151results about How to "Low bending loss" patented technology

The invention discloses a hollow anti-resonance optical fiber, and belongs to the technical field of optics and laser photoelectrons.The basic structure of the hollow anti-resonance optical fiber comprises a fiber core area with low refraction rate and a wrapping layer area with high refraction rate.The wrapping layer area with high refraction rate is divided into an inner wrapping layer region and an outer wrapping layer region.The inner wrapping layer region is composed of one or two layers of micro capillary pipes.The fiber core area with low refraction rate is wrapped by the inner wrapping layer region.Compared with a traditional band gap type hollow-core photonic crystal fiber, the hollow anti-resonance optical fiber has the advantages of being large in spectral bandwidth, small in bending loss, low in transmission loss, high in damage threshold and capable of keeping single-modulus transmission.A high-efficiency and high-sensitivity ideal platform is created for nonlinear frequency conversion, trace gas / liquid detection, high-power pulse compression and other foremost application.

A radiation resistant single-mode optical fiber has a core and a cladding, each made of fluorine-doped silica glass, in which a chlorine concentration of the core is at least 0.01 ppm, a relative refractive index difference of the core based on the refractive index for silica is between −0.30 and −0.10%, a relative refractive index difference of the core based on the refractive index for the cladding is between 0.3% and 0.5%, a cutoff wavelength is 1.27 μm or below, and a bending loss at a wavelength of 1.3 μm and a bending diameter of 20 mm is 0.5 dB / m or less.

An optical fiber with improved bending behavior is disclosed. The optical fiber, a single mode optical fiber having core and clad, satisfies alpha-profile wherein a refractive index in the core is increased toward its center, and has a specific refractive index difference Delta1 in the central region of the core and Delta2 at a radius rcore of the core. The optical fiber also satisfies a mode field diameter of 8.6~9.5 m at 1310nm wavelength, a zero dispersion wavelength of 1300~1324nm, a dispersion of 18 ps / nm-km or less at a 1550nm, a cable cutoff wavelength of 1260nm or less, a bending loss of 0.1dB or less at 1625nm when wound 100 times with a bending radius of 25mm. Thus, the optical fiber may satisfy every optical characteristic such as zero dispersion wavelength and dispersion at 1500nm, suggested by the general and common signal mode optical fiber, though the bending loss is decreased.

The invention discloses a bending insensitive single mode fiber. The fiber comprises a fiber core, inner cladding, subsidence cladding and outer cladding. The refractive index of the fiber core is n1, the refractive index of the inner cladding is n2, the refractive index of the subsidence cladding is n4, the subsidence cladding of the outer cladding is n3, the refractive index n1 remains unchanged along with increasing of the radius of the fiber core, the refractive index n2 remains unchanged along with increasing of the radius of the inner cladding, the refractive index n4 of the subsidence cladding is increased along with increasing of the radius until the refractive index n4 of the subsidence cladding is the same as the refractive index n3 of the outer cladding, n1>n2>n3>n4, n4 is increased along with increasing of the radius, no obvious refraction face exists, the refractive index of the interface is progressively increased from interior to exterior, and therefore optical loss due to the fact that a light intensity tail field is exposed out of the refraction face is avoided. Therefore, compared with a traditional similar optical fiber, the bending insensitive single mode fiber has the better bending resistance performance and the smaller bending loss and has the better compatibility with the G.652D.

The invention relates to a single-mode optical fiber and an optical system, the single-mode optical fiber comprises a central core, an intermediate cladding, a trench, and optical cladding. The central core has a refractive index difference n 1 relative to the optical cladding in the range 2.610 -3 to 3.510 -3 . The trench has a radius r 3 that is less than 24 [mu]m. The refractive index difference n 3 of the trench relative to the optical cladding is in the range -15.010 -3 to -4.510 -3 at 633 nm. The volume V 13 of the trench, defined as follows: V 13 is in the range 170 %.[mu]m 2 to 830 %.[mu]m 2 . This fiber has an effective area greater than or equal to 150 [mu]m 2 at a wavelength of 1550 nm and lower bending losses. Use in particular in long-haul terrestrial systems or undersea systems with or without repeaters.

The invention discloses an electrically controlled micronano optical fiber optical switch based on a graphene thin film. The electrically controlled micronano optical fiber optical switch comprises a tapering light output micronano optical fiber, a tapering light input micronano optical fiber and a circuit control module based on the graphene thin film, wherein in the circuit control module based on the graphene thin film, a silicon base coated with the graphene thin film is used as a center; a metal electrode is arranged on the rim of the silicon base; the tapering light output micronano optical fiber and the tapering light input micronano optical fiber are oppositely arranged on the graphene silicon base; the ends of the two micronano optical fibers are adsorbed together by a van der Waals force, and serve as a coupling end of a light path; and ultraviolet photoresist with low refractive index is coated on the micronano optical fibers. On the basis of the property of graphene, the novel optical fiber optical switch has the characteristics of small size, short response time, low driving voltage and improved reliability by combining the evanescent wave characteristics of the micronano optical fibers.

The invention discloses a dual-mode optical fiber and a communication system thereof. The dual-mode optical fiber comprises an optical fiber core and a cladding, and in a wavelength range of between 1.25 and 1.65mu m, nclad-ncore is more than 0.004, and r is more than 4.5mu m, wherein the nclad is the cladding refractive index, the ncore is the optical fiber core refractive index, and the r is radius of the optical fiber core; the cut-off wavelength lambda c of an LP02 model of the optical fiber is between 1.1 and 1.25mu m, and the optical fiber maintains dual-mode transmission; and the mode field diameter M of the optical fiber equals to 8 to 10.5mu m at the wavelength of 1,310nm. The optical fiber communication system comprises a dual-mode optical fiber, a single-mode optical fiber, a light transmitter and a light receiver, wherein two ends of the dual-mode optical fiber are connected with the single-mode optical fiber respectively; and the other ends of the single-mode optical fiber are connected with the light transmitter and the light receiver respectively. The dual-mode optical fiber has low bending loss and large mode field, and the communication system can realize single-mode transmission and low connection loss of a broad range.

The invention belongs to the photoelectronic technical field, and discloses an M-Z electrooptical modulator provided with tunable gratings and based on graphene-molybdenum disulfide heterojunctions. The M-Z electrooptical modulator comprises a substrate layer, the in-out tunable gratings, in-out straight-light waveguides, S-type bent Y-branch waveguides and a two-arm straight light waveguide, wherein the in-out tunable gratings, the in-out straight-light waveguides, the S-type bent Y-branch waveguides and the two-arm straight light waveguide are fully embedded in the substrate layer and successively connected with each other, and the two-arm straight light waveguide is successively provided with a second graphene layer, molybdenum disulfide and a first graphene layer from the bottom up; the second graphene layer is connected to a second electrode mounted between the two arms, and each in-out tunable grating is successively provided with a fourth graphene layer, a boron nitride isolation layer and a third graphene layer while the third and the fourth graphene layers are connected to the a fourth electrode and a fifth electrode respectively. Compared with the prior art, the M-Z electrooptical modulator has the advantages of being small in size, easy to integrate, deep in modulation, high in extinction ratio, big in temperature tolerance and the like.

The invention provides a gas detection system based on a hollow-core anti-resonance optical fiber. The gas detection system comprises a laser device, a first gas cavity, a hollow-core anti-resonance optical fiber, a second gas cavity, a spectrograph and a data processing device, wherein two ends of the hollow-core anti-resonance optical fiber are respectively communicated with the first gas cavityand the second gas cavity; the first gas cavity and the second gas cavity are used for injecting to-be-detected gas into the hollow-core anti-resonance optical fiber; the laser device is used for inputting detection laser into the hollow-core anti-resonance optical fiber; the spectrograph is used for measuring Raman scattering light generated by to-be-detected gas; and the data processing deviceis used for processing a Raman spectrum and analyzing the contents and concentration of to-be-detected gas. The hollow-core anti-resonance optical fiber has the characteristics that the transmission loss is low, the transmission bandwidth is wide, the bending loss is low, the damage threshold is high, and single mode transmission is maintained; and the Raman scattering threshold is reduced, and the contents and the concentration of trace gas can be detected by virtue of pump light with relatively low power.

The invention relates to a terahertz low-loss bent waveguide which comprises an outer waveguide plate and an inner waveguide plate. The outer waveguide plate and the inner waveguide plate are bent metal plates and bent portions of the plates are arc. The outer waveguide plate is parallel to the inner waveguide plate with a distance in between. Periodical grooves are formed in opposite surfaces of the outer waveguide plate and the inner waveguide plate. Terahertz waves are input from one end of the outer waveguide plate and one end of the inner waveguide plate in a horizontal magnetic wave mode and enter a gap between the outer waveguide plate and the inner waveguide plate so that surface waves can be transmitted in the gap, and are further transmitted to the other end of the outer waveguide plate and the outer end of the inner waveguide plate. Thus, low-loss bent transmission of the terahertz waves is achieved. According to the technical scheme, the bent loss of the terahertz waves is low and the terahertz low-loss bent waveguide is simple in structure, convenient to use and low in cost.

The invention discloses an all-solid LMA photonic band gap optical fiber. The all-solid LMA photonic band gap optical fiber comprises fiber core and cladding, wherein the fiber core comprises base materials (1) and low-reflective-index medium columns (2) which are distributed in a regular-triangular grid; the cladding comprises the base materials (1) and high-reflective-index medium columns (3). The all-solid LMA photonic band gap optical fiber binds light through the high-reflective-index medium columns, thereby having relatively strong binding capacities and relatively low bending losses; the low-reflective-index medium columns distributed cyclically in the center of the optical fiber can enlarge the loss difference between fundamental modes and high-order modes to distinguish the fundamental modes from the high-order modes and to further enable the optical fiber to achieve single-mode transmission. Due to the fact that the low-reflective-index medium columns are of a multi-layer structure, the optical fiber can obtain a large mode area. Meanwhile, the all-solid LMA photonic band gap optical fiber is of an all-solid structure and accordingly avoids the difficulty in manufacturing and usage of micro-structure optical fibers with air holes, and can achieve LMA low-bending-loss single-mode transmission.

The invention relates to a single mode fiber and a manufacturing method thereof. The single mode fiber comprises a core layer and a covering layer. The single mode fiber is characterized in that the diameter a of the core layer is 9.9-10.9 micrometers, and the delta 1 is 2.1*10<-3>-3.8*10<-3>; the covering layer outside the core layer sequentially comprises an inner covering layer, a sunk covering layer and an outer covering layer from inside to outside; the diameter b of the inner covering layer is 16-22 micrometers, and the delta 2 is -5*10<-4>-5*10<-4>; the diameter c of the sunk covering layer is 24-38 micrometers, and the delta 3 is -15*10<-3>--3*10<-3>, and the width of the sunk covering layer is 4-11 micrometers. According to the single mode fiber, the effective area of the fiber is equal to or larger than 110 micrometer <2>, and the nonlinear effect in the transmission fiber is lowered effectively. In addition, the comprehensive performance parameters of the cutoff wavelength, the bending loss, the chromatic dispersion and the like are good in the application wave band, so that the single mode state of optical signals of the fiber in transmission and application of the C wave band is guaranteed. The size of the core layer of the fiber is controlled reasonably, so that the manufacturing cost of the fiber is lowered effectively, and good balance between the manufacturing cost of the fiber and the performance parameters of the fiber is achieved.

The invention relates to a low-bend loss single mode fiber comprising a core and a cladding, wherein the cladding comprises an inner cladding, a depressed cladding and an outer cladding from the inside to the outside; the core has a diameter 2R1 of 8.2[mu]m-9.4[mu]m and a relative refractive index difference delta1 of 0.360%-0.420%; the inner cladding has a diameter 2R2 of 16.0[mu]m-19.0[mu]m anda relative refractive index difference gradually changing from the inner edge to the outer edge, wherein the maximum relative refractive index difference delta2max is 0.02%-0.10%, and the outer edge,that is, the junction between the inner cladding and the depressed cladding has a relative refractive index difference of 0.0%; the depressed cladding has a diameter 2R3 of 28.0[mu]m-35.0[mu]m and a relative refractive index difference delta3 of 0.40%-0.65%, and the outer cladding is a pure silica outer cladding. The single mode fiber provided by the invention has a low bending loss under the condition of ensuring a large mode field diameter of the optical fiber due to a reasonable configuration of the refractive index profile to improve the bending performance of the optical fiber, and the bending performance of the optical fiber exceeds a G.657.B3 standard to meet the needs of access networks and some miniaturized optical devices.

Disclosed herein is a flexible film optical waveguide, which is in flexible film form and includes upper and lower cladding layers, each of which is formed of an organic-inorganic hybrid material, and a core layer provided between the upper and lower cladding layers and formed of an organic-inorganic hybrid material having a refractive index higher than that of the organic-inorganic hybrid material of each of the upper and lower cladding layers. In addition, a method of fabricating such a flexible film optical waveguide is also provided.

The invention relates to a gain photon crystal optical fiber waveguide, which is composed of a core layer and a coating layer which surrounds the core layer. The inner coating layer of the optical fiber comprise solid microstructure point lattice which is formed by germanium-doped silica column, and forms outer bandgap of the gain optical fiber, the function thereof is that the multimode pump light can be strictly restricted in a second fiber core region which is provided with rare earth dopant ion, and improves the utilizing efficiency of the pump light; the second fiber core of the optical fiber is composed of the solid microstructure point lattice which is formed the rare earth ion silica column to form the inner bandgap of the gain optical fiber, the function thereof is that through the multimode pump light, the generated laser light can be strictly restricted in a first fiber core region which is formed by high pure silica glass. Adopting the solid gain photon crystal optical fiber can greatly improve the utilization efficiency of the pump light, improve beam quality of output laser light, enhance output power of the optical fiber laser, and reduce nonlinear effect of the high-power laser device.

An anti-resonant hollow core optical fiber having multiple resonant layers. The optical fiber comprises a low-refractive index core region (1) and a high-refractive index cladding region. The high-refractive index cladding region comprises an inner cladding region (4) and an outer cladding region (5). The outer cladding region (5) clads the inner cladding region (4) and the core region (1). The inner cladding region (4) comprises a first anti-resonant layer (2) and a second anti-resonant layer (3), and the first anti-resonant layer (2) and the second anti-resonant layer (3) surround the core region (1); and the first anti-resonant layer (2) comprises several layers of microcapillary tubes, and the second anti-resonant layer (3) supports the first anti-resonant layer (2). The optical fiber adopts a double-cladding structure and uses two or more anti-resonant layers such that theoretically simulated loss is reduced to 0.1 dB / km, and has the features of ultralow transmission loss, wide spectral bandwidth, low bending loss, low transmission loss, high damage threshold and single-mode transmission.

The invention discloses a satellite-borne damping variable shock absorber which comprises a piston assembly, a piston cylinder, an elastic support device, a damping generation device and a sensing device; and the sensing device comprises a fiber bragg grating sensor (2), a photonic crystal fiber (3) and a fiber bragg grating demodulator (4). According to the invention, a fiber bragg grating is modulated to serve as a vibration sensor. Compared with the prior art, the shock absorber provided by the invention has the advantages that the weight is light, the structure is simple, and the flexibility is high, and the real-time feedback of vibration frequency can be realized; and simultaneously, the photonic crystal fiber is adopted as a transmission medium for sensing signals, the bending lossgenerated by optical fiber wiring can be reduced, especially the stretching loss under a vibration motion environment is reduced, and the control accuracy is improved.

The invention discloses a planar two-waveband surface plasmon waveguide based on a composite cycle structure. The planar two-waveband surface plasmon waveguide comprises a composite cycle straight-metal grating structure and a composite cycle arc-metal grating structure, wherein the composite cycle straight-metal grating structure and the composite cycle arc-metal grating structure are printed on a flexible medium and are in tangent connection. A row of deep grooves A and a row of shallow grooves B are formed in a staggered mode in the same sides of the composite cycle straight-metal grating structure and the composite cycle arc-metal grating structure. One of the composite cycle straight-metal grating structure and the composite cycle arc-metal grating structure serves as an input end of the waveguide, the other one of the composite cycle straight-metal grating structure and the composite cycle arc-metal grating structure serves as an output end of the waveguide, and a metallic conducting wire is arranged on the front side of the input end, serves as a feed source, and is used for exciting two-waveband surface waves on the input end. According to the planar two-waveband surface plasmon waveguide based on the composite cycle structure, a plasma straight waveguide and a bent waveguide of an ultrathin flexible thin film based on the composite cycle structure are achieved at the first time in a microwave section. The planar two-waveband surface plasmon waveguide based on the composite cycle structure has the advantages of being simple in structure, convenient to manufacture, and capable of adapting being used in the microwave section.

The invention discloses a silicon dioxide waveguide and lithium niobate film vertically-coupled resonant integrated optical gyroscope. The resonant integrated optical gyroscope comprises a base wafer,a lower coating layer, a silicon dioxide waveguide ring, a silicon dioxide straight waveguide, an upper coating layer, a lithium niobate film, an electric-optic frequency shifter optical waveguide, an electric-optic frequency shifter metal electrode and a lithium niobate straight strip optical waveguide. A light wave passing through electric-optic frequency shifting inside a lithium niobate filmoptical waveguide can be guided into the silicon dioxide waveguide ring along the vertical direction for angular speed measurement; the characteristics, such as low transmission loss and low bending loss, of the silicon dioxide waveguide ring are combined with the electric-optic frequency shifting function of lithium niobate crystal; the problem that an integrated optical frequency shifter is difficult for the integrated optical gyroscope based on the silicon dioxide waveguide to manufacture is overcome, and the problem that the waveguide ring inside the integrated optical gyroscope based on the silicon dioxide waveguide is great in bending loss and excessive in ring semi-diameter is also solved, so that the integration level and practical value of the resonant integrated optical gyroscopeare improved, and the resonant integrated optical gyroscope is applicable for realizing batch production.

The invention relates to a multi-core fiber with low crosstalk between cores, and belongs to the field of optical fiber communication. The multi-core fiber with low crosstalk between the cores is characterized by comprising a middle core (1), an annular groove structure (I) around the periphery of the middle core, six outer cores (2)-(7) extending along the fiber axis and arranged in a regular hexagon shape, annular groove structures (II) and annular groove structures (III) around the peripheries of the six outer cores correspondingly, and wrapping layers covering the middle core, the six outer cores and the groove structures (I), (II) and (III). Different refractive indexes are arranged in the adjacent groove structures (I), (II) and (III) correspondingly, and the refractive index difference among the adjacent groove structures (I) and (II), (II) and (III) is no less than 0.001, and thus the purpose of suppressing crosstalk between the cores is achieved. Meanwhile, since the core structures are the same, the multi-core fiber with low crosstalk between the cores has smaller melting loss than ordinary single mode fibers, is facilitated to being drawn into the fiber, can be widely applied to air-division multiplexing optical fiber transmission system and other fields, and has broad application prospects.

An optical fiber includes a first core having a relative refractive index difference of larger than 0.36%, and a cladding. The optical fiber has fiber cut-off wavelength lambdac of more than 1350 nm, cable cut-off wavelength lambdacc of less than 1285 nm, bending loss at a wavelength of 1625 nm of not more than 10 dB / km when wound at a diameter of 20 mm, transmission loss at a wavelength range of 1285 to 1625 nm of not more than 0.40 dB / km, transmission loss at a wavelength of 1383 nm less than transmission loss at a wavelength of 1310 nm, and difference in transmission loss at a wavelength of 1383 nm of not more than 0.04 dB / km before and after exposure to hydrogen. The lower bending loss of the optical fiber provides an optical fiber cable for use in a WDM transmission in wavelength range of 1285 to 1625 nm.

The invention relates to an optical fiber for maintaining vortex beam transmission, and a manufacturing method of the optical fiber. The refractive indexes of all cladding layers inside the optical fiber are reasonably configured, and in combination with a rotary wire drawing technology, a spun optical fiber having distributed refractive indexes and applied to a ring structure for maintaining transmission of vortex beam with orbital angular momentum is provided; and the optical fiber has the characteristics of low loss, low bending loss, relatively low chromatic dispersion, relatively large effective area, simple structure, low price, easy for industrial production and the like, is suitable for mode division multiplexing and space division multiplexing systems in optical communication, canbe applied to optical fiber laser devices and optical fiber sensors to perform vortex beam transmission and generation, and has good popularization and application values.

The invention discloses a tortuous two-way surface wave splitter, which comprises two metal grating structures (1) and metal wires, wherein each metal grating structure (1) is adjustable in thickness and tortuosity; the metal wires are arranged at one end of each of the two metal grating structures (1); the surfaces of the two metal grating structures (1) are provided with grooves (12) with different structural parameters respectively; and the structural parameters comprise a depth, a width, a cycle and a cross section shape. In the tortuous two-way surface wave splitter, artificial surface plasmas on the metal grating structures (2) of which the surfaces are provided with the grooves (12) are excited by the metal wires. The tortuous two-way surface wave splitter realizes the functions of the two-way surface wave splitter with relatively lower bending loss for the first time, and is simple, effective, convenient to machine and wide in application range.

The invention discloses a bending-insensitive single mode fiber and a manufacturing method of the bending-insensitive single mode fiber. The bending-insensitive single mode fiber comprises a fiber core and wrapping layers, wherein the wrapping layers outside the fiber core sequentially include the inner wrapping layer, the fluorine-doped refractive index lowering wrapping layer and the outer wrapping layer from inside to outside. The manufacturing method of the bending-insensitive single mode fiber includes the following steps of firstly, manufacturing a mandrel according to a VAD method; secondly, manufacturing the fluorine-doped refractive index lowering wrapping layer according to an OVD method; thirdly, depositing the outer wrapping layer outside the fluorine-doped refractive index lowering wrapping layer to obtain a fluorine-doped wrapped pipe; fourthly, inserting the mandrel into the fluorine-doped wrapped pipe, and sintering the mandrel and the fluorine-doped wrapped pipe into a whole; fifthly, conducting optical fiber wire drawing so that the manufactured optical fiber stick can be drawn to form an optical fiber. Compared with a traditional similar optical fiber, the bending-insensitive single mode fiber has better bending prevention performance and smaller bending loss and can be better compatible with G.652D, and the manufacturing method is simple.

The invention provides a wideband semi-step type multimode optical fiber. The wideband semi-step type multimode optical fiber comprises a fiber core layer and a coating layer, wherein GeO2 (germanium dioxide) and / or P2O5 (phosphorus pentoxide) and / or F (fluorine) is doped into the fiber core layer; the fiber core layer comprises a transient area and a platform area in a concentric way; the transient area is formed by extending from the center of the fiber core layer to the outside with the distance of R1; the platform area is formed by extending from the center R1 of the fiber core layer to the outside with the distance of R2-R1 until to the boundary of the fiber core layer. The distribution of refractive index of the wideband semi-step type multimode optical fiber meets the formula which is shown in the attached figure, wherein r is the radial distance away from a fiber core axis of the fire core layer; R2 is the radius of the fiber core layer; Rmax is the radius of the coating layer; n0 is the refractive index of the center of the fiber core layer; nR1 is the refractive index of the boundary of the gradient zone; nc is the refractive index of the coating layer; delta0 is the relative refractive index difference between the center of the fiber core layer and the boundary of the transient area, and is shown in the attached figure.

The invention discloses a preparation method of an optical fiber preform. The method comprises the following steps: (1) adopting the vapor axial deposition (VAD) technology to prepare an optical fibre mandrel, adopting the plasma chemical vapor deposition (PCVD) to prepare a fluorine-doped sunken coating; (2) using the optical fibre mandrel and fluorine-doped sunken coating prepared in the step (1) to perform melt polycondensation and obtain an optical fibre mandrel preform; and (3) installing the optical fibre mandrel preform on an outside vapor deposition (OVD) lathe to perform the deposition of an outside coating, and sintering to obtain a transparent optical fiber preform after the deposition. By adopting the method of the invention, the manufacturing efficiency of the bending insensitive single mode fiber preform can be greatly increased, the production cost can be reduced, the large-scale production is easy to popularize and the requirements of the high-speed broadband access network on the development of the bending insensitive single mode fiber can be met; and the deposition efficiency of fluorine can be increased, the sinking depth of the fluorine deposition coating can be increased and the bending resistance of optical fibre can be significantly increased.

The invention discloses an optical waveguide chip with a micro-optical gyroscope Sagnac effect and a preparation method thereof. The optical waveguide chip comprises a substrate, an SiO2 (Silicon Dioxide) lower cladding layer and an SiO2 core area light guide, wherein the SiO2 core area light guide comprises an input straight waveguide part, two arc-shaped bend waveguide parts, an Achimedean spiral bending waveguide part and an output straight waveguide part; an input straight waveguide part of the SiO2 lower cladding layer and a spiral ring of the Achimedean spiral bending waveguide part are vertically crossed, so as to reduce the loss of an X Achimedean spiral bending waveguide part; two arc bending waveguide parts are oppositely connected, an input direct waveguide terminal and a starting end of the Achimedean spiral bending waveguide part are smoothly connected, and an optimal dislocation offset can be guided on the end plane of a wave guide connecting place, so that the bending loss is less. According to the optical waveguide chip, the sensitivity of the gyroscope can be improved, and the noise of the gyroscope can be reduced.

The invention relates to a flexible ultra-long surface plasmon polariton waveguide which comprises a photoelectric input end, a photoelectric output end, a flexible substrate and a flexible surface plasmon polariton waveguide line array, wherein the flexible surface plasmon polariton waveguide is manufactured on the flexible waveguide substrate, then a planar waveguide structure is bent, edges are further aligned for welding, and an ultra-long surface plasmon polariton waveguide structure with the independent photoelectric input end and the photoelectric output end is finally formed. The flexible surface plasmon polariton waveguide array comprises a flexible organic polymer cladding layer and a waveguide metal core layer, a selected metal material is gold, silver, copper, aluminum and other precious metal materials with surface plasmon resonance property in a light frequency wave band, and all light waveguide structures are made of an organic flexible polymer material, so that the flexible ultra-long surface plasmon polariton waveguide has great flexibility, can be bent arbitrarily and even folded, is small in volume and can further improve portability; and the surface plasmon polariton waveguide capable of simultaneously conducting photoelectric signals is adopted as a core layer, so that the obstacle that the photoelectric signals are not compatible is broken.