrahlung und zum Einstellen einer Transportpulsdauer (Δt_t) der Laserstrahlung ausgebildet. Die Hohlkernlichtleitfaser (1) weist einen von Material (4B) umgebenen hohlen Kern (4A) auf, wobei die Hohlkernlichtleitfaser (1) Laserpulse (3B), die an einem ersten Faserende (1A) eingekoppelt werden, im hohlen Kern (4A) zu einem zweiten Faserende (1B) transportiert und dort ausgibt. Ein Betreiben der Hohlkernlichtleitfaser (1) mit am ersten Faserende (1A) vorliegenden Strahlverlaufsparameterwerten (X, α), die in einem Soll-Toleranzbereich (ΔX_S) liegen, ist vorgesehen. Die Fasereinkopplungsvorrichtung (17) ist dazu eingerichtet, die ...

Photonic bandgap optical fibre with higher index elongate cladding features

All solid photonic band gap fibre

A photonic band gap optical fibre has a core region and a cladding region surrounding the core region. The cladding region includes a background optical material and elements e.g. rods arranged in a two-dimensional structure e.g. a circle or polygon. The background optical material has a first refractive index and the elements have a second refractive index higher than the first. The elements may be arranged so that in the normalised modal parameter defined by the formula in claim 1. The fibre is used to suppress stimulated Raman scattering in an optical transmission system.

Photonic bandgap fibre, and use thereof

Optical rejection photonic structures

DISPERSION MANIPULATING FIBRE

Micro-structured optical fibres are improved with respect to increasing the dispersion, both to large negative or large positive values, in a first fibre design in which the fibre has a micro-structured core region being surrounded by a micro-structured cladding region with cladding features being large compared to a predetermined wavelength of light, which can be guided through the fibre. Preferably, the effective index of refraction of the core region, Nco, is larger than the effective index of refraction of the cladding region Ncl, at the predetermined wavelength of light. It is further preferred that the refractive index of one or more of the core features is lower than the refractive index of the core material. Increased dispersion is also obtained by a second optical fibre design in which the fibre has two cladding regions, where the inner cladding region may be micro-structured with inner cladding features and having an effective refractive index that is larger than the effective ...

SYSTEM AND METHOD FOR PRODUCING VORTEX FIBER

The present invention, as disclosed and described herein, in one aspect thereof comprises a preform for making a vortex optical fiber includes a glass cylinder formed substantially of silicone dioxide that defines a core portion along a longitudinal axis of the glass cylinder and a cladding portion surrounding the core portion. The glass cylinder further defines a plurality of holes running parallel to the longitudinal axis from a first end of the glass cylinder to a second end of the glass cylinder. 1. A preform for making a vortex optical fiber , comprising:a glass cylinder formed substantially of silicone dioxide that defines a core portion along a longitudinal axis of the glass cylinder and a cladding portion surrounding the core portion; andwherein the glass cylinder further defines a plurality of holes running parallel to the longitudinal axis from a first end of the glass cylinder to a second end of the glass cylinder.2. The preform of claim 1 , wherein the plurality of holes further includes a first hole along the longitudinal axis of the glass cylinder through the core portion and a plurality of second holes located between the first hole and a circumference of the glass cylinder through the cladding portion.3. The preform of claim 1 , wherein the plurality of holes are drilled in the glass cylinder.4. The preform of claim 1 , wherein the preform defines a refractive index profile that contains a valley along the longitudinal axis of the glass cylinder and a pair of peaks along edges of the core portion within the cladding portion.5. The preform of claim 1 , wherein the vortex optical fiber generated from the preform support propagation of optical signals including orthogonal functions.6. A preform for making a vortex optical fiber claim 1 , comprising:a glass cylinder formed substantially of silicone dioxide that defines a core portion along a longitudinal axis of the glass cylinder and a cladding portion surrounding the core portion;wherein the glass ...

Optical transmission system using a bandgap fibre which suppresses stimulated Raman scattering

An optical transmission system comprising a laser light source arranged to emit light having a frequency l , and transmit the light along a photonic band gap optical fibre having a core guided mode at frequency l and an attenuation band at a frequency of l -13 THz. The optical transmission system suppresses stimulated Raman scattered (SRS) light thereby allowing high optical powers to be transmitted through optical fibre. The photonic bandgap fiber is preferably an all-solid fibre with a solid silia core which provides a band edge between the frequency l and the wavelength of Stokes light.

Novel photonic bandgap fibre and use thereof

An object of the present invention is to provide new designs of microstructured optical fibres that may be fabricated without use of voids, such as fibres being realized using silica and silica doping techniques. The invention relates to a mircrostructured optical fibre that guides light in a core region (52), where the fibre has a cladding region that comprises a background material (51) and a number of cladding features or elements (50) that are elongated in the longitudinal direction of the fibre and have a higher refractive index than the cladding background material. The core region has a lower effective refractive index than the cladding, and the fibre may guide light in the core by photonic bandgap effects. The present invention provides designs of photonic bandgap fibres that may operate without the use of voids in the cladding, thereby simplifiying fabrication of photonic bandgap fibres compared to prior art. The invention further provides photonic bandgap fibers with tuneable ...

Elongate photonic bandgap waveguide with low refractive index core

An elongate waveguide 400 for guiding light comprises a core 410, comprising an elongate region of relatively low refractive index; and a photonic band-gap (PBG) structure 420 that surrounds the core 410. The PBG structure 420 is arranged to provide a photonic band-gap H that can substantially confine light to the core 410. The PBG structure 420 comprises elongate regions of relatively low refractive index interspersed with elongate regions of relatively high refractive index. The band-gap H may reside above the fifth photonic band of the band-gap structure 420 eg. between bands 8 and 9 as shown.

Method of manufacturing photonic bandgap fibre

Hollow-core photonic bandgap fibers

Photonic bandgap fibre

Improvements in and related to photonic-crystal fibres and photonic-crystal fibe devices

Hollow-core photonic bandgap fibers and methods of manufacturing the same

Photonic bandgap fibre

The photonic bandgap fibre comprises a core region surrounded by a cladding region. The cladding region includes a background optical material having a first refractive index, and elements 100 of optical material having a second refractive index higher than said first refractive index. The elements are arranged periodically in the background optical material. At the drawing temperature of the fibre, the background optical material has a viscosity lower than the viscosity of the optical material of the elements. The background optical material may be silica doped with fluorine. The elements of optical material may be made of silica doped with germanium. The fibre is made by stacking together rods with a core of high refractive index in a regular periodic arrangement (see figure 5). At the centre of the arrangement is placed a rod with a core that does not have a high refractive index. The stacked rods are heated to a process temperature and then drawn.

Dispersion manipulating fibre

Micro-structured optical fibres are improved with respect to increasing the dispersion, both to large negative or large positive values, in a first fibre design in which the fibre has a micro-structured core region being surrounded by a micro-structured cladding region with cladding features being large compared to a predetermined wavelength of light, which can be guided through the fibre. Preferably, the effective index of refraction of the core region, Nco, is larger than the effective index of refraction of the cladding region Ncl, at the predetermined wavelength of light. It is is further preferred that the refractive index of one or more of the core features is lower than the refractive index of the core material. Increased dispersion is also obtained by a second optical fibre design in which the fibre has two cladding regions, where the inner cladding region may be micro-structured with inner cladding features and having an effective refrafctive index that is larger than the effective ...

Method and apparatus for modeling the modal properties of optical waveguides

A method and apparatus models one or more electromagnetic field modes of a waveguide. The method includes sampling a two-dimensional cross-section of the waveguide. The method further includes calculating a first matrix having a plurality of elements and having a first bandwidth using the sampled two-dimensional cross-section of the waveguide. The plurality of elements of the first matrix represents an action of Maxwell's equations on a transverse magnetic field within the waveguide. The method further includes rearranging the plurality of elements of the first matrix to form a second matrix having a second bandwidth smaller than the first bandwidth. The method further includes shifting the second matrix and inverting the shifted second matrix to form a third matrix. The method further includes calculating one or more eigenvalues or eigenvectors of the third matrix corresponding to one or more modes of the waveguide.

Photonische Festkörperbandlückenfaser

Photonische optische Bandlückenfaser, die umfasst: einen Kernbereich; und einen Mantelbereich, der den Kernbereich umgibt, wobei der Mantelbereich ein optisches Hintergrundmaterial, das einen ersten Brechungsindex n aufweist, und Elemente umfasst, die in einer zweidimensionalen periodischen Struktur angeordnet sind, bei der jedes der Elemente einen Zentrumsteil und einen Umgebungsteil umfasst, wobei der Umgebungsteil einen größeren Brechungsindex als der Zentrumsteil aufweist; und die Elemente so angeordnet sind, dass die Faser eine Bandlücke in dem normalisierten Modenparameter (β2 – n2k2)Λ2 der Faser aufweist, wobei der untere Bandrand der Lücke über einen Bereich einer normalisierten Frequenz (kΛ) im Wesentlichen konstant ist, wobei β die longitudinale Komponente eines Wellenvektors ist, k die Vakuumwellenzahl ist und Λ die Periode der Elemente in dem Mantelbereich ist.

System and method for producing vortex fiber

A preform for making a vortex optical fiber comprises a glass cylinder formed substantially of silicone dioxide that defines a core portion along a longitudinal axis of the glass cylinder and a cladding portion surrounding the core portion. The glass cylinder further defines a plurality of holes running parallel to the longitudinal axis from a first end of the glass cylinder to a second end of the glass cylinder.

APPARATUSES AND METHODS FOR PERFORMING GAIN GUIDING

A fiber, such as a photonic bandgap fiber, is provided, the fiber including a core and a cladding. The core can extend longitudinally and can have a gain medium configured to provide laser amplification to signal radiation propagating along the core. For example, the gain medium may include a dopant configured to provide laser amplification, when activated by excitation radiation, to signal radiation propagating along said core. The cladding can be radially exterior to the core, and can be configured to resonantly reflect at least some excitation radiation propagating transversely to the core and to generally transmit signal radiation propagating transversely to the core. The core may have an effective core index of refraction that is lower than an effective cladding index of refraction. Associated methods and apparatuses are also provided.

IMPROVED ACTIVE OPTICAL FIBERS WITH WAVELENGTH-SELECTIVE FILTERING MECHANISM, METHOD OF PRODUCTION AND THEIR USE

Active Optical Fibers With Wavelength-Selective Filtering Mechanism, Method of Production and Their Use

The invention relates to optical fibers for use in optical amplification of light, such as in optical fiber amplifiers and lasers and for use in delivery of high power light, in particular to a scheme for reducing amplified spontaneous emission at undesired wavelengths. The invention further relates to articles, methods and use. An object of the invention is achieved by a micro-structured optical fiber, which is adapted to guide light by the photonic bandgap effect and to have one or more pass bands and at least one stop-band over a wavelength range from lambdastop1 to lambdastop2. In an aspect of the invention, the at least one stop-band provides filter functions that suppress nonlinear effects. In another aspect, the core region is actively doped, and the active material has an emission spectrum with a higher value of the emission cross section sigmaE at a wavelength lambdaASE between lambdastop1 and lambdastop2 than outside said wavelength range such that amplified spontaneous emission ...

METHOD OF MANUFACTURING PHOTONIC BANDGAP FIBRE

A method of manufacturing a photonic bandgap fibre comprises preparing composite rods having a central region of a first refractive index, and a surrounding region of a second refractive index. There follow steps of: selectively removing the surface of the composite rods to produce composite rods having a part with a first diameter and a part with a second diameter larger than said first diameter; stacking composite rods around a core rod; inserting the stacked rods into jacket tube to form an assembly; and reducing the jacket tube and stacked rods into fibre. Embodiments may comprise measuring the refractive index of the composite rods to calculate a ratio of diameters of the central region and surrounding region to determine an amount of the surface of the composite rods to remove. Further embodiments may comprise flowing chlorine gas through the assembly to remove impurities or moisture present in the surface of rod and jacket tube of the assembly.

Light source apparatus and processing method

The present invention relates to a light source apparatus. The light source apparatus has an MOPA configuration and comprises a seed light source, a pulse generator, an intermediate optical amplifier, a final stage optical amplifier, a delivery optical fiber, and a light output terminal. The delivery optical fiber is a PBG fiber having a photonic bandgap (PBG) structure in a core-surrounding portion located around the core. Light with a wavelength in a high loss band of the PBG fiber is inputted into the PBG fiber.

METHOD AND APPARATUS FOR MODELING THE MODAL PROPERTIES OF OPTICAL WAVEGUIDES

IMPROVED ACTIVE OPTICAL FIBERS WITH WAVELENGTH-SELECTIVE FILTERING MECHANISM, METHOD OF PRODUCTION AND THEIR USE

The invention relates to optical fibers for use in optical amplification of light, such as in optical fiber amplifiers and lasers and for use in delivery of high power light, in particular to a scheme for reducing amplified spontaneous emission at undesired wavelengths. The invention further relates to articles, methods and use. An object of the invention is achieved by a micro- structured optical fiber, which is adapted to guide light by the photonic bandgap effect and to have one or more pass bands and at least one stop- band over a wavelength range from λstop1 to λstop2- In an aspect of the invention, the at least one stop-band provides filter functions that suppress nonlinear effects. In another aspect, the core region is actively doped, and the active material has an emission spectrum with a higher value of the emission cross section σE at a wavelength λASE between λstop1 and λstop2 than outside said wavelength range such that amplified spontaneous emission and lasing within the wavelength ...

Archimedean-lattice microstructured optical fiber

A microstructured optical fiber exhibiting enhanced circularity of the guided light mode is provided. The microstructured optical fiber includes a light-guiding core and a primary cladding surrounding the core wherein the primary cladding has a plurality of holes arranged in hexagonal unit cells defining an Archimedean-like lattice. Preferably, the core is defined by a break in a center of the Archimedean-like lattice, the break being characterised by an absence of at least one of the unit cells. Also preferably, each of the unit cells has seven holes arranged in a centred hexagon. A method of making the microstructured optical fiber is also provided. The method includes fabricating a fiber preform by stacking a plurality of canes around a rod, each cane having a number of holes arranged in a unit cell defining an Archimedean-like lattice, and drawing said fiber preform into the microstructured optical fiber.

FIBER OPTIC DISTRIBUTED SENSOR APPARATUS

A distributed fiber optic sensor device that employs a photonic band gap fiber as a sensing medium, in which: the photonic band gap fiber, which is the sensing medium, includes: a quartz section; and a plurality of high refractive index portions provided in the quartz section along the longitudinal direction of the fiber, the high refractive index portions being photonic band gaps periodically arranged to form a triangular-lattice pattern; the photonic band gap fiber has a bandwidth in which a wavelength band of a Stokes beam generated due to stimulated Raman scattering is included; and the photonic band gap fiber has a band gap width in which a wavelength band of an anti-Stokes beam generated due to the stimulated Raman scattering and a wavelength band of an optical signal incident into the photonic band gap fiber are included.

Optoelektronisches Bauelement

Es wird ein optoelektronisches Bauelement (10) angegeben. Das Bauelement (10) umfasst eine Primärlichtquelle (1), die dazu eingerichtet ist, im Betrieb des Bauelements eine elektromagnetische Primärstrahlung (P) zu emittieren und einen Lichtleiter (2), der im Strahlengang der elektromagnetischen Primärstrahlung (P) angeordnet ist und einen Kern (2a) aufweist, wobei der Kern (2a) zumindest ein Konvertermaterial umfasst, das dazu eingerichtet ist, die elektromagnetische Primärstrahlung (P) zumindest teilweise in eine elektromagnetische Sekundärstrahlung zu konvertieren.

Multiple core microstructured optical fibers and methods using said fibers

The present invention relates to a microstructured optical fiber including a photonic band gap-guided core; and at least one index-guided core. Another embodiment of the present invention relates to a microstructured optical fiber including a set of main cores; a microstructured region surrounding the set of main cores; and at least alignment core, the alignment cores having substantially different optical propagation properties than the main cores. The present invention also includes methods for coupling, monitoring, and locating discontinuities in the fibers of the present invention.

PHOTONIC BAND GAP FIBER

A photonic bandgap fiber includes a first core having a refractive index equal to or smaller than a refractive index of a cladding, a second core that is provided to surround the first core and has a refractive index smaller than the refractive index of the first core, the cladding that surrounds the second core, and a periodic structure portion that is provided in the cladding around the second core, and in which high-refractive index portions having a refractive index larger than the refractive index of the cladding form a periodic structure. The periodic structure is configured such that at least the propagation constant of the fundamental mode at a wavelength to be used is in a photonic bandgap, and the propagation constant of a higher-order mode at the wavelength to be used is outside of the photonic bandgap.

PHOTONIC BAND GAP FIBER

A photonic band-gap fiber comprises a first core having a refractive index that is not higher than a refractive index of a clad; a second core that is disposed so as to surround the first core and has a refractive index that is lower than the refractive index of the first core; a clad that surrounds the second core; and a periodic structure portion that is disposed in the clad in a vicinity of the second core and is constituted by high-refractive index portions that have a refractive index higher than that of clad and form the periodic structure, and the periodic-structure portion functions as a wave-length filter. By the function of the periodic structure portion as a wave-length filter, it is possible to reduce the propagation loss of the transmission wavelength and increase the propagation loss of the cutoff wavelength.

optical rejection photonic structures

A presente invenção refere-se a um dispositivo integrado e a instrumentos e sistemas relacionados para analisar amostras em paralelo. O dispositivo integrado pode incluir o poço de amostras arranjados em uma superfície de onde os poços de amostras individuais são configurados para receber uma amostra etiquetada com pelo menos um marcador fluorescente configurado para emitir a luz da emissão em resposta à luz da excitação. O dispositivo integrado também pode incluir fotodetectores posicionados em uma camada do dispositivo integrado, onde um ou mais fotodetectores são posicionados para receber um fóton da luz da emissão emitida de um poço de amostra. O dispositivo integrado também inclui uma ou mais estruturas fotônicas posicionadas entre o poço de amostras e os fotodetectores, onde uma ou mais estruturas fotônicas são configuradas para atenuar a luz da excitação em relação à luz da emissão de maneira tal que um sinal gerado por um ou mais fotodetectores indica a detecção de fótons da luz da emissão. The present invention relates to an integrated device and related instruments and systems for analyzing samples in parallel. The integrated device may include the sample well arranged on a surface where the individual sample wells are configured to receive a sample labeled with at least one fluorescent marker configured to emit the emission light in response to the excitation light. The integrated device can also include photodetectors positioned on a layer of the integrated device, where one or more photodetectors are positioned to receive a photon of the emission light emitted from a sample well. The integrated device also includes one or more photonic structures positioned between the sample well and the photodetectors, where one or more photonic structures are configured to attenuate the excitation light in relation to the emission light in such a way that a signal generated by one or more more photodetectors indicates the detection of photons from the emission light. ...

Novel photonic bandgap fibre, and use thereof

An object of the present invention is to provide new designs of microstructured optical fibres that may be fabricated without use of voids, such as fibres being realized using silica and silica doping techniques. The invention relates to a mircrostructured optical fibre that guides light in a core region (52), where the fibre has a cladding region that comprises a background material (51) and a number of cladding features or elements (50) that are elongated in the longitudinal direction of the fibre and have a higher refractive index than the cladding background material. The core region has a lower effective refractive index than the cladding, and the fibre may guide light in the core by photonic bandgap effects. The present invention provides designs of photonic bandgap fibres that may operate without the use of voids in the cladding, thereby simplifiying fabrication of photonic bandgap fibres compared to prior art. The invention further provides photonic bandgap fibers with tuneable ...

METHOD FOR MANUFACTURING PHOTONIC BAND GAP FIBER

A method of manufacturing a photonic bandgap fiber, which includes a core portion and a cladding portion that is formed around the core portion and has holes arranged to form a photonic crystal in which the core portion is a crystal defect, includes forming a preform by inserting, into a jacket tube, hexagonal capillary tubes having tube-holes shapes and outer shapes that are both approximately hexagonal, and drawing the preform. Hereby a photonic bandgap fiber having desired optical characteristics can be manufactured more surely.

MULTIPLE CORE MICROSTRUCTURED OPTICAL FIBERS AND METHODS USING SAID FIBERS

The present invention relates to a microstructured optical fiber (20) including a photonic band gap-guided core (30); and at least one index-guided core (32). Another embodiment of the present invention relates to a microstructured optical fiber including a set of main cores; a microstructured region surrounding the set of main cores; and at least alignment core, the alignment cores having substantially different optical propagation properties than the main cores. The present invention also includes methods for coupling, monitoring, and locating discontinuities in the fibers of the present invention.

Optical fiber with distributed bend compensated filtering

An optical fiber includes a core region having a longitudinal axis. At least a portion of the core region has a substantially helical shape about a helical axis. The longitudinal axis may be substantially tangential to a helical bend in the optical fiber. A cladding region surrounds the core region. The core region and cladding region may be configured to support and guide the propagation of signal light in a fundamental transverse mode in the core region in the direction of the longitudinal axis. The fiber has a bend-induced gradient in its equivalent index of refraction over the portion of the core region. The fiber has a bend-induced equivalent index of refraction. At least a portion of cladding region has a graded refractive index opposite that of the bend-induced gradient. The cladding region may be configured to have a substantially flat equivalent index in response to a helical bend of the optical fiber.

METHOD FOR MANUFACTURING PHOTONIC BAND GAP FIBER

This method is for manufacturing a photonic band gap fiber provided with a core part (11) and a cladding part (12) that is formed on the periphery of the core part (11) and has holes (12a) arranged so as to form a photonic crystal with the core part (11) forming a crystal defect. The method includes a matrix forming step that inserts hexagonally shaped capillary tubes (120), for which the hole shape and outside shape are a substantially hexagonal shape, into a jacket tube (110) and forms a matrix (100), and a drawing step that draws the matrix (100). Thus, a photonic band gap fiber having intended optical characteristics can be manufactured more reliably.

PHOTONIC BANDGAP OPTICAL FIBER

PROBLEM TO BE SOLVED: To provide a method for production of a photonic bandgap optical fiber capable of reducing the loss of the optical fiber and of suppressing the wavelength variation of a bandgap edge. SOLUTION: The method for production of the photonic bandgap optical fiber includes: a step of preparing a plurality of composite rods having a central region of a first refractive index and a surrounding region of a second refractive index; a step S502 of selectively etching each surface of the plurality of composite rods to produce each composite rod having a part with a first diameter and a part with a second diameter larger than the first one; a step S504 of stacking the plurality of etched rods around a core rod to form stacked rods; a step S508 of inserting the stacked rods into a jacket tube to form an assembly; and a step S516 of thinning the jacket tube and the stacked rods into a fiber. COPYRIGHT: (C)2009,JPO&INPIT ...

DISPERSION MANIPULATING FIBRE

Micro-structured optical fibres are improved with respect to increasing the dispersion, both to large negative or large positive values, in a first fibre design in which the fibre has a micro-structured core region being surrounded by a micro-structured cladding region with cladding features being large compared to a predetermined wavelength of light, which can be guided through the fibre. Preferably, the effective index of refraction of the core region, Nco, is larger than the effective index of refraction of the cladding region Ncl, at the predetermined wavelength of light.It is further preferred that the refractive index of one or more of the core features is lower than the refractive index of the core material. Increased dispersion is also obtained by a second optical fibre design in which the fibre has two cladding regions, where the inner cladding region may be micro-structured with inner cladding features and having an effective refrafctive index that is larger than the effective ...

Graded index fiber array and method of manufacture

A graded index fiber formed of a plurality of fused graded index fibers is provided. Each fiber is formed from a preform comprising a plurality of fused low index rods with at least one high index rod arranged in a pre-determined pattern which have been drawn and fused. An array may be made utilizing such fibers, with each fiber having a center located at a specified position. A method of forming the GRIN fibers and the GRIN fiber array is also provided.

PHOTONIC CRYSTAL FIBER AND HIGH-POWER LIGHT TRANSMISSION SYSTEM

A photonic crystal fiber according to the present invention has a plurality of holes arranged in the optical fiber along a longitudinal direction, in which the holes are arranged such that, in a cross section, a hole ratio which is an area of the holes per unit area is larger in a central side than in an outer side in a portion corresponding to a cladding and that a wide core area can be obtained while the number of modes that can be propagated is limited to several. Moreover, in a high-power optical transmission system according to the present invention, the amount of axis misalignment between the central axis of a laser oscillator and the central axis of the photonic crystal fiber is less than or equal to a certain amount.

DIFFRACTION-FREE OPTICAL WAVEGUIDE

The present invention provides a method of designing a waveguide having a refractive index profile associated with substantially diffraction-free propagation of light. The method includes the steps of creating a mathematical model describing an optical field associated with the diffraction-free propagation and deriving parameters for the design of the waveguide from the mode. The invention also provides a waveguide (20) that has a central region (12) of lower refractive index surrounded by a region of higher refractive index, the waveguide being arranged such that, in use, the intensity distribution of guided light has a maximum in the central low-index region (12). The waveguide may include a plurality of light confining elements (16) {for example, air channels} arranged such as to create a profile of effective refractive index similar to that of a Fresnel lens.

PHOTONIC BANDGAP FIBER

A photonic bandgap fiber includes a first core having a refractive index equal to or smaller than a refractive index of a cladding, a second core that is provided to surround the first core and has a refractive index smaller than the refractive index of the first core, the cladding that surrounds the second core, and a periodic structure portion that is provided in the cladding around the second core, and in which high-refractive index portions having a refractive index larger than the refractive index of the cladding form a periodic structure. The periodic structure is configured such that at least the propagation constant of the fundamental mode at a wavelength to be used is in a photonic bandgap, and the propagation constant of a higher-order mode at the wavelength to be used is outside of the photonic bandgap.

Optical power delivery system

An optical transmission system comprising a laser light source arranged to emit light having a frequency omega; and an optical transmission line adapted to guide the light, wherein said optical transmission line includes a photonic bandgap optical fibre having a core guided mode at frequency omega and an attenuation band at a frequency of omega-13 THz. The optical transmission system suppresses Raman scattered light thereby allowing high optical powers to be transmitted through optical fibre.

Photonic crystal fiber and high-power light transmission system

A photonic crystal fiber according to the present invention has a plurality of holes arranged in the optical fiber along a longitudinal direction, in which the holes are arranged such that, in a cross section, a hole ratio which is an area of the holes per unit area is larger in a central side than in an outer side in a portion corresponding to a cladding and that a wide core area can be obtained while the number of modes that can be propagated is limited to several. Moreover, in a high-power optical transmission system according to the present invention, the amount of axis misalignment between the central axis of a laser oscillator and the central axis of the photonic crystal fiber is less than or equal to a certain amount.

Optical denial photonic structures

Dispersion manipulating fibre

Micro-structured optical fibers are improved with respect to increasing the dispersion, both to large negative or large positive values, in a first fiber design in which the fiber has a micro-structured core region being surrounded by a micro-structured cladding region with cladding features being large compared to a predetermined wavelength of light, which can be guided through the fiber. Preferably, the effective index of refraction of the core region, Nco, is larger than the effective index of refraction of the cladding region, Ncl, at the predetermined wavelength of light. It is further preferred that the refractive index of one or more of the core features is lower than the refractive index of the core material. Increased dispersion is also obtained by a second optical fiber design in which the fiber has two cladding regions, where the inner cladding region may be micro-structured with inner cladding features and having an effective refractive index that is larger than the effective ...

IMPROVED ACTIVE OPTICAL FIBERS WITH WAVELENGTH-SELECTIVE FILTERING MECHANISM, METHOD OF PRODUCTION AND THEIR USE

The invention relates to optical fibers for use in optical amplification of light, such as in optical fiber amplifiers and lasers and for use in delivery of high power light, in particular to a scheme for reducing amplified spontaneous emission at undesired wavelengths. The invention further relates to articles, methods and use. An object of the invention is achieved by a micro- structured optical fiber, which is adapted to guide light by the photonic bandgap effect and to have one or more pass bands and at least one stop- band over a wavelength range from λstop1 to λstop2- In an aspect of the invention, the at least one stop-band provides filter functions that suppress nonlinear effects. In another aspect, the core region is actively doped, and the active material has an emission spectrum with a higher value of the emission cross section σE at a wavelength λASE between λstop1 and λstop2 than outside said wavelength range such that amplified spontaneous emission and lasing within the wavelength range from λstop1 to λstop2 is reduced. In still another aspect, the optical fiber exhibits photonic bandgaps at different wavelength ranges in different radial directions of a cross section of the optical fiber.

フォトニックバンドギャップファイバの製造方法

SHUNT FIBER

Shunt fibers having a photonic bandgap cladding region including one or more hollow guiding regions of which one guiding region is configured as the core and one or more other guiding regions are configured as shunts, respectively, provide nearly single mode transmission in the core. The effective mode index of unwanted core modes and modes in one or more shunts are matched closely enough such that higher order modes will selectively couple to the shunt modes by resonant phase matching in the presence of fiber variations. The shunts are designed to have relatively higher losses thereby effectively dissipating power in the higher order modes at a faster rate.

PHOTONIC BANDGAP FIBRE, AND USE THEREOF

An object of the present invention is to provide new designs of microstructured optical fibres that may be fabricated without use of voids, such as fibres being realized using silica and silica doping techniques. The invention relates to a microstructured optical fibre that guides light in a core region (52), where the fibre has a cladding region that comprises a background material (51) and a number of cladding features or elements (50) that are elongated in the longitudinal direction of the fibre and have a higher refractive index than the cladding background material. The core region has a lower effective refractive index than the cladding, and the fibre may guide light in the core by photonic bandgap effects. The present invention provides designs of photonic bandgap fibres that may operate without the use of voids in the cladding, thereby simplifying fabrication of photonic bandgap fibres compared to prior art. The invention further provides photonic bandgap fibers with tuneable waveguiding properties, such as tuneable polarization. The invention further relates to a number of specific fibre designs that provide improvements with respect to dispersion characteristics, mode field diameters, propagation losses, polarization mode dispersion and other issues of relevance to optical communication systems.

Light source apparatus and processing method

The present invention relates to a light source apparatus. The light source apparatus has an MOPA configuration and comprises a seed light source, a pulse generator, an intermediate optical amplifier, a final stage optical amplifier, a delivery optical fiber, and a light output terminal. The delivery optical fiber is a PBG fiber having a photonic bandgap (PBG) structure in a core-surrounding portion located around the core. Light with a wavelength in a high loss band of the PBG fiber is inputted into the PBG fiber.

OPTICAL REJECTION PHOTONIC STRUCTURES

An integrated device and related instruments and systems for analyzing samples in parallel are described. The integrated device may include sample wells arranged on a surface of where individual sample wells are configured to receive a sample labeled with at least one fluorescent marker configured to emit emission light in response to excitation light. The integrated device may further include photodetectors positioned in a layer of the integrated device, where one or more photodetectors are positioned to receive a photon of emission light emitted from a sample well. The integrated device further includes one or more photonic structures positioned between the sample wells and the photodetectors, where the one or more photonic structures are configured to attenuate the excitation light relative to the emission light such that a signal generated by the one or more photodetectors indicates detection of photons of emission light. 1. An integrated device comprising:a plurality of sample wells arranged on a first layer of the integrated device, wherein individual sample wells of the plurality of sample wells are configured to receive a sample labeled with at least one fluorescent marker configured to emit emission light in response to excitation light;a plurality of photodetectors arranged on a second layer of the integrated device and positioned to receive photons of emission light emitted from the plurality of sample wells, wherein individual sample wells of the plurality of sample wells align with at least one photodetector of the plurality of photodetectors; andat least one photonic structure positioned between an individual sample well and its respective at least one photodetector, the at least one photonic structure configured to attenuate the excitation light relative to the emission light, wherein a signal generated by the at least one photodetector indicates detection of photons of emission light.2. The integrated device of claim 1 , wherein the at least one ...

ANTI-TORSION SOLID-CORE POLARIZATION-MAINTAINING PHOTONIC CRYSTAL FIBER BASED ON ANISOTROPY OF STRESS DISTRIBUTION

An anti-torsion solid-core polarization-maintaining photonic crystal fiber includes a cladding having an inner layer arranged around the core and an outer layer between the inner layer and the outer wall of the cladding. The inner layer has multi-layer air holes used to construct optical properties and two micron-size air holes arranged along the x-axis extending in the center producing form birefringence. The outer layer includes multi-layer air holes arranged radially along the y-axis. The size and arrangement of the multi-layer air holes in the outer layer cause the bending stiffness of the photonic crystal fiber along the x-axis to be different from that along the y-axis. While meeting the requirements of the optical properties of the fiber, the photonic crystal fiber possesses an anti-torsion ability due to the anisotropy of stress distribution in the radial direction, thereby reducing the non-reciprocal phase difference generated by the magneto-optic Faraday Effect. 1. An anti-torsion solid-core polarization-maintaining photonic crystal fiber based on anisotropy of stress distribution , the photonic crystal fiber comprising a core and a cladding that includes an inner layer arranged around the core and an outer layer between the inner layer and an outer wall of the cladding , whereinthe inner layer has multiple layers of first air holes arranged for constructing optical properties and two micron-size air holes arranged along an x-axis extending through a center of the inner layer for guaranteeing birefringence in the fiber, wherein the micron-size air holes are each larger than each of the first air holes;the outer layer has multiple layers of second air holes arranged around a y-axis, wherein the y-axis is perpendicular to the x-axis;the inner layer and the outer layer as a whole are symmetric with respect to the x-axis and the y-axis as a whole; andis the multiple layers of second air holes are configured in a way as to cause the bending stiffness of the ...

HOLLOW-CORE PHOTONIC CRYSTAL FIBER GAS CELL AND METHOD FOR PREPARING THE SAME

A hollow-core photonic crystal fiber gas cell and method for preparing the same. The hollow-core photonic crystal fiber gas cell comprises a single-mode fiber, a fiber splicing protection sleeve, a hollow-core photonic crystal fiber, and a photoelectric detector. One end of the single-mode fiber is fusion spliced with one end of the hollow-core photonic crystal fiber to form a fusion splice and seal one end of the hollow-core photonic crystal fiber gas cell. The fiber splicing protection sleeve covers and protects the fusion splice. The other end of the hollow-core photonic crystal fiber is processed into an output end by fusion sealing, and the surface of the output end faces, but is not parallel to, a detection surface of the photoelectric detector. 1. A hollow-core photonic crystal fiber gas cell , comprisinga single-mode fiber having two ends,a fiber splicing protection sleeve,a hollow-core photonic crystal fiber having two ends, anda photoelectric detector having a detection surface,wherein one end of the single-mode fiber is fused with one end of the hollow-core photonic crystal fiber to form a fusion splice and the end of a sealed hollow-core photonic crystal fiber gas cell;the fiber splicing protection sleeve covers and protects the fusion splice;the other end of the hollow-core photonic crystal fiber gas cell is processed into an output end in by fusion sealing, and an end surface of the output end faces, but is not parallel to, the detection surface of the photoelectric detector.2. A method for preparing the hollow-core photonic crystal fiber gas cell as described in claim 1 , comprisingprocessing one end of the single-mode fiber by fusion splicing to form a fusion splice and sealing the end of the hollow-core photonic crystal fiber gas cell air-tight,covering and protecting the fusion splice with the fiber splicing protection sleeve,placing the hollow-core photonic crystal fiber and the single-mode fiber spliced thereto in a vacuum chamberfilling the ...

Method of Manufacturing an Active Optical Fibre and the Active Optical Fibre

The invention relates to a method of manufacturing an active optical fibre having a cladding and a doped core, as well as the active optical fibre equipped with the cladding and the doped core. The active optical fibre according to the invention is adapted to conduct and generate radiation having a wavelength λ and is provided with a cladding and a core containing at least one active dopant, characterised in that the core comprises elongate elements made of a first type of glass having a first refractive index n 1 and elongate elements of a second type of glass having a second refractive index n 2 , oriented along the optical fibre and forming a compact bundle, wherein transverse dimensions of the elongate core elements are smaller than ⅕ of the wavelength λ. Such optical fibres are used in laser generation and in amplification techniques.

System and method for producing vortex fiber

A preform for making a vortex optical fiber comprises a glass cylinder formed substantially of silicone dioxide that defines a core portion along a longitudinal axis of the glass cylinder and a cladding portion surrounding the core portion. The glass cylinder further defines a plurality of holes running parallel to the longitudinal axis from a first end of the glass cylinder to a second end of the glass cylinder.

Multicore fiber

A multicore fiber includes: a first core configured to propagate an LP 01 mode, an LP 11 mode, and an LP 21 mode light beam; and a second core configured to propagate an LP 01 mode light beam, wherein a different mode interaction section is provided in which a propagation constant of the LP 21 mode light beam propagated through the first core is matched with a propagation constant of the LP 01 mode light beam propagated through the second core, a different mode non-interaction section is provided in which propagation constants of the LP mode light beams propagated through the first core are not matched with propagation constants of the LP mode light beams propagated through the second core, and the first core includes an inner core and an outer core surrounding the inner core with no gap and having a refractive index higher than a refractive index of the inner core.

OPTICAL FIBER AND OPTICAL TRANSMISSION SYSTEM

The optical fiber of the present invention includes a core, and a cladding that is provided on an outer periphery of the core and has a refractive index lower than a refractive index of the core region. In the optical fiber of the present invention, a V value representing a normalized frequency of an LPmode is greater than or equal to 4.8 and less than or equal to 6.4. 1. An optical fiber comprising:a core; anda cladding that is provided on an outer periphery of the core and has a refractive index lower than a refractive index of the core,{'sub': '02', 'wherein a V value representing a normalized frequency of an LPmode is greater than or equal to 4.8 and less than or equal to 6.4.'}2. The optical fiber according to claim 1 , wherein{'sub': '02', 'the V value representing the normalized frequency of the LPmode is greater than or equal to 5.3 and less than or equal to 6.4,'}{'sup': '2', 'an effective area is greater than or equal to 150 μm,'}a radius of the core is greater than or equal to 8.0 μm and less than or equal to 13.4 μm, anda relative refractive index difference is greater than or equal to 0.33% and less than or equal to 0.55%.3. An optical transmission system comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a transmission line including the optical fiber according to ;'}a transmitter that is configured to output signal light;{'sub': '02', 'a mode exciter that is configured to excite a linearly polarized mode of the signal light output from the transmitter to an LPmode and input the excited signal light to the transmission line;'}{'sub': '02', 'a mode converter that is configured to convert the linearly polarized mode of the signal light, which is excited to the LPmode and output from the transmission line, into a fundamental mode; and'}a receiver that is configured to receive the signal light converted into the fundamental mode,{'sub': '02', 'wherein the optical fiber is configured to propagate the signal light excited to the LPmode.'}4. The ...

Optical fiber with a low-index core and a core grating

An optical fiber with a low-index core and a core grating has a solid and generally cylindrical annular cladding having a refractive index n cl , a central axis, an inner surface with a radius r wherein r≧2 μm, an outer surface with a radius R, and an annular thickness ΔR≧10 μm. The fiber core has the radius r and a refractive index n c , wherein n cl >n c . The grating is defined by grating elements that extend from the cladding inner surface into the core and that run generally parallel to the central axis. The grating elements define a period , a width t, a spacing a and a height h, wherein 0.5<

PHOTONIC CRYSTAL FIBER AND HIGH-POWER LIGHT TRANSMISSION SYSTEM

A photonic crystal fiber according to the present invention has a plurality of holes arranged in the optical fiber along a longitudinal direction, in which the holes are arranged such that, in a cross section, a hole ratio which is an area of the holes per unit area is larger in a central side than in an outer side in a portion corresponding to a cladding and that a wide core area can be obtained while the number of modes that can be propagated is limited to several. Moreover, in a high-power optical transmission system according to the present invention, the amount of axis misalignment between the central axis of a laser oscillator and the central axis of the photonic crystal fiber is less than or equal to a certain amount. 1. A photonic crystal fiber having a plurality of holes arranged in the optical fiber along a longitudinal direction ,wherein, in a cross section, a hole ratio which is an area of the holes per unit area is larger in a central side than in an outer side in a portion corresponding to a cladding,an interval among all of the holes is Λ, and a diameter d1 of the holes in the central side is larger than a diameter d of the holes in the outer side, and, when Λ is represented in a horizontal axis and d1/d is represented in a vertical axis, Λ, d1, and d are in a region where respective regions represented by mathematical formulas C1 overlap, and [{'br': None, 'i': 'C', '[Mathematical Formulas 1]'}, {'br': None, 'i': d', 'd≤, '1/0.633Λ−5.467(Λ≤11.8 μm)'}, {'br': None, 'i': d', 'd≤−, '1/0.0429Λ+2.486(11.8 μm≤Λ≤15.4 μm)'}, {'br': None, 'i': d', 'd≥, '1/0.0454Λ1.13(Λ≥15.4 μm)'}, {'br': None, 'i': d', 'd≥, '1/1(Λ≤16.8 μm)'}, {'br': None, 'i': d', 'd≥, '1/0.117Λ−0.96(Λ≥16.8 μm)\u2003\u2003(C1)'}], 'a bending loss of a basic mode is 1 dB/km with a bending radius of 500 mm or less.'}2. The photonic crystal optical fiber according to claim 1 , wherein the number of propagation modes is three or less.3. The photonic crystal optical fiber according to claim 2 , ...

Stable, High Efficiency, Wavelength Tunable Fiber Optic Parametric Oscillator

An optical apparatus comprising: a source and a loop. The source generates a pump. The resonating cavity of the source includes: a gain medium; and a tunable filter for selecting a wavelength. The loop comprises: an input coupler; a waveguide; and an output coupler. The input coupler receives the pump and a signal and outputs the pump and the signal into the waveguide In the waveguide, energy in the pump is transferred into energy in the signal while a relative center position of the signal is crossing a center position of the pump in a first direction while both are passing through the waveguide and into the output coupler. The output coupler r outputs a first portion of the signal and a second portion of the signal is fed into the input coupler as the signal, completing the loop.

Wide-range multiband thermo-optic switch and manufacturing method thereof

本发明公开了一种宽范围多波段热光开关及其制作方法，该方法利用大气压压力及毛细作用将液晶全填充到光子晶体光纤中，然后用光纤切割刀把全填充的光子晶体光纤和单模光纤端面切割平整放在光纤熔接机上，将单模光纤与液晶全填充的光子晶体光纤熔接在一起。然后将液晶填充光子晶体光纤放在高精度数显恒温加热台上，将其两端的单模光纤分别接在宽带光源和光谱仪上。在液晶清亮温度附近，液晶折射率会发生剧烈变化，进而引起光子带隙移动。在光子带隙和干涉共同作用下，透射光谱会发生剧烈移动，进而形成热光开关S1,S2,S3和S4四个主要热光开关。热光开关不仅具有高的消光比，宽的控制范围，还能同时控制两个通信窗口波段。

Apparatus and method for transmitting pulsed laser radiation with hollow core optical fiber

一种用于传输具有在压缩的脉冲持续时间的情况下导致高强度激光脉冲(3C)的脉冲能量的脉冲激光辐射的设备(11)包括：脉冲持续时间设定设备(13)、空芯光纤(1)和光纤耦合输入设备(17)。所述脉冲持续时间设定设备构造用于接收所述脉冲激光辐射并且用于设定所述激光辐射的传输脉冲持续时间(Δt_t)。所述空芯光纤具有由材料(4B)包围的中空芯部(4A)的，其中，所述空芯光纤(1)将在第一光纤端(1A)处耦合输入的激光脉冲(3B)在所述中空芯部(4A)中传输到第二光纤端(1B)并且在所述第二光纤端将所述激光脉冲输出。设置，以存在于所述第一光纤端(1A)处的射束走向参数值(X，α)运行所述空芯光纤(1)，所述射束走向参数值位于目标容差范围(ΔX_S)内。所述光纤耦合输入设备设置用于，接收设定为所述传输脉冲持续时间(Δt_t)的激光辐射并且以射束走向参数值(X，α)将所述激光辐射耦合输入到所述空芯光纤(1)中，所述射束走向参数值位于所述目标容差范围(ΔX_S)内。以这样的方式设定所述传输脉冲持续时间(Δt_t)，使得针对在所述目标容差范围(ΔX_S)内的所有射束走向参数值(X，α)给出所述激光辐射到所述中空芯部(4A)中的如下耦合输入：在所述耦合输入的情况下，保留所述空芯光纤(1)的材料和/或结构(37)。

The novel big covering sensor fibre of one kind and its Fibre Optical Sensor ring

本发明涉及一种新型大包层传感光纤及其光纤传感环。光纤由长拍长保偏光子晶体光纤从头到尾经扭转处理形成，扭转以后光纤的最小螺距介于0.2～2mm之间。光纤的包层介于300～800μm之间。传感环包括石英基底层、传感光纤、石英上包层、外部保护骨架等。采用超快激光加工技术，对一体化传感光纤进行整体定型。退火释放应力之后，磨平粗糙部分；钻出中心通孔，放入外部保护骨架内固定封装即可。石英基底层的膨胀系数和光纤接近，封装成传感环后，既减少了外部温度和振动对一体化光纤偏振态的影响，又有效地固定和保护了一体化光纤。本发明制作精度高，使用方便。

A kind of new big covering sensor fibre and its Fibre Optical Sensor ring

本发明涉及一种新型大包层传感光纤及其光纤传感环。光纤由长拍长保偏光子晶体光纤从头到尾经扭转处理形成，扭转以后光纤的最小螺距介于0.2～2mm之间。光纤的包层介于300～800μm之间。传感环包括石英基底层、传感光纤、石英上包层、外部保护骨架等。采用超快激光加工技术，对一体化传感光纤进行整体定型。退火释放应力之后，磨平粗糙部分；钻出中心通孔，放入外部保护骨架内固定封装即可。石英基底层的膨胀系数和光纤接近，封装成传感环后，既减少了外部温度和振动对一体化光纤偏振态的影响，又有效地固定和保护了一体化光纤。本发明制作精度高，使用方便。

Photonic crystal fiber and high power optical transmission system

本発明に係るフォトニック結晶ファイバは、光ファイバ中に長手方向に沿って配置される複数の空孔を有するフォトニック結晶ファイバであって、前記空孔を、断面において、単位面積当たりの前記空孔の面積である空孔比率はクラッドに相当する部分で外側より中心側が大きくなるように、且つ伝搬可能なモード数を数個程度に制限しつつ広いコア面積が得られる配置とした。また、本発明に係るハイパワー光伝送システムは、レーザ発振部の中心軸とフォトニック結晶ファイバの中心軸との軸ずれ量を一定量以下とした。   The photonic crystal fiber according to the present invention is a photonic crystal fiber having a plurality of holes arranged along the longitudinal direction in an optical fiber, and the holes per unit area in the cross section. The hole ratio, which is the area of the hole, is arranged so that the center side is larger than the outside in the portion corresponding to the clad, and a wide core area is obtained while limiting the number of modes that can be propagated to about several. In the high power optical transmission system according to the present invention, the amount of axial deviation between the central axis of the laser oscillation unit and the central axis of the photonic crystal fiber is set to a certain amount or less.

Photonic crystal fiber and high-power light transmission system

light-rejecting photonic structures

Photonic crystal fiber and high-power light transmission system

Hollow-core photonic crystal fiber gas cell and manufacturing method therefor

Polarization-maintaining fiber with asymmetric stresses applying portion

实施例涉及一种光缆组件。所述光缆组件是偏振保持光纤组件。该组件包括定位在包覆层内的光芯。包覆层内还设有应力棒。应力棒能够在包覆层内居中，并且光纤偏心地定位在包覆层内。还可以设有偏心地定位在包覆层内的第二光纤。光纤能够在包覆层内居中，并且应力棒偏心地定位在包覆层内。

Hollow-core photonic bandgap fiber polarizer

A hollow-core photonic bandgap fiber polarizer may include a core, an inner cladding surrounding the core, the inner cladding including a plurality of capillaries, and an outer cladding at least partially surrounding the inner cladding. A section of the capillaries distal to the core is asymmetric relative to a section of the capillaries proximal to the core.

Circular photonic crystal fibers

Certain exemplary embodiments can provide a system, machine, device, and/or manufacture adapted for and/or resulting from, and/or a method for, activities that can include and/or relate to, providing a photonic crystal fiber that includes an elongated solid core that extends a length of the photonic crystal fiber and defines a fiber longitudinal axis and an elongated annular cladding extending the length of the photonic crystal fiber and is co-axial with the core.

Rhombic double-core photonic crystal fiber polarization beam splitter with liquid crystal filled in air holes

本发明公开了一种空气孔填充液晶的菱形双芯光子晶体光纤偏振分束器，包括纤芯区域和包层区域；其中，包层区域位于纤芯区域的外侧；纤芯区域包括第一圆孔气孔、第一纤芯和第二纤芯，第一圆空气孔位于纤芯区域的正中心，其内部完全填充向列项液晶材料；第一纤芯和第二纤芯位于第一圆空气孔两侧；包层区域包括多个第二圆空气孔、多个第三圆空气孔以及多个第四圆空气孔；第一纤芯、第二纤芯、多个第二圆空气孔、多个第三圆空气孔以及多个第四圆空气孔环绕第一圆孔气孔呈多层排布结构，且多层排布结构的每一层均为菱形结构。本发明结构简单，长度较短，能够在全光通信系统等方面发挥重要作用。

Light source device and processing method

该光源装置具有MOPA构造且设有种子光源、脉冲发生器、中间光学放大器、末级光学放大器、输送光纤和光输出端。所述输送光纤为在位于芯部周围的芯部围绕部分中具有光子带隙（PBG）结构的PBG光纤。具有在PBG光纤的高损耗带中的波长的光被输入到PGBF中。

Hollow-core photonic crystal fiber gas cell and manufacturing method therefor

A hollow-core photonic crystal fiber gas cell and a manufacturing method therefor. The hollow-core photonic crystal fiber gas cell comprises a single-mode fiber (103), a fiber splicing protection sleeve (105), a hollow-core photonic crystal fiber (111) and a photoelectric detector (121). One end of the single-mode fiber (103) is fused with one end of the hollow-core photonic crystal fiber (111) so that a fusion splice (107) is formed and one end of a sealed hollow-core photonic crystal fiber gas cell is formed. The fiber splicing protection sleeve (105) protects the fusion splice (107) in a covering manner. The hollow-core photonic crystal fiber gas cell is characterized in that the other end of the hollow-core photonic crystal fiber (111) is processed into an output end (115) in a fusion sealing manner. An output end surface faces, but is not parallel to, a detection surface of the photoelectric detector (121). The hollow-core photonic crystal fiber gas cell effectively alleviates the background noise problem of transmitted light of existing hollow-core photonic crystal fiber gas cells and has the characteristics of being small in size, light in weight and high in stability.

Optical fiber design method

本发明涉及的光纤设计方法是在光纤中具有沿长边方向配置的多个空孔的光子晶体光纤的设计方法，所述空孔使在剖面中每单位面积的所述空孔的面积即空孔比率在相当于包层的部分使中心侧比外侧更大，由光波长、传送距离、及输出功率计算出必要的有效剖面积，并计算出与有效剖面积对应的光纤构造(空孔直径和空孔间隔)。

Optical waveguide

본 발명은 광도파로에 관한 것으로, 특히 광도파로의 임의의 위치로부터 광을 취출할 수 있는 광도파로에 관한 것이다. 본 발명의 목적은 광도파로의 임의의 위치로부터 효율적으로 광을 취출할 수 있는 광도파로를 제공하는 것이다. 상기 목적을 달성하기 위해 본 발명의 일 태양에 따르면, 광도파로가 광을 도파하기 위한 코어와, 클래드와, 코어가 클래드와 접촉하도록 하기 위한 변위 구조체를 구비한다. 코어는 제1 굴절률을 갖는다. 클래드는 제1 굴절률보다 높은 제2 굴절률을 갖는다. The present invention relates to an optical waveguide, and more particularly, to an optical waveguide capable of extracting light from an arbitrary position of the optical waveguide. It is an object of the present invention to provide an optical waveguide capable of efficiently extracting light from any position in the optical waveguide. According to one aspect of the present invention for achieving the above object, an optical waveguide includes a core for guiding light, a clad, and a displacement structure for bringing the core into contact with the clad. The core has a first refractive index. The clad has a second refractive index that is higher than the first refractive index. 광도파로, 코어, 클래드, 변위 구조체, 굴절률 Optical waveguide, core, clad, displacement structure, refractive index

Photonic bandgap fiber

本発明は、クラッドの屈折率以下の屈折率を持つ第１コアと、該第１コアを囲んで設けられ第１コアの屈折率未満の屈折率を持つ第２コアと、該第２コアを囲むクラッドと、該クラッドの第２コア近傍に設けられ、クラッドの屈折率よりも屈折率が高屈折率部が周期構造をなして構成された周期構造部と、を備え、前記周期構造は、少なくとも使用波長の基本モードの伝搬定数がフォトニックバンドギャップ中にあり、前記使用波長の高次モードの伝搬定数が前記フォトニックバンドギャップの外にあるフォトニックバンドギャップファイバに関する。 The present invention includes a first core having a refractive index equal to or lower than a refractive index of a clad, a second core provided around the first core and having a refractive index lower than that of the first core, and the second core. An enclosing clad, and a periodic structure portion provided in the vicinity of the second core of the clad and having a refractive index part having a refractive index higher than the refractive index of the clad to form a periodic structure, the periodic structure comprising: The present invention relates to a photonic band gap fiber in which a propagation constant of at least a fundamental mode of a used wavelength is in a photonic band gap, and a propagation constant of a higher order mode of the used wavelength is outside the photonic band gap.

Multiple core microstructured optical fibers and methods using said fibers

The present invention relates to a microstructured optical fiber including a photonic band gap-guided core; and at least one index-guided core. Another embodiment of the present invention relates to a microstructured optical fiber including a set of main cores; a microstructured region surrounding the set of main cores; and at least alignment core, the alignment cores having substantially different optical propagation properties than the main cores. The present invention also includes methods for coupling, monitoring, and locating discontinuities in the fibers of the present invention.

Preform for producing vortex fiber

The present invention, as disclosed and described herein, in one aspect thereof comprises a preform for making a vortex optical fiber includes a glass cylinder formed substantially of silicone dioxide that defines a core portion along a longitudinal axis of the glass cylinder and a cladding portion surrounding the core portion. The glass cylinder further defines a plurality of holes running parallel to the longitudinal axis from a first end of the glass cylinder to a second end of the glass cylinder.

Fiber optic distributed sensor apparatus

A distributed fiber optic sensor device that employs a photonic band gap fiber as a sensing medium, in which: the photonic band gap fiber, which is the sensing medium, includes: a quartz section; and a plurality of high refractive index portions provided in the quartz section along the longitudinal direction of the fiber, the high refractive index portions being photonic band gaps periodically arranged to form a triangular-lattice pattern; the photonic band gap fiber has a bandwidth in which a wavelength band of a Stokes beam generated due to stimulated Raman scattering is included; and the photonic band gap fiber has a band gap width in which a wavelength band of an anti-Stokes beam generated due to the stimulated Raman scattering and a wavelength band of an optical signal incident into the photonic band gap fiber are included.

Optical fiber, and method of manufacturing and of operating

The invention concerns an optical fiber (1) for radiation generation, concentration and transfer. The optical fiber comprises at least one luminescence generating zone of a first material comprising a luminescence generating material for providing an emitting radiation predominantly at a visible and/or near-infrared wavelength. The optical fiber further comprises at least one wave guiding zone. The at least one wave guiding zone is configured to concentrate the emitted radiation predominantly within the wave guiding zone. This provides distinct locations with different functionality, one location for generating the emitted radiation and the further location for guiding and concentrating of the emitted radiation. Thus, both zones can be specifically designed to provide optimized performance and efficiency.

Światłowodowe źródło światła ze wzmocnioną emisją spontaniczną

Przedmiotem zgłoszenia jest optofluidyczne, światłowodowe źródło światła ze wzmocnioną emisją spontaniczną, przeznaczone do stosowania w systemach energii odnawialnej a także w innych urządzeniach czy przyrządach takich jak czujniki biochemiczne, gdzie jako ośrodek czynny wykorzystywane są komórki i materiały pochodzenia biologicznego. Źródło światłowodowe ma moduł laserowy (1) emitujący wiązkę o długości fali dłuższej niż 300 nm, połączony ze światłowodem antyrezonansowym (ARF) (3) poprzez dwukanałowy rezerwuar (2). Kanał (5) rezerwuaru (2) połączony jest optycznie ze światłowodem, natomiast kanał (4) rezerwuaru, połączony jest z zewnętrzną pompą mikrofluidyczną (6) podającą w sposób ciągły pod ciśnieniem od kilku do 1000 mBar roztwór związku fluorescencyjnego do rdzenia światłowodu (3).

具有硅化物涂层分段的布拉格光栅

本申请涉及具有硅化物涂层分段的布拉格光栅，揭示了包括布拉格光栅的结构和制造包括布拉格光栅的结构的方法。所述结构包括波导芯和布拉格光栅，所述布拉格光栅具有以与所述波导芯相邻的间隔排列定位的多个分段。每个分段包括一个或多个外表面。所述结构还包括位于各分段的所述一个或多个外表面上的硅化物层。

具有硅化物涂层分段的布拉格光栅

本申请涉及具有硅化物涂层分段的布拉格光栅，揭示了包括布拉格光栅的结构和制造包括布拉格光栅的结构的方法。所述结构包括波导芯和布拉格光栅，所述布拉格光栅具有以与所述波导芯相邻的间隔排列定位的多个分段。每个分段包括一个或多个外表面。所述结构还包括位于各分段的所述一个或多个外表面上的硅化物层。

一种低色散低损耗光子晶体光纤

本发明涉及光纤技术领域，具体涉及一种低色散低损耗光子晶体光纤。具体结构包括：包层，其中包层的中心部分设置为纤芯，在包层内外环分别分布着不同孔径的呈正六边形分布的空气小孔，在包层内环有一个双大孔对称结构。本发明的光子晶体光纤具有低色散、低损耗等优点，在400nm‑1600nm波长范围上都具有很低的限制损耗与较平坦的近零色散系数曲线，尤其在1200nm‑1550nm波长范围上具有可通过调节结构参数调整位置的色散零点。可使用于光纤通信与光纤传感等方面，且能满足超连续谱实验等特殊应用场景的使用需求。

Optical fiber and optical transmission system

3D printed waveguides and method based on photonic crystal fibers

An optical waveguide is configured to guide an optical beam, and the optical waveguide includes a down-taper element configured to reduce a diameter of an incoming light beam having a random polarization; a dual-core directional coupler element configured to separate the incoming light beam into a horizontally-polarized beam and a vertically-polarized beam, each beam being confined in first and second cores, respectively; and a core fan-out element configured to increase a distance between the horizontally-polarized beam and the vertically-polarized beam upon exit from the core fan-out element. Each of the down-taper element, the dual-core directional coupler element, and the core fan-out element are 3-dimensional, 3D, printed using a single material.

Optical fiber, and method of manufacturing and of operating

The invention concerns an optical fiber (1) for radiation generation, concentration and transfer. The optical fiber comprises at least one luminescence generating zone of a first material comprising a luminescence generating material for providing an emitting radiation predominantly at a visible and/or near-infrared wavelength. The optical fiber further comprises at least one wave guiding zone. The at least one wave guiding zone is configured to concentrate the emitted radiation predominantly within the wave guiding zone. This provides distinct locations with different functionality, one location for generating the emitted radiation and the further location for guiding and concentrating of the emitted radiation. Thus, both zones can be specifically designed to provide optimized performance and efficiency.

Faser mit photonischem bandabstand

光ファイバ分布型センサ装置

【課題】空間分解能を維持したまま測定距離や測定範囲、ダイナミックレンジを拡大することが可能な光ファイバ分布型センサ装置の提供。 【解決手段】光ファイバをセンシング媒体とする光ファイバ分布型センサであって、前記センシング媒体の光ファイバは、誘導ラマン散乱により発生するストークス光の波長の透過損失が、入射光やその他の散乱光の波長の透過損失に対して大きくなっていることを特徴とする光ファイバ分布型センサ装置。 【選択図】図３

Optical rejection photonic structures

An integrated device comprising: a plurality of sample wells arranged on a first layer of the integrated device, wherein individual sample wells of the plurality of sample wells are configured to receive a sample labeled with at least one fluorescent marker configured to emit emission light in response to excitation light; a plurality of photodetectors arranged on a second layer of the integrated device and positioned to receive photons of emission light emitted from the plurality of sample wells, wherein individual sample wells of the plurality of sample wells align with at least one photodetector of the plurality of photodetectors; and at least one photonic structure positioned between an individual sample well and its respective at least one photodetector, the at least one photonic structure configured to attenuate the excitation light relative to the emission light, wherein a signal generated by the at least one photodetector indicates detection of photons of emission light.

一种抑制受激布里渊散射的单模光纤

本发明提供一种抑制受激布里渊散射的单模光纤，涉及光纤领域；单模光纤包括：纤芯，由第一种材料的玻璃棒堆积而成；第一种材料具有第一折射率n 1 和第一声音传播速率v 1 ；内包层，包括第一内包层结构、第二内包层结构和第三内包层结构；第一内包层结构由第二种材料的玻璃管堆积而成；第三内包层结构设置在第一内包层结构的外侧，由第二种材料制成；第二内包层结构贯穿第一内包层结构，由通道单元连续排列而成；通道单元为第二种材料的玻璃棒或第二种材料与第三种材料构成的同心玻璃棒；第二种材料具有第二折射率n 2 和第二声音传播速率v 2 ；第三种材料具有第三折射率n 3 ；其中，n 1 ≤n 2 ，n 2 ＞n 3 ，1≤v 1 /v 2 ≤1.1；本发明能够有效地抑制受激布里渊散射。

一种低色散低损耗光子晶体光纤

本发明涉及光纤技术领域，具体涉及一种低色散低损耗光子晶体光纤。具体结构包括：包层，其中包层的中心部分设置为纤芯，在包层内外环分别分布着不同孔径的呈正六边形分布的空气小孔，在包层内环有一个双大孔对称结构。本发明的光子晶体光纤具有低色散、低损耗等优点，在400nm‑1600nm波长范围上都具有很低的限制损耗与较平坦的近零色散系数曲线，尤其在1200nm‑1550nm波长范围上具有可通过调节结构参数调整位置的色散零点。可使用于光纤通信与光纤传感等方面，且能满足超连续谱实验等特殊应用场景的使用需求。

一种同时测量双参数的传感器及其制备方法

本发明属于光纤传感领域，尤其涉及一种同时测量双参数的传感器及其制备方法。包括晶体光纤、毛细玻璃管和两个单模光纤；所述晶体光纤的一端熔接毛细玻璃管的一端，晶体光纤的另一端熔接单模光纤，毛细玻璃管的另一端熔接单模光纤；所述晶体光纤与毛细玻璃管熔接的一端为封堵端，所述封堵端上开设有一个空气孔与外界联通，本传感器可以实现弯曲信息和温度信息的线性反映，整体结构简单，造价低廉，便于大规模的生产和使用，测量快速。本发明提供的制备方法，选晶体光纤、毛细玻璃管和两个单模光纤为素材，进行熔接操作，选材便利，操作简单，便于大规模的生产和使用，可以适配多种应用场景。

Shunt fiber

Shunt fibers having a photonic bandgap cladding region including one or more hollow guiding regions of which one guiding region is configured as the core and one or more other guiding regions are configured as shunts, respectively, provide nearly single mode transmission in the core. The effective mode index of unwanted core modes and modes in one or more shunts are matched closely enough such that higher order modes will selectively couple to the shunt modes by resonant phase matching in the presence of fiber variations. The shunts are designed to have relatively higher losses thereby effectively dissipating power in the higher order modes at a faster rate.

基于全波混合谱元法的液晶填充的光子晶体光纤分析方法

基于全波混合谱元法的液晶填充的光子晶体光纤分析方法，涉及光子晶体光纤。根据实体模型，选取出不重复计算的计算区域，对计算区域进行有限个子域的网格剖分，每个子域单元被剖分为四边形结构。利用了全波亥姆霍兹方程与高斯定律相结合的方式，并且由高斯‑勒让德‑洛巴托多项式构造基函数，以TM模式与TE模式相互耦合的全波计算方式来得到复杂媒介光子晶体的能带特性，该方法可以抑制零伪模式的产生。对液晶填充的光子晶体通过全波混合谱元法计算，可得到不同参数下的不同的光子带隙，即实现光子晶体光纤对传输光谱的灵活控制，克服了传统的光子晶体光纤一旦被拉制完成，其传输特性就不再发生变化的问题。

Fibre-optic light source with amplified spontaneous emission and a method for generating light using amplified spontaneous emission

A fibre-optic light source with amplified spontaneous emission comprises a laser module, a microfluidic pump and a fluorescent compound solution. The laser module (2) emitting a beam with a wavelength matched to the fluorescent compound used, and the microfluidic pump (3) feeding, into the core of the anti-resonant fibre ARF (1), a fluorescent compound solution with a refractive index lower than that of the material what the anti-resonant fibre ARF (1) is made of are connected to the anti-resonant fibre ARF (1) by a reservoir (4). A method for generating light using amplified spontaneous emission, in which a light beam coming from a laser module is interacted with a fibre for the excitation of amplified spontaneous emission is featured in that the light beam from the laser module is fed into the core of an anti-resonant fibre ARF, (1) filled with a fluorescent compound solution with a refractive index lower than that of the material what the anti-resonant fibre ARF (1) is made of. The core of the fibre-optic is a light guiding core with low loss both for the wavelength of the pumping laser (2) and the fluorescent signal.

표시 방법, 표시 장치 및 도파체

본 발명의 일 측면에 따르면, 표시 방법이 개시된다. 본 발명의 일 실시예에 따른 표시 방법은 소정의 환경 정보를 감지하는 단계; 감지된 환경 정보에 상응하는 색 또는 파장을 선택하는 단계; 선택된 색 또는 파장에 따른 광이 도파 영역으로 입사되는 단계; 입사된광이 도파 영역에서 진행되는 단계; 및 진행 중인 광이, 전반사조건 중 하나 이상이 불만족되는 도파 영역의 형태 또는 재질에 의하여, 외부로 방출되는 단계를 포함한다. 본 발명에 의하면, 특정 위치에서 입사된 광이 방출되어 미리 설정된 색을 표시하도록 하여, 도파체가 장착된 물체에 대한 장식 효과 및 경보 효과가 있다. 도파체, 전반사 조건, 광 방출, 경보, 장식, 광섬유

光抑制光子结构

本发明公开了用于并行分析样品的集成装置以及相关仪器及系统。该集成装置可包含配置于其表面上的样品孔，其中个别样品孔经配置以接收经至少一种荧光标记物标记的样品，该至少一种荧光标记物经配置以响应于激发光发射发射光。该集成装置可进一步包含定位于该集成装置的层中的光检测器，其中一或多个光检测器经定位以接收自样品孔发射的发射光的光子。该集成装置进一步包含一或多个定位于这些样品孔与这些光检测器之间的光子结构，其中该一或多个光子结构经配置以相对于该发射光衰减该激发光，从而由该一或多个光检测器生成的信号指示检测到发射光的光子。

대면적 모드 분포를 가지는 광섬유

본 발명은 대면적 모드 분포를 가지는 광섬유에 관한 것으로서, 더욱 상세하게는, 코어(core) 및, 코어 주변의 다수의 측부 로드(side rods)를 구비하며, 2μm 파장 근방에서 0 또는 0과 값의 가까운 음의 분산 특성을 나타내는 광섬유에 관한 것이다. 본 발명에 의하면, 광섬유의 코어를 통하여는 기본 모드(fundamental mode)만 통과하고, 고차 모드(higher order mode)들은 광섬유가 구부러지게 되면 빠져나가게 되며, 또한 2μm 파장 근방에서 0 또는 0과 가까운 값의 음(negative)의 분산 특성을 가지는 대면적 모드 분포를 가지는 광섬유를 제공한다.

基于全波混合谱元法的液晶填充的光子晶体光纤分析方法

基于全波混合谱元法的液晶填充的光子晶体光纤分析方法，涉及光子晶体光纤。根据实体模型，选取出不重复计算的计算区域，对计算区域进行有限个子域的网格剖分，每个子域单元被剖分为四边形结构。利用了全波亥姆霍兹方程与高斯定律相结合的方式，并且由高斯‑勒让德‑洛巴托多项式构造基函数，以TM模式与TE模式相互耦合的全波计算方式来得到复杂媒介光子晶体的能带特性，该方法可以抑制零伪模式的产生。对液晶填充的光子晶体通过全波混合谱元法计算，可得到不同参数下的不同的光子带隙，即实现光子晶体光纤对传输光谱的灵活控制，克服了传统的光子晶体光纤一旦被拉制完成，其传输特性就不再发生变化的问题。

一种抑制受激布里渊散射的单模光纤

本发明提供一种抑制受激布里渊散射的单模光纤，涉及光纤领域；单模光纤包括：纤芯，由第一种材料的玻璃棒堆积而成；第一种材料具有第一折射率n 1 和第一声音传播速率v 1 ；内包层，包括第一内包层结构、第二内包层结构和第三内包层结构；第一内包层结构由第二种材料的玻璃管堆积而成；第三内包层结构设置在第一内包层结构的外侧，由第二种材料制成；第二内包层结构贯穿第一内包层结构，由通道单元连续排列而成；通道单元为第二种材料的玻璃棒或第二种材料与第三种材料构成的同心玻璃棒；第二种材料具有第二折射率n 2 和第二声音传播速率v 2 ；第三种材料具有第三折射率n 3 ；其中，n 1 ≤n 2 ，n 2 ＞n 3 ，1≤v 1 /v 2 ≤1.1；本发明能够有效地抑制受激布里渊散射。

A method of manufacturing an active optical fibre and the active optical fibre

A method of manufacturing an active optical fibre conducting and generating radiation having a wavelength λ according to the invention includes a step of preparing a core sub-preform of glass doped with an active dopant and a step of drawing the core sub-preform along with a cladding preform. In the step of making the core sub-preform, a structural preform is compiled, said preform containing at least glass rods made of a first type of glass having a first refractive index n 1 and glass rods made of a second type of glass having a second refractive index n 2 . The rods are arranged according to a selected pattern to provide the assumed refractive index profile. The second refractive index n 2 is higher than or equal to the highest value of the refractive index profile assumed for the core, and the first refractive index n 1 has a value lower than or equal to the lowest value of the assumed refractive index profile in the core cross-section. At least the second type of glass contains at least one active dopant. The structural preform is subjected to thinning by drawing in order to obtain a core preform. Dimensions of the rods and process parameters of the f drawing of the structural preform and the sub-preform of the core with cladding are selected such that the glass rods thinned as a result of drawing, and constituting elongate core elements of the final optical fibre, have transverse dimensions smaller than 1/5 of the wavelength λ. The active optical fibre according to the invention is adapted to conduct and generate radiation having a wavelength λ. It is provided with a cladding and a core containing at least one active dopant, characterised in that the core comprises elongate elements made of a first type of glass having a first refractive index n 1 and elongate elements of a second type of glass having a second refractive index n 2 , oriented along the optical fibre and forming a compact bundle, wherein transverse dimensions of the elongate core elements are ...

표시 방법, 표시 장치 및 도파체

본 발명의 일 측면에 따르면, 표시 방법이 개시된다. 본 발명의 일 실시예에 따른 표시 방법은 소정의 환경 정보를 감지하는 단계; 감지된 환경 정보에 상응하는 색 또는 파장을 선택하는 단계; 선택된 색 또는 파장에 따른 광이 도파 영역으로 입사되는 단계; 입사된광이 도파 영역에서 진행되는 단계; 및 진행 중인 광이, 전반사조건 중 하나 이상이 불만족되는 도파 영역의 형태 또는 재질에 의하여, 외부로 방출되는 단계를 포함한다. 본 발명에 의하면, 특정 위치에서 입사된 광이 방출되어 미리 설정된 색을 표시하도록 하여, 도파체가 장착된 물체에 대한 장식 효과 및 경보 효과가 있다. 도파체, 전반사 조건, 광 방출, 경보, 장식, 광섬유

Shunt fiber

一种宽范围多波段热光开关及其制作方法

本发明公开了一种宽范围多波段热光开关及其制作方法，该方法利用大气压压力及毛细作用将液晶全填充到光子晶体光纤中，然后用光纤切割刀把全填充的光子晶体光纤和单模光纤端面切割平整放在光纤熔接机上，将单模光纤与液晶全填充的光子晶体光纤熔接在一起。然后将液晶填充光子晶体光纤放在高精度数显恒温加热台上，将其两端的单模光纤分别接在宽带光源和光谱仪上。在液晶清亮温度附近，液晶折射率会发生剧烈变化，进而引起光子带隙移动。在光子带隙和干涉共同作用下，透射光谱会发生剧烈移动，进而形成热光开关S1,S2,S3和S4四个主要热光开关。热光开关不仅具有高的消光比，宽的控制范围，还能同时控制两个通信窗口波段。

Photonic band gap fiber

A photonic bandgap fiber includes a first core having a refractive index equal to or smaller than a refractive index of a cladding, a second core that is provided to surround the first core and has a refractive index smaller than the refractive index of the first core, the cladding that surrounds the second core, and a periodic structure portion that is provided in the cladding around the second core, and in which high-refractive index portions having a refractive index larger than the refractive index of the cladding form a periodic structure. The periodic structure is configured such that at least the propagation constant of the fundamental mode at a wavelength to be used is in a photonic bandgap, and the propagation constant of a higher-order mode at the wavelength to be used is outside of the photonic bandgap.

光ファイバ及び光伝送システム

本発明の光ファイバは、コアと、前記コアの外周部に設けられ、前記コア領域よりも低い屈折率がクラッドと、を有する。本発明の光ファイバにおいて、ＬＰ０２モードの正規化周波数を表すＶ値は、４．８以上６．４以下である。

Method for the fabrication of optical waveguide devices in photonic crystal fibers and in waveguides with hollow structures

There is provided a method to fabricate optical taps and waveguide devices in photonic crystal fibers and other fibers with hollow structures. The method involves a preparation step, where the hollow holes inside the fiber are collapsed or partially modified locally; and a waveguide fabrication step, where a femtosecond laser is focused inside the fiber and used to produce optical waveguides that interact in the region that was previously modified in the preparation step.

Polarization-Maintaining Photonic Crystal Fiber

Certain exemplary embodiments can provide a system, machine, device, manufacture, circuit, and/or composition of matter, and/or a method for activities, that can comprise and/or relate to, a polarization-maintaining photonic crystal fiber comprising an elongated guiding core and/or an elongated photonic crystal cladding surrounding the core, the cladding defining a plurality of holes.

一种基于双椭圆金层的长带宽高消光光子晶体光纤滤波器

本发明公开了一种基于双椭圆金层的长带宽高消光光子晶体光纤滤波器，属于光纤滤波技术领域。解决了现有光子晶体光纤滤波器结构长带宽但消光比低的技术问题。其技术方案为：该光子晶体光纤滤波器包括基底材料以及分布于基底材料中的多个大圆形空气柱、多个小圆形空气柱和两个内壁附有金层的椭圆形空气柱；其中多个小圆形空气柱与多个大圆形空气、两个椭圆形空气柱分布呈多层菱形结构，多层菱形结构的内层围绕的区域构成纤芯，多个小圆形空气柱沿y轴方向上分布，多个大圆形空气沿x轴方向上分布。本发明的有益效果为：该光子晶体光纤滤波器利用不对称排布的空气柱以及SPR效应，具有长带宽、高消光比以及结构简单的优良特性。

一种同时测量双参数的传感器及其制备方法

本发明属于光纤传感领域，尤其涉及一种同时测量双参数的传感器及其制备方法。包括晶体光纤、毛细玻璃管和两个单模光纤；所述晶体光纤的一端熔接毛细玻璃管的一端，晶体光纤的另一端熔接单模光纤，毛细玻璃管的另一端熔接单模光纤；所述晶体光纤与毛细玻璃管熔接的一端为封堵端，所述封堵端上开设有一个空气孔与外界联通，本传感器可以实现弯曲信息和温度信息的线性反映，整体结构简单，造价低廉，便于大规模的生产和使用，测量快速。本发明提供的制备方法，选晶体光纤、毛细玻璃管和两个单模光纤为素材，进行熔接操作，选材便利，操作简单，便于大规模的生产和使用，可以适配多种应用场景。

一种低色散低损耗光子晶体光纤

本发明涉及光纤技术领域，具体涉及一种低色散低损耗光子晶体光纤。具体结构包括：包层，其中包层的中心部分设置为纤芯，在包层内外环分别分布着不同孔径的呈正六边形分布的空气小孔，在包层内环有一个双大孔对称结构。本发明的光子晶体光纤具有低色散、低损耗等优点，在400nm‑1600nm波长范围上都具有很低的限制损耗与较平坦的近零色散系数曲线，尤其在1200nm‑1550nm波长范围上具有可通过调节结构参数调整位置的色散零点。可使用于光纤通信与光纤传感等方面，且能满足超连续谱实验等特殊应用场景的使用需求。

一种基于双椭圆金层的长带宽高消光光子晶体光纤滤波器

本发明公开了一种基于双椭圆金层的长带宽高消光光子晶体光纤滤波器，属于光纤滤波技术领域。解决了现有光子晶体光纤滤波器结构长带宽但消光比低的技术问题。其技术方案为：该光子晶体光纤滤波器包括基底材料以及分布于基底材料中的多个大圆形空气柱、多个小圆形空气柱和两个内壁附有金层的椭圆形空气柱；其中多个小圆形空气柱与多个大圆形空气、两个椭圆形空气柱分布呈多层菱形结构，多层菱形结构的内层围绕的区域构成纤芯，多个小圆形空气柱沿y轴方向上分布，多个大圆形空气沿x轴方向上分布。本发明的有益效果为：该光子晶体光纤滤波器利用不对称排布的空气柱以及SPR效应，具有长带宽、高消光比以及结构简单的优良特性。

具有硅化物涂层分段的布拉格光栅

本申请涉及具有硅化物涂层分段的布拉格光栅，揭示了包括布拉格光栅的结构和制造包括布拉格光栅的结构的方法。所述结构包括波导芯和布拉格光栅，所述布拉格光栅具有以与所述波导芯相邻的间隔排列定位的多个分段。每个分段包括一个或多个外表面。所述结构还包括位于各分段的所述一个或多个外表面上的硅化物层。

用于用空芯光纤传输脉冲激光辐射的设备和方法

一种用于传输具有在压缩的脉冲持续时间的情况下导致高强度激光脉冲(3C)的脉冲能量的脉冲激光辐射的设备(11)包括：脉冲持续时间设定设备(13)、空芯光纤(1)和光纤耦合输入设备(17)。所述脉冲持续时间设定设备构造用于接收所述脉冲激光辐射并且用于设定所述激光辐射的传输脉冲持续时间(Δt_t)。所述空芯光纤具有由材料(4B)包围的中空芯部(4A)的，其中，所述空芯光纤(1)将在第一光纤端(1A)处耦合输入的激光脉冲(3B)在所述中空芯部(4A)中传输到第二光纤端(1B)并且在所述第二光纤端将所述激光脉冲输出。设置，以存在于所述第一光纤端(1A)处的射束走向参数值(X，α)运行所述空芯光纤(1)，所述射束走向参数值位于目标容差范围(ΔX_S)内。所述光纤耦合输入设备设置用于，接收设定为所述传输脉冲持续时间(Δt_t)的激光辐射并且以射束走向参数值(X，α)将所述激光辐射耦合输入到所述空芯光纤(1)中，所述射束走向参数值位于所述目标容差范围(ΔX_S)内。以这样的方式设定所述传输脉冲持续时间(Δt_t)，使得针对在所述目标容差范围(ΔX_S)内的所有射束走向参数值(X，α)给出所述激光辐射到所述中空芯部(4A)中的如下耦合输入：在所述耦合输入的情况下，保留所述空芯光纤(1)的材料和/或结构(37)。

一种抑制受激布里渊散射的单模光纤

本发明提供一种抑制受激布里渊散射的单模光纤，涉及光纤领域；单模光纤包括：纤芯，由第一种材料的玻璃棒堆积而成；第一种材料具有第一折射率n 1 和第一声音传播速率v 1 ；内包层，包括第一内包层结构、第二内包层结构和第三内包层结构；第一内包层结构由第二种材料的玻璃管堆积而成；第三内包层结构设置在第一内包层结构的外侧，由第二种材料制成；第二内包层结构贯穿第一内包层结构，由通道单元连续排列而成；通道单元为第二种材料的玻璃棒或第二种材料与第三种材料构成的同心玻璃棒；第二种材料具有第二折射率n 2 和第二声音传播速率v 2 ；第三种材料具有第三折射率n 3 ；其中，n 1 ≤n 2 ，n 2 ＞n 3 ，1≤v 1 /v 2 ≤1.1；本发明能够有效地抑制受激布里渊散射。

一种空气孔填充液晶的菱形双芯光子晶体光纤偏振分束器

本发明公开了一种空气孔填充液晶的菱形双芯光子晶体光纤偏振分束器，包括纤芯区域和包层区域；其中，包层区域位于纤芯区域的外侧；纤芯区域包括第一圆孔气孔、第一纤芯和第二纤芯，第一圆空气孔位于纤芯区域的正中心，其内部完全填充向列项液晶材料；第一纤芯和第二纤芯位于第一圆空气孔两侧；包层区域包括多个第二圆空气孔、多个第三圆空气孔以及多个第四圆空气孔；第一纤芯、第二纤芯、多个第二圆空气孔、多个第三圆空气孔以及多个第四圆空气孔环绕第一圆孔气孔呈多层排布结构，且多层排布结构的每一层均为菱形结构。本发明结构简单，长度较短，能够在全光通信系统等方面发挥重要作用。

一种大模场面积光子晶体光纤

一种大模场面积光子晶体光纤，属于光学与激光光电子技术领域。该大模场面积光子晶体光纤基本结构由内及外依次为位于光纤几何中心的低折射率实芯纤芯、空气孔周期性排布的高折射率内包层区域以及一圈微毛细管围绕而成的外包层。内包层包含有一圈或多圈空气孔，每圈空气孔中心连线构成一个正六边形。本发明相比于传统实芯光纤，具有弯曲损耗小、非线性阈值高、泵浦效率高和单模传输的特点。它在高功率光纤激光器、光纤放大器等领域有着很高的应用潜力。

一种宽范围多波段热光开关及其制作方法

本发明公开了一种宽范围多波段热光开关及其制作方法，该方法利用大气压压力及毛细作用将液晶全填充到光子晶体光纤中，然后用光纤切割刀把全填充的光子晶体光纤和单模光纤端面切割平整放在光纤熔接机上，将单模光纤与液晶全填充的光子晶体光纤熔接在一起。然后将液晶填充光子晶体光纤放在高精度数显恒温加热台上，将其两端的单模光纤分别接在宽带光源和光谱仪上。在液晶清亮温度附近，液晶折射率会发生剧烈变化，进而引起光子带隙移动。在光子带隙和干涉共同作用下，透射光谱会发生剧烈移动，进而形成热光开关S1,S2,S3和S4四个主要热光开关。热光开关不仅具有高的消光比，宽的控制范围，还能同时控制两个通信窗口波段。

一种高双折射低限制损耗光子准晶光纤

本发明涉及一种光子准晶光纤，具体涉及一种高双折射低限制损耗光子准晶光纤，光纤包层上分布有八重型光子准晶结构排布的第一空气孔，在第二层、第三层和第四层所构成的每个菱形区域内嵌入了一个直径小于第一空气孔的第二空气孔，在光纤纤芯区域周围分布有6个圆形空气孔，包括2个直径小于第二空气孔的第三空气孔和4个直径小于第三空气孔的第四空气孔，且这2个第三空气孔与纤芯处的虚拟椭圆相切；光纤以Ge 20 Sb 15 Se 65 玻璃为基底材料。该准晶体光纤在包层处插入八个半径较小的空气孔，使得限制损耗更低；该光子准晶光纤采用全圆空气孔，制作难度大大降低，在实现高双折射的同时保持了低限制损耗的特点。

一种芯径45微米以上可弯曲全固态单偏振光子带隙光纤

本发明公开了一种芯径45微米以上可弯曲全固态单偏振光子带隙光纤，这种光纤的结构包括由内到外依次纤芯区域、高折射率棒区、应力硼棒阵列区和光纤包层基底区，高折射率棒区设置沿光纤轴向分布且贯穿整根光纤的高折射棒，应力硼棒阵列区内设置沿光纤轴向分布且贯穿整根光纤的掺硼石英棒使有源微结构光纤出射的光为单偏振光，最内层为有源掺杂，如掺镱、掺铒、掺铥、掺钕或无源纤芯，基底区为石英、塑料、软玻璃如硫系玻璃、亚蹄酸盐玻璃、氟化物玻璃等。本发明的技术效果是，在纤芯直径大于45微米的情况下，同时实现单模传输和低弯曲损耗，且能实现单偏振性质，解决了单偏振光纤在高功率下的非线性效应问题。

基于应力分布各向异性的抗扭转实芯保偏光子晶体光纤

本发明属于光纤传感领域，具体涉及一种基于应力分布各向异性的抗扭转实芯保偏光子晶体光纤，其包层包括围绕纤芯排列的内层区域以及位于内层区域和包层外壁之间的外层区域；内层区域具有用于构建光学特性的多层空气孔并且中心具有沿x轴排列的两个微米级空气孔，形成形状双折射；外层区域包括沿y轴径向排列的多层空气孔；通过调整外层区域的多层空气孔的孔径大小、数量和排列方式中的一个或多个使得光子晶体光纤沿x轴和y轴的弯曲强度不同。本发明在保证光纤光学特性满足要求的基础上，基于应力分布在径向上的各向异性，使光子晶体光纤具有一定抗扭转的能力，有利于降低磁光法拉第效应所产生的非互易相位差。

Device and method for transporting pulsed laser radiation with a hollow core optical fiber

A device for transporting pulsed laser radiation includes a pulse duration setting device configured for setting a transport pulse duration of the pulsed laser radiation. the device further includes a hollow core optical fiber having a hollow core surrounded by a material. The hollow core optical fiber is configured to be operated with beam path parameter values that are present at the first fiber end and lie in a target tolerance range. The device further includes a fiber input coupling device configured to couple the pulsed laser radiation into the hollow core optical fiber with the beam path parameter values that lie in the target tolerance range. the transport pulse duration is set so that input coupling of the pulsed laser radiation into the hollow core is provided for all of the beam path parameter values in the target tolerance range.

光抑制光子结构

本发明公开了用于并行分析样品的集成装置以及相关仪器及系统。该集成装置可包含配置于其表面上的样品孔，其中个别样品孔经配置以接收经至少一种荧光标记物标记的样品，该至少一种荧光标记物经配置以响应于激发光发射发射光。该集成装置可进一步包含定位于该集成装置的层中的光检测器，其中一或多个光检测器经定位以接收自样品孔发射的发射光的光子。该集成装置进一步包含一或多个定位于这些样品孔与这些光检测器之间的光子结构，其中该一或多个光子结构经配置以相对于该发射光衰减该激发光，从而由该一或多个光检测器生成的信号指示检测到发射光的光子。

光纤和光传输系统

本发明的光纤具有芯以及被设置在前述芯的外周部并且折射率比前述芯区域低的包层。在本发明的光纤中，表示LP 02 模式的归一化频率的V值是4.8以上6.4以下。

基于全波混合谱元法的液晶填充的光子晶体光纤分析方法

基于全波混合谱元法的液晶填充的光子晶体光纤分析方法，涉及光子晶体光纤。根据实体模型，选取出不重复计算的计算区域，对计算区域进行有限个子域的网格剖分，每个子域单元被剖分为四边形结构。利用了全波亥姆霍兹方程与高斯定律相结合的方式，并且由高斯‑勒让德‑洛巴托多项式构造基函数，以TM模式与TE模式相互耦合的全波计算方式来得到复杂媒介光子晶体的能带特性，该方法可以抑制零伪模式的产生。对液晶填充的光子晶体通过全波混合谱元法计算，可得到不同参数下的不同的光子带隙，即实现光子晶体光纤对传输光谱的灵活控制，克服了传统的光子晶体光纤一旦被拉制完成，其传输特性就不再发生变化的问题。