Detection device and method for high-power semiconductor laser

The invention discloses detection device and method for a high-power semiconductor laser. The device comprises a test bar, a test bar fixing clamp, a condenser lens, a light guide optical fiber and a detector; the test bar is formed by gluing oblique sections of two transparent material bars with the same structure in an opposite and coaxial way, wherein one end of each transparent material bar has a 45 degree oblique section and is plated with a high reflective film specific to the wavelength of a laser diode, and the other end of each transparent material bar has a regular round section; the test bar is arranged on the test bar fixing clamp; the condenser lens is arranged outside one end or two ends of the test bar; and one end of the light guide optical fiber is positioned at the focusof the condenser lens and the other end is connected with the input end of the detector. The invention is applicable to the measurement of high-power semiconductor laser modules of semi-circle shapedor ...

Multichannel-to-multichannel non-blocking mechano-optical switch

A multichannel-to-multichannel non-blocking mechano-optical switch for cross connection of optical fibres and optical channel switching in optical fibre communication is disclosed, which contains n movable composite reflectors with 2D symmetrical optical channels. Said composite reflector is composed of two parallel sub-reflectors made of transparent material and with same shape, size and thickness. The half of the opposite internal surface of said sub-reflector has high-reflectivity film and another half is transparent. Their external surface has transmission-improving film. Its advantages include less moving units, no blocking, broad bandwidth, compact structure and light weight.

Optical fibre Sagnac loop dynamic weighing sensor

The invention relates to a fiber Sagner loop dynamic weighing sensor. In the sensor, a tail fiber of a light source module is connected with a first port of a fiber circulator; a second port of the fiber circulator is connected with a first port of a fiber coupler; a third port and a fourth port of the fiber coupler are connected to form a loop circuit by fibers; a fiber polarization controller, a fiber protection and enhancement sensing head and a piezoceramics actuator are connected in series to the loop circuit; a third port of the fiber circulator is connected with an input terminal of a first photodetection unit; a second port of the fiber coupler is connected with an input terminal of a second photodetection unit; an output terminal of the first photodetection unit is connected with a data acquisition card; an output terminal of the second photodetection unit is connected with the data acquisition card; the data acquisition card is connected with an input terminal of the piezoceramics ...

Optical fiber raster wavelength demodulator

It is a kind of fiber grating wavelength demodulator. It includes the MZI, which is made up of the second 2X2 fiber coupler and one 3X3 fiber coupler. A broadband light source is linked to a sensing fiber and grating through the first 2X2 fiber coupler, whose second input port is linked to either port of the second 2X2 fiber coupler's input ports. The MZI's 3 output ports will go into the photoelectricity detecing circuit, which linked to the computer through the data collecting card. The merits of this invention is that it is passive, and has simple structure, high sensitivity, large area of dynamic range. Besides, it can work stably and can resist the effect of the light source's fluctuation.

Polarizing membrane dispersion compensator based on optical fiber raster

The dispersion compensator includes a preexposured linear chirp fiber grating and a regular linear chirp fiber grating. There is metal film on surface of the fiber grating. An extraction electrode is setup at two ends of the metal film. Two tail fibers of a polarization beam splitter are connected to the said preexposured linear chirp fiber grating and the regular linear chirp fiber grating. The input end of the polarization beam splitter is connected to polarization controller and circulator. Advantages are: simple preparation, and easy of dynamic adjustment.

Optical fiber coupling outputting vertical cavity surface emitting semiconductor laser device

The invention relates to a fiber coupling output and vertical-cavity surface-emitting semiconductor laser, which comprises a vertical-cavity surface-emitting semiconductor laser. A collimating lens, a first half-wave plate and a polarization beam splitting prism are arranged in sequence along the output light direction of the vertical-cavity surface-emitting semiconductor laser; the polarization beam splitting prism splits the output light of the vertical-cavity surface-emitting semiconductor laser into p polarized light and s polarized light; the polarization state of the p polarized light is maintained; the s polarized light is transformed into p polarized light; and the two paths of p polarized light are integrated and output, thereby realizing the stable single-polarization output. The semiconductor laser has the advantages of low cost, optical fiber coupling, high power and stable single-polarization output, and is applicable to the optical fiber communication, optical interconnection ...

Bidirectional stress tuner of optical fibre raster

A bidirectional stress tuner of optical fibre raster for tuning peak wavelength of optical fibre raster is composed of the first and the second horizontal arms for fixing the optical fibres at both end of raster to them, and guide track with normal triangular internal cavity for containing said raster in it. Said two horizontal arms are electromagnetically coupled to drive mechanism to move closeto or far from each other, so compressing or stretching the raster. Its advantages include uniform stress, no deformation, no increasement of reflection bandwidth, and better turning renaturation.

Device for stabilizing posture of photoelectric instruments

The invention relates to a device for stabilizing posture of photoelectric instruments used in pairs on a moving carrier with shake, which is characterized in that the photoelectric instruments are fixed on the moving carrier through a rotary bearing and a bracket and rigidly connected with heavy cones through connecting rods. The device has the characteristics of simple structure, convenient use, no operation and low cost.

Two-dimensional laser autocollimator

The invention relates to a two-dimensional laser autocollimator. The autocollimator comprises a generation device of left-hand and right-hand circular polarized light with reticule information on a horizontal optical axis, as well as a first common beam splitter prism, a collimating object lens and a target reflector which are sequentially arranged in the horizontal optical axis direction and the advance direction of a 'cross' light beam, wherein the generation device generates the left-hand and right-hand circular polarized light with the reticule information to form centrosymmetric 'cross' light beam output; the beam-splitting plane of the first common beam splitter prism is in a 45-degree included angle with the horizontal optical axis; a first lambda/4 wave plate, a first polarization splitting prism and a horizontal linear array CCD are sequentially arranged on one side of the first common beam splitter prism; and a vertical linear array CCD is arranged in the reflected light direction ...

Bidirectional stress tuner of optical fibre raster

Ultra-short pulse width self-correlation survey meter based on optical fibre device

An ultra-short pulse width self-correlation survey meter based on an optical fibre device comprises a fibre optic coupler of 1:1, a first fibre collimator, a first high reflection mirror, a first optical fibre polarization controller, a second fibre collimator, a second high reflection mirror, a micro platform, a second optical fibre polarization controller, a third fibre collimator, a KTP frequency doubling crystal, a large core fibre, a spectrometer and a computer. The invention has the advantages of compact structure, simple adjustment and convenient use.

Method for mfg. sampling optic fibre grating

cylindrical torsion tuning optical fiber grating sensing demodulator

A cylinder torsion tunnel optical fibre raster sensing demodulator features that the optical fibre segment containing optical fibre raster is stuck on the surface of a cylinder at an angle, said cylinder has one end fixed by a fixture and the other end installed in bearing bridge in rotary mode, and a driving connection-rod connected to motor is transversely installed to the movable end of said cylinder. Its advantages are simple structure and high stability and reliability.

Metallic material corrosion optical fiber grating sensing head

The invention discloses a fiber grating sensing head of the corrosion of metal materials, which is characterized in that the fiber grating sensing head comprises a cylindrical shell, a plunger ring fixes a round plate of the metal materials to be detected for the corrosion at one end of the cylindrical shell, thus forming a built-in round plate structure; inner screw threads are arranged at the other end of the cylindrical shell and used for embedding a matched supporting plate with outer screw threads, a through hole is arranged in the circle center of the supporting plate, a fiber grating fixing holder is fixed outside the supporting plate and coaxial with the cylindrical shell, a pressure spring is fixed between the supporting plate and the round plate, a kicker fixedly connected with the pressure spring presses on the circle center of the round plate under the thrust force of the pressure spring, one end of a sensing fiber grating runs through the through hole of the supporting plate ...

Optical fibre Sagnac loop dynamic weighing sensor

The invention relates to a fiber Sagner loop dynamic weighing sensor. In the sensor, a tail fiber of a light source module is connected with a first port of a fiber circulator; a second port of the fiber circulator is connected with a first port of a fiber coupler; a third port and a fourth port of the fiber coupler are connected to form a loop circuit by fibers; a fiber polarization controller, a fiber protection and enhancement sensing head and a piezoceramics actuator are connected in series to the loop circuit; a third port of the fiber circulator is connected with an input terminal of a first photodetection unit; a second port of the fiber coupler is connected with an input terminal of a second photodetection unit; an output terminal of the first photodetection unit is connected witha data acquisition card; an output terminal of the second photodetection unit is connected with the data acquisition card; the data acquisition card is connected with an input terminal of the piezoceramics ...

用于包层泵浦光纤放大器和激光器的多光束合波分波器

... 一种用于包层泵浦光纤放大器和激光器的多光束合波分波器，其结构是信号光源发射的信号光经单模光纤通过耦合元件进入双包层光纤的纤芯，泵浦光源发射的光束通过耦合元件进入双包层光纤的内包层。其中关键的耦合元件是双色平面镜加偏振膜板的合波，或是自聚焦透镜和直角棱镜的组合，或是自聚焦透镜，直角棱镜与偏振膜板的组合，或是自聚焦透镜和双面双色膜棱镜的组合，或是侧面光栅耦合，或是多段光纤光栅的耦合。 ...

窄线宽选频全光纤可调延时线

... 一种窄线宽选频全光纤可调延时线，主要包括带有三个端口的光纤环行器和由N≥2段延时光纤与N≥2个调谐光纤光栅相互间隔串联构成的选频可调延时线。其中至少有一个调谐光纤光栅带有分布式微加热器。光脉冲信号从光纤环行器输入端口输入后，进入选频可调延时线，到达第一个调谐光纤光栅被反射回来，当第一个调谐光纤光栅经过调谐后，光脉冲信号通过第一个调谐光纤光栅，经过第二段延时光纤后，到达第二个调谐光纤光栅被反射。依此类推，能够动态地获得不同的延时量。本发明是一种全光纤器件。具有时延量可调、精度高、机动性强的优点，应用广泛。 ...

Detection device and method for high-power semiconductor laser

The invention discloses detection device and method for a high-power semiconductor laser. The device comprises a test bar, a test bar fixing clamp, a condenser lens, a light guide optical fiber and a detector; the test bar is formed by gluing oblique sections of two transparent material bars with the same structure in an opposite and coaxial way, wherein one end of each transparent material bar has a 45 degree oblique section and is plated with a high reflective film specific to the wavelength of a laser diode, and the other end of each transparent material bar has a regular round section; the test bar is arranged on the test bar fixing clamp; the condenser lens is arranged outside one end or two ends of the test bar; and one end of the light guide optical fiber is positioned at the focus of the condenser lens and the other end is connected with the input end of the detector. The invention is applicable to the measurement of high-power semiconductor laser modules of semi-circle shaped or ...

Ultra-short pulse width self-correlation survey meter based on optical fibre device

An ultra-short pulse width self-correlation survey meter based on an optical fibre device comprises a fibre optic coupler of 1:1, a first fibre collimator, a first high reflection mirror, a first optical fibre polarization controller, a second fibre collimator, a second high reflection mirror, a micro platform, a second optical fibre polarization controller, a third fibre collimator, a KTP frequency doubling crystal, a large core fibre, a spectrometer and a computer. The invention has the advantages of compact structure, simple adjustment and convenient use.

Method for mfg. sampling optic fibre grating

A process for etching the sampling optical fibre raster is characterized by that the etched regino on the optical fibre is optically exposed twice with same mask, phase board and position before and after the one end of optical fibre is drawn and in drawing, a spectrometer is used to monitor the variation of Bragg wavelength for the reflection peak in raster center to control the initial phase tobe integer times of "pi".

Strain tuning optical fiber grating sensing demodulator

A strain tuned optical fibre raster sensing demodulator features that an optical fibre-segment containing optical fibre raster is fixed to a casing by two clampers at its both ends and a vibrator fordriving said optical fibre segment to vibrate is also fixed to the casing. Its advantages are simple structure and high stability and reliability.

Reflection type strength tunable electric control diffraction grating and manufacture method thereof

The invention discloses a reflection type strength tunable electric control diffraction grating and a manufacture method thereof. The reflection type strength tunable electric control diffraction grating comprises a transparent electrooptic ceramic substrate, wherein an incident light anti-reflection film is plated on an incident surface of the transparent electrooptic ceramic substrate, two groups of interphase interdigital electrodes are plated on the other surface of the transparent electrooptic ceramic substrate, which is opposite to the incident surface; and connecting points of the two groups of interphase interdigital electrodes are connected with a positive electrode and a negative electrode of a drive power supply through respective electrode leads. Through regulating voltages of the drive power supply to the interdigital electrodes, energy distribution among diffraction orders of diffraction light can be changed, and strength tuning is realized. The invention has the characteristics ...

Active glass waveguide coupling microannular resonant cavity and active controller thereof

A micro-ring resonant cavity of glass active waveguide couple is prepared by interlinking passive straight waveguide module with active ring waveguide module. The dynamic control device of it is featured as connecting a pumping laser to an input port of wavelength division complexer, using another port as signal light input port and connecting output end of the waveguide division complexer to straight waveguide.

Automatic tuning control F-P fiber optic sensor

The invention comprises a light source and a sensing head. The light source comprises a laser with a temperature control circuit. The laser is connected to a first port of the coupler through optical fiber; the third port of the coupler is connected to the sensing head through optical fiber; the fourth port of the coupler is connected to the initial control unit through second photo detector; the second port of the coupler is connected to the input port of the first photo detector; the output port of the first photo detector is respectively connected to the active control unit and the signal output unit; the output end of the active control unit is connected to the temperature control circuit. Said sensing head comprise a F-P cavity; both sides of the F-P cavity are respectively connected to the silicon membrane and optical fiber; said silicon membrane, F-P cavity and optical fiber is secured by a quartz case; the other end of the optical fiber is connected to said mono-mode fiber.

Metallized optical fibre distributed microheater for temp tuning of optical fibre device

A metallized optical fibre microheater for tuning fibre raster and modulating refractivity of optical fibre features that a metallic heating layer is made on the external surface of raster or opticalfibre and N electrodes are uniformly arranged on said metallic heating layer to divide it into N-1 serial heating units. Each unit has a temp sensing element. Said electrodes and temp sensing elements are connected to control circuit. The temp of heating layer is controlled by computer. Its advantages are high heating efficiency and speed, and different temps in axial direction.

Semiconductor laser and fibre-optical raster mixed and integrated wavelength commutator

A wave-length converter integrating semiconductor laser device and optical fibre raster is a critical element in optical communication system and widely used in light switch, light switching, wave-length routing and wave-length reuse. It contains more than 1 basic converting unit fixed to receptacle in package. Each basic converting unit is composed of 2X2 optical fibre splitter, optical fibre raster controlled laser device consisting of semiconductor laser diode chip and optical raster, optical fibre raster filter, input signal source and input signal monitor receiver. Its advantages are no need of pump source, simple strucutre, high stability, efficiency and sensitivity, and easy operation.

Dying oscillation absorption spectrum detecting and sensing device for all optical fiber cavity

The invention relates to a device for detecting the total optical fiber absorbing spectrum, which comprises an illuminating source, the first driver, an optical cavity, a light-sensitive detector, and a signal collecting and processing system connected together. The device has the merits as follows: the reflectance of the cavity is high, the fineness of the resonant cavity is high, the reflection bandwidth and spectral measuring range are wide, the luminous power couple is efficiency, the measuring sensibility is high and the structure is simple.

Collapsible infrared alarm

A folding infrared alarm comprises an infrared emitting head, an infrared light receiving head and an alarm, and is characterized in that a required anti-theft door frame or window frame is provided with high infrared reflectance or with an infrared high-reflectance slat; the light emitted by the infrared emitting head is reflected by the infrared high-reflectance slat of the door frame or window frame for multiple times to form an invisible light grid barrier and enter the infrared light receiving head; once the infrared light is blocked, the alarm gives an alarm. The invention can accurately give an alarm.

Cylindrical torsion tuning optical fiber grating sensing demodulator

Double bonded high brightness semiconductor laser elements

A double layer mutual piled high brightness semiconductor laser groupware. The characteristics are: it is a piled layer device with P faces of the first and the second semiconductor laser chips oppositely setting and bonded in welding materials. The advantages are high brightness of semiconductor laser; convenient use and low cost.

Two-dimensional laser autocollimator

The invention relates to a two-dimensional laser autocollimator. The autocollimator comprises a generation device of left-hand and right-hand circular polarized light with reticule information on a horizontal optical axis, as well as a first common beam splitter prism, a collimating object lens and a target reflector which are sequentially arranged in the horizontal optical axis direction and theadvance direction of a 'cross' light beam, wherein the generation device generates the left-hand and right-hand circular polarized light with the reticule information to form centrosymmetric 'cross' light beam output; the beam-splitting plane of the first common beam splitter prism is in a 45-degree included angle with the horizontal optical axis; a first lambda/4 wave plate, a first polarizationsplitting prism and a horizontal linear array CCD are sequentially arranged on one side of the first common beam splitter prism; and a vertical linear array CCD is arranged in the reflected light direction ...

Method for measuring timedelay of chirp optical fibre raster

A group delay measuring method of the chirp optical fibre raster is one utilizing the active mode lock effect of the laser device. It is operated by using the chirp optical fibre raster to be measured as an output cavity plant of the laser resonant cavity for outer cavity type active mode lock laser device with the modulating signal source, which sends the selected exciting signal of exciting frequency to excit the laser working matter. Measuring the laser wave length corresponding to the exciting freuqency at the tail end of chirp optical fibre raster and calculating the time for one cycle of the exciting wave of laser wave in the laser resonant cavity can obtain the group delay and draw the curve of the group delay.

Multichannel-to-multichannel non-blocking mechano-optical switch

Microwave millimetric wave subcarrier optical signal generator

Long period fiber-optical grating temperature sensor

An optical fiber grating temperature sensor with long period, comprising optical fiber with long period grating, the signal input terminal of the optical fiber enters the grating with long period through beam splitter with signal output terminal and its end is reflecting unit, the optical fiber between the grating with long period and reflecting unit has its coating cleaned away. Locating the invention in the temperature measuring area, through measuring displacement of wavecrest the temperature change is acquired. The advantages are high temperature even to several hundreds, simple method for demodulation and stability.

Temperature tuning optical fiber optical grating sensing demodulator

A temp tuned optical fibre raster sensing demodulator features that the optical fibre raster is fixed to a miniature resistor heater connected to a modulating power supply. Its advantages are simple structure, low cost, high reliability and wide measurement range. It can be used for optical fibre raster distributed stress and/or temp sensing system.

Optical fiber dissolved oxygen sensing head and preparing method thereof

The sensing head is made of plastic optical fiber-polymethyl methacrylate; said sensing head is U-shaped, biconical, biconical + U-shaped, or filament-shaped; on the sensing head the sensitized material is coated. The preparing method is: using the knife to cut off certain length sleeve of the plastic optical fiber; using the alcohol cotton ball to clean up the optical fiber; using the optical fiber to make an optical sensing head in any shapes; putting the optical sensing head into the sol-gel solution; using the crystal pulling method to coat a layer of sensitized material; drying the sensing head in room temperature.

Strain tuning optical fiber grating sensing demodulator

Fiber grating distributed strain sensor and strain monitoring method thereof

The invention relates to a fiber grating distributed strain sensor and a strain monitoring method thereof, which are characterized in that an erbium-doped fiber amplifier is added into an optical fiber fading cavity to form an active fading cavity, and an optical pulse fading sequence is obtained, so the positioning accuracy of submillimeter-magnitude spatial length measurement can be realized; and a wavelength of a tunable laser is in one-to-one correspondence with positioning data of fiber grating bragg reflection space by taking a linear chirped fiber grating or a uniform fiber grating as a sensing device, and the corresponding local strain capacity is demodulated by positioning the variable quantity of a local bragg reflection wavelength to realize distributed strain sensing. In the fiber grating distributed strain sensor, the spatial resolution ratio is improved to a submillimeter magnitude by a direct time domain measurement method, and the fiber grating distributed strain sensor ...

Metallic material corrosion optical fiber grating sensing head

The invention discloses a fiber grating sensing head of the corrosion of metal materials and is characterized in that the fiber grating sensing head comprises a cylindrical shell, a plunger ring fixes a round plate of the metal materials to be detected for the corrosion at one end of the cylindrical shell, thus forming a built-in round plate structure; inner screw threads are arranged at the other end of the cylindrical shell and are used for embedding a matched supporting plate with outer screw threads, a through hole is arranged in the circle center of the supporting plate, a fiber grating fixing holder is fixed outside the supporting plate and is coaxial with the cylindrical shell, a pressure spring is fixed between the supporting plate and the round plate, a kicker that is fixedly connected with the pressure spring presses on the circle center of the round plate under the thrust force of the pressure spring, one end of a sensing fiber grating runs through the through hole of the supporting ...

Detector for fluid absorptive ray spectral intensity

A detection device equipped with an absorption cell containing fluid is featured as connecting a light source to the absorption cell being connected with input end of optical fibre coupler, connecting positive input end of coupler to fibre optice grating filter being connected with photoelectric detector, connecting the detector to microprocessor through signal processing unit and using fibre optics grating driver to drive the filter to carry out periodical scanning movement.

Fibre-optical raster sensing device for monitoring metal rust

Full optical fibre Fizeau interference confocal measuring apparatus

Multi-emitting light source automatic tracking radio laser communication terminal equipment

The automatically-tracking multiple-emitting light source radio laser communication terminal includes emitting subsystem and receiving subsystem. It features that the emitting subsystem has communication signal emitting laser array, emitting collimating lens array, beacon laser and beacon laser emitting collimating lens; and the receiving subsystem has receiving lens, receiving detector, bicolorplane mirror, bandpass communication laser filter, bandpass beacon laser filter, tracking receiving detector, beacon laser preamplifier and processing circuit, and single-board computer to drive the motor via the driver for regulating the elevation and azimuth of the terminal. The integral equipment can emit, receive and track automatically, may be connected with communication system, and has the features of stable operation, high emitted power and high communication quality.

Modulation-free frequency stabilizer of external cavity semiconductor laser

A modulation-free frequency stabilizer of an external cavity semiconductor laser consists of a single frequency narrow-linewidth external-cavity semiconductor laser, a Faraday isolator, a first half-wave plate, a polarization beam splitter, a Sagnac ring, a differential detection circuit consisting of two photoelectric diode detectors, a subtraction circuit, a proportional-integral-differential processing circuit and a switch. The modulation-free frequency stabilizer has the advantages of simple structure, good frequency stabilization effect, low cost and the like.

Modulation-free frequency stabilizer of external cavity semiconductor laser

A modulation-free frequency stabilizer of an external cavity semiconductor laser consists of a single frequency narrow-linewidth external-cavity semiconductor laser, a Faraday isolator, a first half-wave plate, a polarization beam splitter, a Sagnac ring, a differential detection circuit consisting of two photoelectric diode detectors, a subtraction circuit, a proportional-integral-differential processing circuit and a switch. The modulation-free frequency stabilizer has the advantages of simple structure, good frequency stabilization effect, low cost and the like.

Fibre-optical sensing device for monitoring metal rust

Regulatable optical-fibre delay line with narrow line and wide seleted spectrum

A narrow-line frequency-selecting regulatable optical fibre delay line is composed of optical fibre circulator with 3 ports, at least two delaying optical fibre segments, and at least two tunable optical fibre rasters. At least one of said raster has the distributed microheater. Its advantages are full fibre device, regulatable delay, and high precision.

Magnetic attracted plane reflective mirror optical valves

Semiconductor laser measurer of shock

A semiconductor laser shock measurer is composed of shock light source to generate modulating shock light beam, measuring light source to generate measuring light beam with constant intensity, optical-fibre wave synthesizer, optical fibre cluster, photoelectric detector, optical fibre multiplexer and optical fibre probe which aligns to the spcimen to be measured by its end face and has sine phasemodulation. The shock light beam can make specimen to vibrate. The measuring light beam reflected from the surface of specimen and the light beam from end face of optical fibre probe take part in interference to measure vibration frequency and amplitude at same time. Its advantages are multiple function non-contact type, small size, and high measuring accuracy and stability.

Millimeter wave subcarrier light pulse signal generator based on cascade all-pass filter

The invention relates to a millimeter wave subcarrier light pulse signal generator based on a cascade all-pass filter, which consists of an ultrashort pulse fiber laser with collimation coupling output, the cascade all-pass filter, a fiber coupler and a transmission fiber connected in turn. The all-pass filter is a G-T filter or an optical waveguide annular resonant cavity. The millimeter wave subcarrier light pulse signal generator has the characteristics of low cost, simple design and processing and high energy conversion efficiency.

Fibre-optical raster sensing device for monitoring metal rust

The invention relates to a device which is used in the metal structure material rusting away the condition monitor the metal to rust away the monitor optical fiber diffraction grating transmitter, constitutes including the first support abutment, through one to skids in the first support abutment one side along the week skids the joint of casing second support abutment, in should skid on the drive pipe with to wait the monitor metal material to circle the system as soon as to have the compression remainder the spring and the agglutination skid on the drive pipe in the technique, in should skid the drive pipe central shaft position to be gummy as soon as receives the first optical fiber diffraction grating which the spring resiliency stretches, a this first optical fiber diffraction grating light end fixes in on the first support abutment which states and stretches out a free electricity, This optical fiber free electricity connects the first fiberoptic connector; In states the optical fiber ...

Laminated type electro-optic space phase modulator

The invention provides a lamination type electrooptical space phase modulator which is characterized in that the structure thereof is formed by a plurality of blocks of electrooptical material panels with certain length L, thickness H and width K and coated with metal electrodes on the upper surface and the lower surface (L multipled by K) along the thickness direction in a laminating manner; the electrodes on the layer of odd number are connected into one electrode by lead wires; the electrodes on the layer of even number are connected into another electrode by lead wires; and the electrodes on the layer of even number can be respectively connected with a driver with cascade voltage according to need. The invention reduces the working voltage of the phase modulator, decreases the power consumption of optical elements, raises the effective clear aperture ratio, has various structure styles, and can realize the conversion of multiple-space phase modulation and the wave surface of the optical ...

Optical beam scanning laser

The invention relates to an optical beam scanning laser, which comprises a full-reflective back cavity mirror, a laser medium and a laser output device arranged on the same optical axis in turn, and is characterized in that a spatial light phase modulator with optical beam deflection function is also arranged in a laser cavity between the laser medium and the laser output device. The laser has the characteristics that the laser output device has multiform structures, the deflection of the output optical beam can be controlled, the deflection of the optical beam is large, and the output power is high.

Polarization unrelated high speed photo switch

A high speed optical switch into relating polarization is disclosed whose characteristics is its structure: the driving device includes by circular mirror comprising of the third terminal port and the forth terminal port on one side of a coupler connecting together and a controlling device being put into the circular mirror ; the first terminal port of the is connecting to the second terminal port of three terminal ports circulator whose first terminal port is input terminal and the third terminal port is the first output terminal of the switch, the second terminal port is the second output terminal; the coupler circulator and circular mirror are all fixed on one. The advantages are rapid response speed, unconcerned to polarization and broad band response, simple structure, reliable and stable operation.

Bandwidth-adjustable bevelled optical fiber raster and its manufacturing method

Magnetic attracted plane reflective mirror optical valves

An optic switch with magnetic absorption for planar reflecting mirror achieves switching optic circuit through translation of the planar reflecting mirror. Adopting the positioning technology with high accuracy for magnetic absorption of planar reflecting mirror, a magnetic acting force from a permanent magnetic field is applied in the direction perpendicular to the reflecting surface of the planar reflecting mirror so as to absorb the planar reflecting mirror on a fixed reference plane to ensure the reflecting surface of the planar reflecting mirror to be always on a same plane whether during a motional process or a standstill state; the planar reflecting mirror is inserted into or drawn out from the optic circuit to achieve switching the optic circuit using electro-magnetic driving in push-pull form, forming 1X2 or 2X2 mechanical optic switch.

Fiber grating distributed strain sensor and strain monitoring method thereof

The invention relates to a fiber grating distributed strain sensor and a strain monitoring method thereof, which are characterized in that an erbium-doped fiber amplifier is added into an optical fiber fading cavity to form an active fading cavity, and an optical pulse fading sequence is obtained, so the positioning accuracy of submillimeter-magnitude spatial length measurement can be realized; and a wavelength of a tunable laser is in one-to-one correspondence with positioning data of fiber grating bragg reflection space by taking a linear chirped fiber grating or a uniform fiber grating as a sensing device, and the corresponding local strain capacity is demodulated by positioning the variable quantity of a local bragg reflection wavelength to realize distributed strain sensing. In the fiber grating distributed strain sensor, the spatial resolution ratio is improved to a submillimeter magnitude by a direct time domain measurement method, and the fiber grating distributed strain sensor ...

Distributed Bragg reflection type single frequency optical fiber laser based on phase shifting optical fiber grating

The present invention discloses distributed prague reflection-type single frequency optical fiber laser based on phase displacement optical fiber grating, characterized in that filtering frequency selection is realized by utilizing narrowband filter effect of reflection peak of equivalent Fabry-Perot cavity that composed by the phase displacement optical fiber grating and optical fiber grating. The whole device comprises a pumping source, a wavelength division multiplexer, optical fiber grating, phase displacement optical fiber grating, high concentration adulterate optical fiber and optical fiber grating, wherein the optical fiber grating, the phase displacement optical fiber grating, the high concentration adulterate optical fiber and the optical fiber grating constitutes the laser resonant cavity. The present invention is capable of outputting high power single frequency laser.

Optical fiber dissolved oxygen sensing head and preparing method thereof

The sensing head is made of plastic optical fiber-polymethyl methacrylate; said sensing head is U-shaped, biconical, biconical + U-shaped, or filament-shaped; on the sensing head the sensitized material is coated. The preparing method is: using the knife to cut off certain length sleeve of the plastic optical fiber; using the alcohol cotton ball to clean up the optical fiber; using the optical fiber to make an optical sensing head in any shapes; putting the optical sensing head into the sol-gel solution; using the crystal pulling method to coat a layer of sensitized material; drying the sensing head in room temperature.

Method for measuring timedelay of chirp optical fiber raster

Multi-beam wave-synthesis ware-partitioning apparatus for cladded pumping optical fiber amplifier and laser

The present invention relates to a multi-beam composite wave wave-separator for cladded pumping optic fibre amplifier and laser, and its structure is characterized by that the signal light transmitted by signal light source is passed through monomode fibre and coupling element, and fed into core of double-cladded optic fibre, and the optic beam transmitted by pumping light source is passed through the coupling element and fed into the internal cladded layer of double-cladded optic fibre. Its key coupling element is the composite wave of two-colour plane mirror and polarization diaphragm or combination of self-focusing lens and rectangular prism or combination of self-focusing lens, rectangular prism and polarization diaphragm or combination of self-focusing lens and double-face two-colourdiaphragm prism or side grating coupling or multi-section optic fibre grating coupling.

用于光纤器件温度调谐的金属化光纤分布式微加热器

... 一种用于光纤器件温度调谐的金属化光纤分布式微加热器，主要适用于光纤光栅的调谐和光纤折射率的调制。含有在裸光纤或光纤光栅的外表面上覆盖的金属加热层。金属加热层上均匀分布有N≥2个电极，将金属加热层分成N≥1个串联的加热单元。每个加热单元上置有测温元件。每根电极和每个测温元件都连接到控制电路上。控制电路有两种结构供选择。由计算机通过控制电路控制金属加热层的温度变化，从而达到调谐或调制的目的。具有加热效率高，加热速度快，能够获得沿光纤轴向温度分布不同的要求，对于动态色散补偿、高阶色散补偿、特殊光谱滤波器等也有重要的应用意义。 ...

Optical phase control array light beam scanner based on PLZT

This invention relates to an optical phased-array beam scanner based on lead titanate doped with La and Zr including a slice of lead titanate doped with La and Zr characterizing in setting a conductive lower electrode on the lower surface, which is connected with the negative of a voltage drive or connected to the earth, forming a phasing array electrode composed of multiple bar electrodes on the upper surface, in which, adjacent bar electrodes in it are the same in width and interval and the lengths of them are decreased or increased arithmetically orderly, after being connected by lead, the electrodes are connected with the positive of the voltage drive and the control pole of the drive is connected with a computer.

Bandwidth-adjustable bevelled optical fiber raster and its manufacturing method

Making an optical fiber grating with bevel edge on a section of optical fiber with varied external diameter installed on the tuning mechanism constitutes the invented optical fiber grating. The manufacturing procedure includes following steps. (1) The optical fiber grating with bevel edge is prepared. (2) According to the designed requirement, the external diameter of the optical fiber grating iscorroded. (3) The tuning mechanism is installed. The advantages of the invention are: large bevel edge bandwidth of the reflectance spectrum, good linearity, dynamic tunable bandwidth and large tunable range, simple manufacturing procedure, high yield and good stability.

Strain transducer based on porous microstructure optical fibre

The invention provides a strain sensor based on porous micro-structure optical fibre, which is characterized in that the strain sensor is composed of a light source, a lead-in single-mode optical fibre, a porous micro-structure optical fibre, a lead-out single-mode optical fibre and a photoelectric detector, which are connected in series and sequence. The porous micro-structure optical fibre is a pure silica core which is enwound by a ring of sector air holes; the edges of the core present ratchet wheel shaped structure. The strain sensor can measure tension strain, flexibility strain and torsion strain, and has the advantages of high sensitiveness, high temperature resistance and electromagnetic radiation resistance.

Semiconductor laser and optical fiber raster mixed and integrated wavelength commutator

Semiconductor laser measurer of shock

Device for stabling semiconductor laser operation wavelength

Device and method for detecting dynamic properties of two-dimensional directional mirror

The invention relates to a device and method for detecting the dynamic properties of a two-dimensional directional mirror. The device comprises a dynamic photoelectric autocollimator, a controller of the dynamic photoelectric autocollimator, a hollow rotary platform, a controller of the hollow rotary platform, a rotary target, an adjustment platform, a data acquiring and processing system and a computer measurement and control system. Under the guidance of the computer measurement and control system, a target simulation reflector on the rotary target is driven by the rotary platform to simulate an optical target in movement, the dynamic photoelectric autocollimator provides the rapid and high-precision angle miss distance for the two-dimensional directional mirror, the data acquiring and processing system feeds back and controls the two-dimensional directional mirror to track the target simulation movement in real time, and the computer measurement and control system processes the measurement ...

Fibre-optical sensing device for monitoring metal rust

A monitor metal rusts away the optical fiber transmitter, its constitution includes: The detecting head is in waits on the monitor metal material by the first optical fiber to twine the N circle constitution; Reference is in one with treats on the monitor metal structure material configuration and the radius same anti-corrosive material by the second optical fiber twines the N circle constitution; States a detecting head first optical fiber end and refers to the head a second optical fiber end to tie the ratio after the minute is 1: 1 first optical fiber coupler coupling and forms the first port and the second port, states the first optical fiber and the second optical fiber another end ties the ratio after the minute is 1: 1 second optical fiber coupler coupling and forms the third port and the fourth port. This invention has the structure simply, the manufacture is easy, may obtain the high sensitivity survey; May use certain optical fiber paths of rays to constitute the multi- viewpoints ...

All optic fiber wavelength selection type polarization beam splitter

The structure of polarization beam splitter is as follows. The fiber core of the birefraction optical fiber contains the optical fiber grating with long period. The fiber core of another optical fiber contains the matched optical fiber grating with long period. The fiber cladding area hugged closely. Two optical fiber gratings are at certain distance. With being straightened up, the two optical fibers are fixed on the same stripe shape plate, which is encapsulated in the circular pipe. Comparing with the common crystal polarization beam splitter, the invented splitter possesses the advantagesof small insertion loss, small size, good wavelength selectivity, high isolation, small backward reflection and easy to be produced.

实时测量厚度与折射率的半导体激光干涉测量装置

... 一种实时测量厚度与折射率的半导体激光干涉测量装置，包括线性调制光源，由准直透镜，六个分束器，两块反射镜以及置于样品架上的被测物体构成多光束干涉仪。由四个探测器分别通过四个位相提取器和四个微分器连接到带显示面板的数据处理器上的四个端口构成信号检测和数据处理部分。具有无需扫描干涉臂，能够实时测量物体的厚度和折射率。测量精度和灵敏度高的特点。 ...

Semiconductor laser interferometric device for real-time measurement of thickness and refractivity

A semiconductor laser interferometric device for measuring thickness and refractivity at real time is composed of linearly modulated light source, multi-beam interometer consisting of 6 splitters, two reflectors and object to be measured, and signal detecting and data processing unit consisting of 4 sensors, 4 position-phase extractors, 4 differentiators and data processor with display panel. Itsadvantages are high accuracy and sensitivity.