98 results about "Pigtail" patented technology

A loop pigtail compensation method for a fiber-optic gyroscope, and a fiber length compensator. The fiber length compensator is fixed on a loop pigtail of the fiber-optic gyroscope, and the fiber length compensator includes a peripheral fiber loop and an expansion-and-contraction shaft core capable of realizing deformation of expanding and contracting; and upon detecting that there is a drift in an output of the fiber-optic gyroscope, a length of the peripheral fiber loop of the fiber length compensator is changed by adjusting a coefficient of linear expansion of the expansion-and-contraction shaft core of the fiber length compensator, so that the compensation for the loop pigtail of the fiber-optic gyroscope is realized, and the problem of low accuracy of online adjustment of the pigtail of the fiber-optic gyroscope is solved.

The invention belongs to the field of quantum precision sensing and measurement, and provides an optical fiber collimator applied to an atom magnetometer and an assembly method of the optical fiber collimator. The optical fiber collimator applied to the atom magnetometer comprises a polarization-maintaining optical fiber pigtail, a lens, a laser homogenizing wave plate, a circular polarization polarizer, a diaphragm and a sleeve, the lens is arranged on the downstream of the polarization-maintaining optical fiber pigtail, the lens is an aspheric lens, the laser homogenizing wave plate is provided with a homogenizing area, the polarization axis of the circular polarization polarizer coincides with the polarization axis of emergent light of the lens, and the diaphragm is arranged in the sleeve. The light source is used for generating circularly polarized light, the diaphragm is used for limiting the shape of an emergent light spot, and the sleeve is used for installing the polarization-maintaining optical fiber pigtail, the lens, the laser homogenizing wave plate, the circular polarization polarizer and the diaphragm. The atomic polarization uniformity can be effectively improved, the response signal of the atom magnetometer is improved, the signal-to-noise ratio of the quantum sensor system is improved, and the quantum sensor system is suitable for being used in a high-precision measurement scene.

This invention discloses a 9-cavity mode-locked fiber laser with adjustable parameters based on a liquid crystal phase delay device, belonging to the field of mode-locked laser technology. It includes, along the optical path, a mirror, a polarizing beam splitter prism, a liquid crystal phase delay adjustable waveplate, a Faraday rotator, a liquid crystal phase delay adjustable waveplate, and a polarizing beam splitter prism. A fiber optic loop is provided on one side of the polarizing beam splitter prism, comprising, in sequence, a fiber collimator, a gain fiber, a wavelength division multiplexing-splitter mixer, and a fiber collimator prism. The slow axis of the fiber collimator prism's pigtail is aligned horizontally with the polarizing beam splitter prism prism 2; the slow axis of the fiber collimator prism 2's pigtail is aligned vertically with the polarizing beam splitter prism prism 2. A pump semiconductor laser is connected to the pump input of the wavelength division multiplexing-splitter mixer, and an FCAPC jumper is connected to the signal output of the wavelength division multiplexing-splitter mixer. This enables continuous and rapid adjustment of the laser parameters.

The invention discloses a light source module and a projection display device. The light source module comprises a laser light source; the coupling lens is arranged on an emergent light path of the laser light source, and the light incident side and / or the light emergent side of the coupling lens are / is provided with an aperture diaphragm; and the tail fiber is arranged on an emergent light path of the coupling lens, light emitted by the laser light source is coupled into the tail fiber through the coupling lens, and by setting the type of the tail fiber and designing an optical fiber coupling end face, echoes and stray light generated at the optical fiber coupling end face are reduced, the influence of the echoes and the stray light on output of the laser is weakened and avoided, and the imaging quality is improved.

The corn fruit biological information detection device comprises a bottom plate, a waste liquid collection box and a U-shaped detection seat, a detection cavity is formed in an inner cavity of the U-shaped detection seat, a detection optical fiber is arranged on the inner wall of the detection cavity, and a light source, a spectrograph, a single-mode tail fiber and a multi-mode optical fiber are arranged at the two ends of the detection optical fiber respectively. Side frames are installed at the top ends of the outer walls of the two sides of the U-shaped detection base, a top beam is installed between the adjacent side frames, a controller and a flushing mechanism are arranged on the top beam, the flushing mechanism comprises a U-shaped walking frame, a spray head is installed at the bottom of the U-shaped walking frame, and two sets of tooth-shaped plugging plates are arranged at the bottom of the detection cavity; through the action of the light source, the single-mode tail fiber, the spectrograph, the multimode optical fiber and the detection optical fiber, rapid detection of corn fruit biological information is achieved, rapid washing of the detection cavity after detection is completed is achieved, the situation that residual corn fruit extracting solution affects the accuracy of next-time biological information detection is avoided, and the detection efficiency is improved.

A telecommunications rack system includes a first element defining splice locations and a second element defining adapters for receiving connectorized cabling, wherein the first and second elements are positioned on the same rack. A first end of a fiber optic pigtail is spliced at and extends from the splice locations of the first element. A second end is connectorized with a fiber optic connector that is coupled to an adapter of the second element. The pigtail extends between the first and second elements. A cable manager is removably mounted at the side of at least one of the first and second elements. The cable manager defines a U-shaped passage including ends that open toward one end of the elements and a closed end opposite the open ends. The U-shaped passage defines cable pass-throughs adjacent the closed end for transitioning cables from inside the U-shaped passage to an exterior thereof, wherein the connectorized pigtail is passed at least through a portion of the U-shaped passage and out the cable pass-through going from the first element to the second element.

1. The name of the design product: doll (Huihui). 2. The use of the design product: for dolls, ornaments, hand-made, etc. for entertainment. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: perspective drawing.

This invention relates to fiber optic ring assemblies, specifically to a fiber optic ring assembly and a sealing process method to improve its long-term stability. This addresses the technical problems of existing fiber optic ring assemblies, such as the inability to guarantee the accuracy performance of the fiber optic ring when exposed to air, poor sealing performance at the small holes in the fiber optic ring shell, and slippage of the fiber optic ring and pigtails from the fiber optic ring shell due to weak adhesive. The invention includes a fiber optic ring shell and a fiber optic ring. The fiber optic ring shell includes a fiber optic ring frame and a cover plate, which are sealed together. The fiber optic ring is installed within the cavity formed by the fiber optic ring frame and the cover plate. The invention also includes a flexible absorbent material covering the fiber optic ring. The flexible absorbent material fills the space within the cavity of the fiber optic ring shell, excluding the space occupied by the fiber optic ring. A channel is provided on the fiber optic ring shell connecting the cavity to the outside. At least one pigtail of the fiber optic ring extends from this channel. The channel is sealed.

This invention discloses a solid-core and hollow-core fiber conversion device, comprising: a dual-spherical lens, a glass tube, a single-mode solid-core fiber pigtail, and a hollow-core fiber pigtail; the dual-spherical lens includes a first end spherical surface and a second end spherical surface, wherein the curvature of the first end spherical surface is less than the curvature of the second end spherical surface; the first end spherical surface of the dual-spherical lens is close to the single-mode solid-core fiber pigtail, and the second end spherical surface of the dual-spherical lens is close to the hollow-core fiber pigtail. Using this structure, the size of the light spot converged by the first end spherical surface is the same as the size of the light spot emitted by the hollow-core fiber pigtail, enabling the conversion of light between hollow-core and solid-core fibers. It also solves the problems of ultra-high loss and extremely low return loss caused by fusion splicing of solid-core and hollow-core fibers, and features a simple and compact structure, low cost, and excellent performance.

The utility model relates to the technical field of gas cylinder water pressure detection, in particular to a pull-out type tail fiber storage device which comprises a box body, a first sliding groove is formed in the box body, a sliding block is installed in the first sliding groove, a drawer is installed on the other side of the sliding block, a feeding mechanism is installed in the drawer, and optical fibers are installed on the surface of a consumable frame in the feeding mechanism. According to the pull-out type tail fiber storage device provided by the utility model, the optical fibers are wound on the consumable frame through the feeding mechanism, so that the technical problems that in the prior art, the optical fibers and optical fiber devices are distributed disorderly, and the internal space of the whole machine is wasted are solved; the utilization rate of the internal space of the optical fiber equipment is improved, the size of the optical fiber equipment is reduced, the optical fiber and an optical fiber device are effectively protected, the optical fiber penetrates through the second through groove to reach the optical fiber hole through the auxiliary mechanism, and the situation that use is affected due to the too small bending radius in the optical fiber drawing process is avoided.

An optical fiber pigtail convenient and fast to identify comprises an optical fiber cable and a sheath, the outer wall of the optical fiber cable is fixedly connected with the inner wall of the sheath, the top of the sheath is connected with a control structure, the front face of the optical fiber cable is fixedly connected with an optical fiber plug, and the outer wall of the optical fiber plug is connected with an opening and closing structure. The upper side and the lower side of the opening and closing structure are connected with curved blocks correspondingly. A user checks the material and the structure inside the optical fiber plug so as to judge the type of the optical fiber pigtail, then the inner wall of a protection pad is attached to the outer wall of the optical fiber plug, meanwhile, the outer wall of the cross rod is connected with the round opening in the right side of the first shell in an inserted mode, and the optical fiber pigtail is inserted into the first shell. The optical fiber plug can be disassembled and assembled without a tool, model identification is facilitated, the use cost of the optical fiber pigtail is reduced, and operation and use of the optical fiber pigtail are facilitated.

The invention discloses a middle and far infrared low-noise ultra-wideband spectrum generating device, which comprises a femtosecond fiber laser, a single-mode ZBLAN fiber, a single-mode InF3 fiber, a first mode field adapter, a hollow-core anti-resonance fiber, a second mode field adapter, a full-positive dispersion chalcogenide fiber and an air chamber which are sequentially arranged along a laser path, and is characterized in that the femtosecond fiber laser is used for outputting laser pulses; the wavelength of laser pulses is larger than or equal to 2.1 micrometers, the pulse width is smaller than or equal to 30 fs, and the average power is larger than or equal to 2 W. A tail fiber of the femtosecond fiber laser, the single-mode ZBLAN fiber and the single-mode InF3 fiber are sequentially welded, and the single-mode InF3 fiber is in mode field adaptive connection with the hollow-core anti-resonance fiber through a first mode field adapter. The hollow-core anti-resonance optical fiber is in mode field adaptive connection with the full-positive-dispersion chalcogenide optical fiber through a second mode field adapter, the single-mode ZBLAN optical fiber and the single-mode InF3 optical fiber are packaged in a gas chamber, and the gas chamber is filled with protective gas. The device disclosed by the invention realizes all-fiber, and can generate an ultra-wideband spectrum which covers a wave band of 3-8 microns and has a low-noise characteristic.

The utility model discloses a surface array optical fiber collimator, is constituted by mould pressing lens array, a plurality of pigtail, a plurality of connecting pipe or ridge hole plate, one side of lens array is array convex surface, the other side is a plurality of ridge inclined plane, one side end surface of connecting pipe or ridge hole plate and lens array gluing, the other side end surface and pigtail gluing, since every optical fiber collimator is through the precise light adjustment between pigtail relative to plano-convex lens, and is fixed after the axial transition through connecting pipe or ridge hole plate, can guarantee the mechanical positioning accuracy index of every collimator and the optical performance index in the whole surface array optical fiber collimator, and the quality can be guaranteed, in addition, the utility model has compact structure and low material cost, and easy to assemble, the yield is high, is suitable for building large array.

The application relates to an optical device without an isolator, comprising a transmitting end, a polarizer, a first filter, a receiving end and a pigtail, the transmitting end is arranged obliquely relative to the polarizer, the first filter is arranged obliquely between the polarizer and the pigtail, and the receiving end is arranged on the reflection light path of the first filter; linearly polarized light emitted by the transmitting end is coupled to the pigtail after being transmitted by the polarizer and the first filter in sequence; and a received optical signal recycled from the pigtail enters the receiving end after being reflected by the first filter. The application effectively suppresses the interference of reflected light. The traditional scheme needs an optical isolator, and the application omits the optical isolator through specific optical path structure design, reduces the device manufacturing cost, and meets the application requirements of consumer-grade optical communication products.

The present application relates to a kind of alignment methods of the oblique angle of the oblique end face of pigtail, belong to optical fiber detection technical field, comprising the following steps: step 1) using ANSYS software adopts stereoscopic scanning method scanning and gathers the model data of pigtail and rectangular capillary;Step 2) the oblique angle that the end of pigtail needs to be ground is set in advance, the end of pigtail is simulated to be ground, and the deformation of pigtail grinding is analyzed;Step 3) using vector angle method analyzes the oblique angle of the end of pigtail after grinding, detects the oblique angle that the end of pigtail needs to be ground and the oblique angle of the end of pigtail after grinding;Step 4) the oblique angle of the end of pigtail after grinding is processed;The beneficial effects of the present application: by comparing the oblique angle that the end of pigtail needs to be ground and the oblique angle of the end of pigtail after grinding, the deviation between the oblique angle of the oblique end face of the pigtail after correction or detection grinding and the oblique angle of the oblique end face of the pigtail actually needed is reduced.

The invention discloses an optical cable tail line stress releasing device, and solves the technical problem that in the prior art, an optical cable spirally leads down along a tower to generate axial torsion, and consequently stress is increased. The optical cable tail wire stress releasing device comprises a first rotating body, a second rotating body and a rotating seat, the first rotating body is fixedly arranged, the second rotating body is fixedly connected with an optical cable tail wire, the rotating seat is axially connected between the first rotating body and the second rotating body, and a limiting cavity is formed in the rotating seat; a stand column is arranged at one end of at least one of the first rotating body and the second rotating body in the axial direction in a protruding mode, a limiting sleeve is arranged at the free end of the stand column and comprises a limiting part, and the limiting part is rotationally arranged in the limiting cavity in a limited axial movement mode. At least one of the first rotating body and the second rotating body is rotationally connected with the rotating seat in a limited axial movement mode, and the second rotating body rotates relative to the first rotating body to release stress of the optical cable tail wire.

The present application relates to the technical field of optical communication modules. Provided are a pigtail mounting assembly and an optical device. The pigtail mounting assembly comprises an optical fiber and an optical-fiber fixing member, wherein the optical fiber has a bare fiber and a protective layer that covers the bare fiber, the bare fiber comprising a connection portion exposed from the protective layer and an extension portion covered by the protective layer; and the optical-fiber fixing member comprises a first end face and a second end face, which are opposite each other; a first through hole communicating the first end face with the second end face is provided in the optical-fiber fixing member; the connection portion passes through the first through hole, and is at least partially located in the first through hole; and the extension portion is located outside the first through hole, and is closer to the second end face than to the first end face. A sealing layer is provided between the connection portion and the hole wall of the first through hole. By means of providing the sealing layer, the sealing performance between the bare fiber and the optical-fiber fixing member can be improved, thereby meeting the liquid cooling requirement of the optical device.

The invention relates to an automatic test platform of a tail fiber type optical device, which comprises at least one automatic test device, and the automatic test device comprises a base which is provided with a first channel and a second channel which are arranged at an interval; the feeding mechanism penetrates through the first channel and is used for feeding the tail fiber type optical device; the testing mechanism is arranged on the machine base and is close to the feeding mechanism. The testing mechanism is provided with a testing station; the mechanical arm is located on one side of the testing mechanism, corresponds to the feeding mechanism and is used for clamping the tail fiber type optical device. The discharging mechanism penetrates through the second channel, is close to the mechanical arm and is used for conveying the tested tail fiber type optical device. Wherein the feeding mechanism feeds the tail fiber type optical device, the manipulator moves the tail fiber type optical device to a test station, the test mechanism automatically tests the tail fiber type optical device, and the manipulator transfers the tested tail fiber type optical device to the discharging mechanism after the test, so that the full-process automation of the tail fiber type optical device from input to test to output is realized; the automation degree and the testing efficiency are improved.

1. Name of the designed product: Comb (small tail beauty hair air cushion comb). 2. Use of the designed product: For combing hair. 3. Design points of the designed product: Combination of shape and pattern. 4. Picture or photo best indicating the design points: Front view.

The utility model discloses an anti-bending reinforced tail fiber, which comprises a connector, one end of the connector is connected with a plug, the other end of the connector is connected with an optical fiber, the joint of the optical fiber and the connector is provided with a sheath, one end of the sheath is connected with a fixed head, the fixed head is in threaded connection with the connector, a plurality of V-shaped plates are arranged in the sheath, and a plurality of arc-shaped sleeves are arranged in the V-shaped plates. A plurality of V-shaped plates are arranged in the protective sleeve, a plurality of arc-shaped sleeves are arranged in the protective sleeve, reinforcing transverse plates and reinforcing vertical plates are connected in the arc-shaped sleeves, the reinforcing transverse plates and the reinforcing vertical plates are connected and arranged in a cross shape, and the multiple V-shaped plates, the arc-shaped sleeves, the reinforcing transverse plates and the reinforcing vertical plates arranged in the protective sleeve form a stable supporting structure. When the connecting part of the connector and the optical fiber is extruded, pulled or bent by external force, the structure in the sheath can effectively disperse stress, damage to the connecting part of the optical fiber and the connector caused by excessive bending is prevented, the risk that the optical fiber is broken or signal transmission is interfered is greatly reduced, and stable transmission of optical signals is guaranteed.

A fiber optic pigtail assembly that includes a plurality of optical fibers and at least one optical connector. The optical fibers each have a first end opposite a second end. The plurality of optical fibers are ribbonized together from the first end of each of the plurality of optical fibers partway toward the second end of each of the plurality of optical fibers and form a ribbonized end portion. The at least one optical connector is connected to the second end of each of the plurality of optical fibers. A loose portion of the plurality of optical fibers is positioned between the at least one optical connector and the ribbonized end portion

This utility model belongs to the technical field of fiber optic amplifier equipment, specifically relating to a C-band few-mode erbium-doped fiber amplifier, comprising: an input-end few-mode pigtail, an input-end few-mode to single-mode mode field adapter, an input-end single-mode isolator, a single-mode wavelength division multiplexer, a single-mode pump, a single-mode erbium-doped fiber, an output-end single-mode isolator, an output-end single-mode to few-mode mode field adapter, and an output-end few-mode pigtail; wherein, the input-end few-mode pigtail, the input-end few-mode to single-mode mode field adapter, the input-end single-mode isolator, the single-mode wavelength division multiplexer, the single-mode erbium-doped fiber, the output-end single-mode isolator, the output-end single-mode to few-mode mode field adapter, and the output-end few-mode pigtail are sequentially connected by fiber optic fusion splicing; the single-mode pump and the single-mode wavelength division multiplexer are connected by fiber optic fusion splicing.

The utility model belongs to the technical field of sonar, and particularly relates to a pigtail tube machining and bending machine for a reformer. Comprising a rack; the driving mechanism is mounted on the rack; the pipe bending mold is detachably locked at the output end of the driving mechanism; the pipe bending die is of a curved surface wheel structure with an arc-shaped groove. The number of the guide positioning wheels is two, and the guide positioning wheels are linearly, detachably and rotatably mounted on the rack; and the arc-shaped positioning blocks and the arc-shaped grooves in the pipe bending mold are symmetrically arranged in a buckled mode so as to form a channel allowing the pigtail pipe to penetrate through in a matched mode, and clamping force is applied to the pigtail pipe. The pipe bending machine adopts the motor to drive pipe bending, and is time-saving and labor-saving compared with manual pipe bending, so that the working efficiency is improved, and the labor intensity of workers is reduced.

This invention discloses a fiber laser output head including pump stripping and mode filtering functions, comprising a metal base, a metal top cover, a pigtail, an output cap, and a thermally conductive substrate. The metal base and metal top cover form a space for placing the pigtail and the output cap. The pigtail passes through a pigtail hole and is fused to the output cap. A UV optical adhesive is applied to the coating layer of the pigtail near the pigtail hole. On the pigtail, a bare fiber etched area and a bare fiber adhesive application area are sequentially arranged towards the output cap. A thermally conductive substrate is provided below the bare fiber adhesive application area. High-refractive-index UV optical adhesive is filled between the bare fiber adhesive application area and the thermally conductive substrate, and the UV optical adhesive is used to fix the thin cylindrical side of the output cap. This invention also provides a method for manufacturing the aforementioned fiber laser output head including pump stripping and mode filtering functions. This invention can shorten the pigtail length between the CPS and the output head, reduce the laser volume, and make the optical axes of the pigtail and the output head lie in the same horizontal plane.

The application discloses a three-port reflective circulator and a preparation method thereof. The three-port reflective circulator comprises a three-fiber pigtail, a ring-shaped core and a plurality of glass tubes. The tail fiber end face of the three-fiber pigtail is subjected to a hot expansion core treatment. The ring-shaped core comprises a polarization beam splitting assembly, a rotary optical assembly and a refractive assembly. The polarization beam splitting assembly comprises a displacement crystal. The rotary optical assembly comprises a half-wave plate group, a rotary optical unit, a half-wave plate and a compensating plate. The refractive assembly comprises a collimating lens, a Wollaston prism and a mirror. The three-fiber pigtail and the ring-shaped core are sleeved by the plurality of glass tubes. In the application, the light emitted by the three-fiber pigtail passes through the polarization beam splitting assembly, the rotary optical assembly and the refractive assembly in sequence, is reflected by the mirror, and returns to the three-fiber pigtail by passing through the refractive assembly, the rotary optical assembly and the polarization beam splitting assembly in sequence. The three-port reflective circulator in the application has a more compact structure and a smaller size, and can be widely applied to the technical field of optical devices.

This invention relates to a track-mounted optical fiber core switching device and method, belonging to the field of optical fiber core testing technology. Technical solution: Multiple fiber cores at the optical distribution end are respectively inserted into the front female opening of the fixed connecting flange at the top of the corresponding linear track. The pigtail end of the test end is equipped with a connector, which is fixed to a sliding seat. The pigtail end of the test end can be inserted into the back female opening of the fixed connecting flange. The sliding seat is equipped with a switching handle. By using the switching handle, the sliding seat slides along a linear track towards the fixed connecting flange at the top of the track, inserting the pigtail of the test end into the back female opening of the fixed connecting flange, thus completing the connection between the pigtail of the test end and a fiber core of the optical distribution end. The test core is then tested using testing equipment connected to the test end. This invention is convenient to operate, precise and efficient, significantly reduces labor costs, has high testing accuracy, effectively prevents hidden faults, has strong adaptability, and is easy to install.

This invention discloses an optical frequency domain reflectometer, comprising a beam splitting module, a main interference module, and an auxiliary interference module. The beam splitting module splits a swept laser provided by a laser into a first detection signal and a first reference signal. The auxiliary interference module generates a reference interference signal based on the first reference signal. The main interference module includes a free-space optical circulator and a first beam splitting unit and a first coupling unit, all of which are free-space optical devices. In this embodiment, the main interference module uses only free-space optical devices, fundamentally eliminating the inherent insertion loss accumulation and Fresnel reflection array of cascaded fiber optic devices. This significantly improves the coherent mixing signal-to-noise ratio and measurement repeatability while eliminating the need for pigtail interconnects and adhesive sealing nodes, thereby reducing the overall size and enhancing vibration resistance, ultimately meeting the deployment requirements of engineering and uncontrolled scenarios.

This invention relates to the field of optical communication technology, and in particular to a single-fiber bidirectional device and its optical module with specific wavelength reflection, comprising: a transmitting TO-CAN, a receiving TO-CAN, an integrated tube, and a pigtail pin; the transmitting TO-CAN is coupled to one end of the integrated tube, the receiving TO-CAN is coupled to the side of the integrated tube, and the pigtail end of the pigtail pin is coupled to the other end of the integrated tube; a beam splitter and a filter are disposed at the central axis of the integrated tube, the beam splitter being used to reflect light returned from the pigtail pin into the receiving TO-CAN; the filter is disposed at the light inlet of the receiving TO-CAN; a grating fiber core is disposed inside the pigtail pin, the grating fiber core being located at the end of the pigtail pin, the grating fiber core being used to reflect light of a specific wavelength in the optical signal transmitted by the transmitting TO-CAN into the receiving TO-CAN.

The present disclosure relates to the field of coupling and packaging of high-temperature sensors, in particular, to a coupling and packaging device and method for an integrated high-temperature optical fiber sensor based on laser fusion splicing. The device includes: a laser fusion splicing module, a motion control module, and a signal detection module, wherein the laser fusion splicing module is configured to provide fusion splicing laser to the motion control module to weld and fix a tail end of an optical fiber pigtail and a sensitive unit; the motion control module includes a three-dimensional displacement platform as pedestal, an optical fiber five-dimensional displacement platform, an optical fiber clamping member, a sensitive unit clamping member, a rotating platform, and a sensitive unit three-dimensional displacement platform, and is configured to achieve the alignment and adjustment of a fusion splicing position; and the signal detection module is configured to monitor a spectral signal in the sensor in real time. The present disclosure may achieve the integrated coupling and packaging of a homogeneous material of the high-temperature optical fiber sensor.

The invention discloses a fiber bragg grating sensor capable of decoupling temperature and strain data. The fiber bragg grating sensor comprises a composite material sensing sheet and an optical fiber, the composite material sensing sheet is formed by curing a plurality of layers of unidirectional carbon fiber prepreg and a resin matrix; the optical fiber is implanted into the composite material sensing sheet and comprises a Bragg fiber grating and a tail fiber; the laying direction of the unidirectional carbon fiber prepreg is perpendicular to the axis direction of the optical fiber; a resin enrichment area is formed around the Bragg fiber grating in the curing process; after high-temperature curing, the refractive index of the section of the Bragg fiber grating is non-uniformly distributed, so that a reflection spectrum generates two different Bragg peaks. According to the invention, a residual stress field is utilized to enable a single Bragg fiber grating to generate a stable birefringence effect, so that a reflection spectrum of the single Bragg fiber grating is naturally split into two Bragg reflection peaks, the sensitivity coefficients of the two reflection peaks to temperature are different, but the sensitivity coefficients of the two reflection peaks to strain are the same, and decoupling from the source of a sensitive element level is realized.