95 results about "Optical coefficient" patented technology

The invention relates to the technical field of damage detection, and discloses a screen protection film damage detection method and system, and the method comprises the steps: carrying out the laser interference thickness scanning of a screen protection film, and obtaining three-dimensional thickness distribution data and thickness gradient vector field data; performing multi-layer polarization interference detection on the circularly polarized light beam based on the three-dimensional thickness distribution data to obtain polarization phase difference distribution data; according to the thickness gradient vector field data, non-periodic phase unenveloping processing is carried out on the polarization phase difference distribution data to obtain continuous polarization phase distribution data; performing stress optical coefficient tensor calculation and dynamic elliptical polarization modulation based on the continuous polarization phase distribution data to obtain stress damage space positioning data; the edge cutting area and the center bending area of the screen protection film are subjected to damage imaging reconstruction, a three-dimensional stress damage imaging result is obtained, and full-chain detection from geometric thickness change to stress distribution and then to damage positioning is achieved.

The invention discloses acousto-optic chalcogenide glass with a high laser damage threshold, the chemical composition formula of the acousto-optic chalcogenide glass is GexSySez, x, y and z respectively represent the mole fractions of Ge, S and Se, x = 10-30, y = 5-40, z = 40-70, x + y + z = 100, and the microscopic network structure of the acousto-optic chalcogenide glass contains a [GeSe4] tetrahedron, a [GeSSe3] tetrahedron, a [GeS2Se2] tetrahedron, a [GeS3Se] tetrahedron, a [GeS4] tetrahedron and a Se ring. The acousto-optic chalcogenide glass provided by the invention has a relatively high laser damage threshold Fth (9.72-15.58 J / cm < 2 > at1550 / 20ns / 5kHz), a relatively low thermo-optic coefficient dn / dT and good acousto-optic characteristics and mechanical properties, is high in near-infrared band transmittance, and has a relatively high laser damage threshold while ensuring a high acousto-optic quality factor. The material can be used as a material basis for developing high-performance and high-stability infrared acousto-optic modulation devices.

The invention discloses a polydimethylsiloxane sensitization optical fiber temperature and strain simultaneous measurement sensor. The sensor comprises an incident optical fiber, an optical fiber coupler, an optical fiber patch cord, a transmission optical fiber, a sensing cavity, a reference cavity and an emergent optical fiber, an optical signal enters the optical fiber coupler through the incident optical fiber and is divided into two beams of equal-intensity light in the coupler, the two beams of light are respectively input into the transmission optical fiber through the optical fiber patch cord and then enter the sensing cavity and the reference cavity which are coated with the polydimethylsiloxane, and the light is reflected by the cavities to form interference; the interference light is transmitted back to the optical fiber coupler through respective transmission optical fibers, so that a vernier spectrum is formed; the emergent optical fiber transmits an optical signal containing temperature strain information to a spectrograph, trough drift is analyzed through a dual-wavelength matrix demodulation method, and simultaneous measurement is achieved. By combining the vernier effect, the structural advantages of the Fabry-Perot interferometer and the advantage of high thermo-optical coefficient of the polydimethylsiloxane, the invention has the advantages of low cost, high sensitivity, high stability and the like.

The present disclosure provides a free space optical system for optically transmitting processed radio frequency signals through a variably refractive medium. The system may include a transmitting element configured to receive a first signal and process it to generate a time-division combined signal. The transmitting element includes an optical source to generate a beam of light, a modulator to modulate the beam of light based on the time-division combined signal, and an amplifier to amplify the modulated beam of light, which is transmitted through the variably refractive medium. A receiving element includes a photoreceiver to receive the amplified beam of light and extract a second time-division combined signal, a correction unit to correct distortion in the second time-division combined signal, a mixer to multiply the corrected signal with a predetermined frequency signal, an amplifier to amplify the multiplied signal, and an antenna to emit a radio signal generated from the amplified multiplied signal.

A hybrid integrated electro-optical modulator comprises a base layer structure, and a signal input area, a signal modulation area and a signal output area are sequentially arranged on the base layer structure in the signal transmission direction. The signal modulation area comprises a metal electrode structure, a plurality of transmission channels are arranged in the metal electrode structure at intervals, the transmission channels are arranged in the signal transmission direction, and the two ends of each transmission channel are communicated with the signal input area and the signal output area respectively; a first silicon waveguide, a lead zirconate titanate section and a second silicon waveguide which are sequentially connected in the signal transmission direction are arranged in the transmission channel, and the two sides of the first silicon waveguide, the lead zirconate titanate section and the second silicon waveguide are attached to the two side walls of the transmission channel. The lead zirconate titanate in the signal modulation region has a relatively high electro-optic coefficient, so that the problems that the electro-optic coefficient of a thin-film lithium niobate modulator is limited, the length of the device is generally in the centimeter magnitude, and high bandwidth, low driving voltage, small size and the like are difficult to meet at the same time in the related technology are effectively solved.

The invention discloses a thin-film barium titanate electro-optical switch unit based on a composite electrode and an array thereof. The optical switch unit comprises a first waveguide optical fiber coupling module, a second waveguide optical fiber coupling module, an optical beam splitting module, an electro-optical phase shift region, an optical beam combining module, a third waveguide optical fiber coupling module and a fourth waveguide optical fiber coupling module. Wherein the composite electrode of the electro-optic phase shift region is composed of a metal electrode and a transparent conductive layer, the electrode is closer to the waveguide by utilizing the transparent characteristic of a transparent conductive material, the coupling of a light field and an electric field is effectively enhanced, and the extinction ratio is improved. Meanwhile, a barium titanate film with a high electro-optical coefficient is adopted as a waveguide material, and the performance is further optimized, so that the electro-optical switch unit has the excellent characteristics of low-voltage driving, high extinction ratio, low insertion loss and small size.

Aluminoborosilicate glass compositions, products including the same, methods of making the same, and methods of using the same are provided. Such glass compositions include an alkaline earth metal oxide. The glass composition includes low concentrations of boron oxide and strontium oxide. Such glass compositions may be substantially alkali free. The glass compositions exhibit desirable physical and chemical properties, such as high annealing point, high modulus of elasticity, low stress optical coefficient (SOC), low T (35kP) and T (200P), and desirable liquid phase viscosity. The glass composition is suitable for use as a substrate in a flat panel display device having ultra-high resolution, such as an active matrix liquid crystal display (AMLCD).

The invention relates to a preparation method of a lead zirconate titanate film of a spatial light modulator, which comprises the following steps of: depositing a lead zirconate titanate target material on a prepared substrate by using a magnetron sputtering method to form a layer of lead zirconate titanate film; annealing the substrate deposited with the lead zirconate titanate film to enable the lead zirconate titanate film to form a compact crystal structure, and after annealing is completed, naturally cooling the substrate to room temperature; and sputtering an electrode material in a selected area on the surface of the formed lead zirconate titanate film to complete the preparation of the spatial light modulator. A magnetron sputtering method is adopted to deposit a lead zirconate titanate target material on a substrate to form a uniform and high-quality lead zirconate titanate film, a traditional material is replaced, and the electro-optical coefficient is improved; annealing the substrate deposited with the lead zirconate titanate thin film to form a compact crystal structure, optimizing the crystallization quality of the thin film, improving the stability and durability and meeting the long-term stable operation requirement, and sputtering an electrode material in a selected area on the surface of the lead zirconate titanate thin film to complete the preparation of the spatial light modulator.

Aluminosilicate or aluminoborosilicate glass compositions and products comprising the same are provided. Such glass compositions are substantially alkali-free and include alkaline earth metal oxides. The glass composition may include a low concentration of boron oxide. The glass compositions exhibit desirable physical and chemical properties, such as improved annealing point (e.g., above 775 DEG C), improved elastic modulus, reduced stress optical coefficient (SOC), and desirable liquidus viscosity. The glass composition is suitable for use as a substrate in a flat panel display device having ultra-high resolution, such as an active matrix liquid crystal display (AMLCD).

A temperature measurement device (1) comprises: a light emission unit (10) that generates coherent, continuous measurement-light; a light detection unit (30) that detects reflected light or transmitted light of the continuous measurement-light which is projected onto a sample (50) to be measured; and an analysis unit (42) that calculates a temperature distribution of the sample (50) to be measured on the basis of the intensity of the reflected light or the transmitted light detected by the light detection unit (30). The analysis unit (42) calculates the optical thickness of the sample (50) to be measured from a temporal change in the intensity of the reflected light or the transmitted light and, by using a refractive index distribution model representing the relationship between the optical thickness and a refractive index distribution in the thickness direction of the sample (50) to be measured at the time of a temperature change, calculates the refractive index distribution from the optical thickness, and calculates the temperature distribution of the sample (50) to be measured by converting the refractive index distribution into the temperature distribution on the basis of the thermo-optical coefficient of the sample (50) to be measured.

An optical device and its manufacturing method are disclosed, comprising two distinct optical paths: a first optical path including a first waveguide core and a first cladding adjacent to the first waveguide core; and a second optical path including a second waveguide core and a second cladding adjacent to the second waveguide core. The thermo-optical coefficient (TOC) of the first waveguide core and the thermo-optical coefficient of the first cladding have the same sign, for example, positive, while the sign of the thermo-optical coefficient of the second waveguide core differs from the sign of the thermo-optical coefficient of the second cladding, for example, one positive and one negative. The aforementioned optical paths can be implemented in a Mach-Zehnder interferometer (MZI).

The application discloses a modulation-insensitive dual-mode waveguide optical switch and a preparation method thereof, and belongs to the technical field of planar optical waveguide devices. The switch is composed of a silicon wafer substrate, a polymer lower cladding layer, a polymer optical waveguide core layer and a polymer upper cladding layer from bottom to top, the polymer optical waveguide core layer is covered in the polymer upper cladding layer, and the refractive index of the polymer optical waveguide core layer is higher than that of the polymer upper cladding layer and the polymer lower cladding layer. The application utilizes the advantages of simple asymmetric directional coupling structure and asymmetric Y branch structure and the large thermal-optical coefficient of organic polymer materials, and realizes the modulation-insensitive switch of two signal optical modes through mode conversion by using the asymmetric Y branch when the heating electrode is modulated. The preparation process of the application is simple, only needs spin coating, photoetching and wet etching, effectively reduces the production cost, improves the production efficiency of the device, is favorable for large-scale batch production, and enables the mode signal optical switch to be applied to actual use.

The present invention provides a thermo-optic phase shifter array including at least one first waveguide and at least one second waveguide, wherein the first waveguide extends along a first direction, the second waveguide extends along a second direction, the first waveguide and the second waveguide are alternately arranged in a third direction, the first waveguide includes a first waveguide segment, the second waveguide includes a second waveguide segment, the first waveguide segment and the second waveguide segment are alternately arranged in the third direction, the first waveguide segment is integrated with a heater, and the thermo-optic coefficient of the second waveguide segment is smaller than the thermo-optic coefficient of the first waveguide segment. The thermo-optic phase shifter array provided by the present invention has lower thermal crosstalk and a compact structure, which is conducive to high-density integration. The present invention also provides an interferometer array and an optical phased array.

Provided in the present application are a rare-earth-doped optical fiber having an adjustable thermo-optical coefficient, and a preparation method therefor and the use thereof. The optical fiber comprises a fiber core and a cladding, wherein the fiber core comprises the following components in molar percentages: 80-95 mol% of SiO2, 0.1-0.3 mol% of a rare earth oxide Re2O3, 0.5-10 mol% of P2O5, 0.5-10 mol% of Al2O3, 0.1-10 mol% of SiF4, and 0.1-10 mol% of a first alkali metal oxide R2O; and the cladding comprises the following components in molar percentages: 95-100 mol% of SiO2, 0.1-5 mol% of GeO2, 0.1-10 mol% of SiF4, 0.1-5 mol% of a second alkali metal oxide R2O and 0.1-5 mol% of Fe2O3. According to the rare-earth-doped optical fiber having an adjustable thermo-optical coefficient of the present application, by means of the components having different effects, the thermo-optical coefficient of the fiber core and the cladding layer is adjusted, and the loss of the cladding in a specific wave band is adjusted; and after the rare-earth-doped optical fiber is applied to an optical fiber laser, the working stability and the output power of the laser can be improved.

A laser amplifier head including plates of a laser active medium which are placed inside a housing which has an inlet port and an outlet port. A cooler includes a cooling circuit connected to the housing and suited to the circulation of a cooling liquid, a cooling duct, inside the housing, in contact with the active medium, in which the cooling liquid flows, allowing an exchange of heat between the latter and the plates, and a regulator able to regulate a temperature of the cooling liquid such that a thermo-optical coefficientdndTof the cooling liquid satisfies the following condition:<semantics definitionURL="">❘<annotation encoding="Mathematica">"\[LeftBracketingBar]"< / annotation>< / semantics>d⁢nd⁢T<semantics definitionURL="">❘<annotation encoding="Mathematica">"\[RightBracketingBar]"< / annotation>< / semantics><6⁢λ0Δ⁢T*∑φH⁢(I)where ΔT represents the difference in temperature between the cooling liquid and the plates of the active medium, ΣφH represents the sum of the hydraulic diameters of the cooling duct and λ0 represents the wavelength of the beam in a vacuum.

The invention discloses a nano-bubble optical coefficient measurement method based on a multilayer spherical shell Mie theory, relates to the technical field of nano-bubble and nano-particle optical property measurement, and aims to solve the problem that an existing method cannot measure the optical property of a nano-bubble, the energy of laser absorbed by nano-particles is obtained according to the change of the transmission light intensity of the nano-particles, and the optical coefficient of the nano-bubble is measured according to the change of the transmission light intensity of the nano-particles. And substituting the refractive index field into an energy equation, obtaining the temperature and density in the nano-bubble forming process through a lattice Boltzmann method, and further obtaining the optical coefficient of the nano-particles wrapped by the nano-bubbles based on the multilayer spherical shell Mie theory according to the change condition of the refractive index field along with the degree.

The invention relates to chalcogenide glass with a low thermo-optical coefficient as well as a preparation method and application of the chalcogenide glass. The chalcogenide glass with the low thermo-optical coefficient is prepared from the following components in percentage by weight: 78 to 84 percent of Se; 12%-20% of Ge; and 4%-8% of As. Through specific component design, the thermo-optical coefficient is reduced, and the influence of temperature on the optical system is reduced, so that the wavefront distortion control precision of the optical system in an extreme temperature environment is ensured.

The present invention relates to the field of optical waveguide manufacturing technology, specifically disclosing an optical waveguide, a manufacturing method thereof, and an optical waveguide spot adapter. The optical waveguide is manufactured using silicon oxycarbide with a refractive index ranging from 1.457 to 2.7 (inclusive), exhibiting low transmission loss and a good thermo-optical coefficient. The optical waveguide is suitable for optical waveguide devices of various sizes and can be used for optoelectronic monolithic and hybrid integration. Furthermore, the optical waveguide can achieve single-mode transmission even with a large refractive index difference between the core and cladding, resulting in lower loss compared to standard single-mode fiber coupling. Furthermore, the provided optical waveguide manufacturing method utilizes a low process temperature during the manufacturing process, eliminating the need for high-temperature annealing and being compatible with IC manufacturing processes.

The present invention provides a rare earth-doped optical fiber for suppressing mode instability effects and a preparation method thereof, and relates to the technical field of special optical fiber preparation. The preparation method first deposits a channel region with a low refractive index in a quartz tube, and then sequentially prepares a core passive region and a core active region with different doping components to achieve different thermo-optic coefficients in the local region of the core. The present invention reduces the thermo-optic coefficient of the optical fiber and weakens the nonlinear inter-mode coupling effect by introducing a negative thermo-optic coefficient material, thereby effectively suppressing MI; at the same time, the method of rare earth ion center doping is adopted to reduce the high-order mode gain in the case of a large core, and then suppress the generation of high-order modes through a mode competition mechanism, thereby increasing the proportion of the fundamental mode; the low numerical aperture and channel structure design enable the optical fiber to have a higher high-order mode loss, suppress the fundamental mode-high-order mode coupling effect, further increase the MI threshold, and improve the beam quality.

This invention discloses an ultra-low residual amplitude modulation waveguide-optical phase modulator, comprising a first electrode layer and a second electrode layer parallel to each other. An α-phase waveguide channel and a substrate layer are disposed between the first and second electrode layers. The optical axes of the α-phase waveguide channel and the substrate layer are both perpendicular to the plane of the first electrode layer. The difference between the thermo-optical coefficient of the α-phase waveguide channel and the thermo-optical coefficient of the substrate layer is less than a preset thermo-optical coefficient difference threshold. Part of the side of the α-phase waveguide channel is covered by the substrate layer. The electric field between the first and second electrode layers uniformly covers the entire α-phase waveguide channel and the substrate layer. The two ends of the α-phase waveguide channel serve as the input and output ends of the light beam, respectively. This invention, by changing the electric field application method and thermo-optical coefficient matching, fundamentally maintains the consistency of the interference phase, thereby significantly reducing the sensitivity of RAM signals to voltage and ambient temperature fluctuations.

The embodiment of the invention provides a chromophore compound, a preparation method of the chromophore compound, an organic electro-optical material and application of the organic electro-optical material, and relates to the technical field of materials. The chromophore compound comprises a conjugate bridge, and a receptor and a donor which are respectively connected to two ends of the conjugate bridge through chemical bonds, the donor comprises aniline and a derivative structure thereof, and the aniline and the derivative structure thereof comprise silyl ether groups. By introducing the silyl ether group into the donor, the chemical stability and thermal stability of the chromophore compound can be improved. Meanwhile, when the chromophore compound is applied to the organic electro-optical material, the organic electro-optical material can have low dipole moment, and the nonlinear optical performance of the organic electro-optical material is improved. Furthermore, the donor in the chromophore compound has strong electron donating ability and can be cooperated with the receptor, and the beta value of the chromophore compound can be effectively improved, so that the organic electro-optical material can generate a larger electro-optical coefficient subsequently.

The present invention provides a thermal compensation birefringent filter and an imaging device. The thermal compensation birefringent filter adopts a four-stage series interference polarization unit design, with the third and fourth stage interference polarization units placed in the middle, and the first and second stage interference polarization units placed on both sides. Each interference polarization unit is based on the principle of interference polarization and is based on two birefringent crystals with different refractive index temperature coefficients. The phase difference change caused by temperature change is compensated by the reasonable placement of the optical axis. The birefringence of crystals of different materials is different, and the thermo-optical coefficient is also different. The problem of spectral line drift caused by temperature change is solved, so that the working wavelength is always stable at 656.3nm (i.e., the Hα line of the sun), and the fluctuation range of the central wavelength of the spectral line does not exceed 0.002nm. The thermal compensation birefringent filter designed by the present invention has no electrical control, temperature control and mechanical devices in the system, which can reduce the physical size of the instrument and improve the stability of the instrument.

The present invention relates to the field of damage detection technology, and discloses a damage detection method and system for a screen protective film. The method comprises: performing laser interference thickness scanning on the screen protective film to obtain three-dimensional thickness distribution data and thickness gradient vector field data; performing multi-layer polarization interference detection on a circularly polarized light beam based on the three-dimensional thickness distribution data to obtain polarization phase difference distribution data; performing non-periodic phase de-envelopment processing on the polarization phase difference distribution data according to the thickness gradient vector field data to obtain continuous polarization phase distribution data; performing stress optical coefficient tensor calculation and dynamic elliptical polarization modulation based on the continuous polarization phase distribution data to obtain stress damage spatial positioning data; and performing damage imaging reconstruction on the edge cutting area and the central bending area of ​​the screen protective film to obtain three-dimensional stress damage imaging results. The present invention realizes full-chain detection from geometric thickness change to stress distribution to damage positioning.

The present invention discloses a push-pull type bis(dialkoxythienyl)ethylene chromophore compound and a composite material, a film and an optoelectronic integrated device containing the same. The chromophore compound uses N,N-dialkylaminobenzene as a π-electron donor, bis(dialkoxythienyl)ethylene as a conjugated bridge, and tricyanofuran (TCF) derivatives, dicyanothiazole, dicyanoindanone or tricyanophthalamide with different electron-withdrawing abilities as π-electron acceptors. The band gap of the chromophore is adjusted by adjusting the electron-withdrawing ability of the π-electron acceptor; when CF3-TCF is used as the π-electron acceptor, the band gap of the chromophore is the smallest and the electro-optic coefficient is the highest. At an operating wavelength of 1304nm, BTVCF3TCF shows an optimal electro-optic coefficient with a number concentration of 1.0×10 20 mL ‑1 The electro-optic coefficient is 59.8pm / V, which is about twice the 30pm / V of the commercial inorganic electro-optic crystal lithium niobate.

The invention provides a gradient doped ferroelectric film device and a preparation method thereof, and relates to the technical field of optoelectronic devices. The gradient doped ferroelectric thin film device comprises a substrate, a buried oxide layer, a buffer layer and a ferroelectric thin film material layer which are sequentially stacked from bottom to top, impurity ions are doped in the ferroelectric film material layer, and the doping concentration of the impurity ions is sequentially increased from bottom to top. By adopting the gradient doping design increasing from bottom to top, the interface defect and the internal stress of the ferroelectric film are optimized, the problem of lattice mismatch between a common ferroelectric film and the substrate layer is solved, the crystal quality is improved, the electro-optical coefficient is enhanced, and the electro-optical effect is effectively improved.

The invention discloses a loading type electro-optical modulator based on high-performance ferroelectric single crystal PIN-PMN-PT and a preparation method of the loading type electro-optical modulator, the electro-optical modulator comprises a PIN-PMN-PT substrate, a straight waveguide layer covers a middle area on the PIN-PMN-PT substrate, upper cladding layers cover the PIN-PMN-PT substrate and the straight waveguide layer, and lower cladding layers cover the upper cladding layers. Modulation electrodes which are located on the two sides of the straight waveguide layer and are parallel to the long edge of the straight waveguide layer are arranged on the upper cladding, and the modulation electrodes are rectangular traveling wave electrodes; a PIN-PMN-PT single crystal with a high linear electro-optical coefficient and an amorphous silicon material are adopted to prepare the novel loading type electro-optical modulator, and an external electric field is applied to the modulator, so that the change of an optical carrier phase is realized, the effect of modulating an optical wave is achieved, and the technical problems that an existing electro-optical modulator is relatively high in driving voltage and high in integration difficulty are solved; according to the loading type electro-optical modulator prepared by the invention, the driving voltage of the electro-optical modulator can be reduced, the modulation efficiency is improved, the modulation length is shortened, and miniaturization and low power consumption are realized.

Aluminoborosilicate glass compositions, products comprising the same, methods of making the same, and methods of using the same are provided. Such glass compositions include oxides of alkaline earth metals. The glass compositions include a low concentration of boron oxide and strontium oxide. Such glass compositions may be substantially alkali-free. The glass compositions exhibit desirable physical and chemical properties, for example, high annealing point, high elastic modulus, low stress optical coefficient (SOC), low T(35kP) and T(200P), and desirable liquidus viscosity. The glass compositions are suitable for use as substrates in flat panel display devices such as active matrix liquid crystal displays (AMLCDs) with ultra-high resolution.

The invention provides a chiral coupling ytterbium-doped optical fiber and a high-power optical fiber laser, and relates to the technical field of optical fibers. The ytterbium-doped optical fiber sequentially comprises a central fiber core, a plurality of spiral side cores, an inner cladding and an outer cladding from inside to outside, wherein the spiral side cores are spirally wound on the central fiber core along the axial direction of the central fiber core; wherein the basic mode refractive index of at least one spiral side core in the multiple spiral side cores is different from the refractive index of the central fiber core in a preset high-order mode, and the thermo-optical coefficient of the spiral side core with the refractive index different from the refractive index of the central fiber core in the preset high-order mode is larger than that of the central fiber core. The chiral coupling ytterbium-doped optical fiber provided by the invention can effectively remove a high-order mode in the central fiber core.

The invention provides a superlattice electro-optical thin film material and a composite film layer and an electro-optical component comprising the same. The superlattice electro-optical thin film material is composed of dielectric material layers and barium titanate layers which grow periodically and alternately, in each period, each barium titanate layer is provided with m unit cell layers, each dielectric material layer is provided with n unit cell layers, m is in the range of 5-50, and n is in the range of 1-20; wherein the material for the dielectric material layer is selected from scandate or strontium tantalum lanthanum aluminate. The electro-optical composite film layer based on the barium titanate superlattice structure solves the problem that the electro-optical performance of traditional barium titanate is degraded, and the electro-optical coefficient of the barium titanate film approaches or even exceeds the level of block barium titanate.

The present application relates to a kind of unidirectional glass fiber reinforced polymer stress optical coefficient detection methods based on terahertz time-domain spectroscopy, comprising: S1, preparation of unidirectional glass fiber reinforced polymer under different curing temperature, in preparation process, respectively along fiber direction and perpendicular fiber direction embedding fiber Bragg grating;Obtain the residual strain of unidirectional glass fiber reinforced polymer along fiber direction and perpendicular fiber direction e x 、 e y , and then calculate the residual stress of along fiber direction and perpendicular fiber direction s x 、 s y ;S2, based on transmission terahertz time-domain spectroscopy system, obtain the refractive index of unidirectional glass fiber reinforced polymer along fiber direction and perpendicular fiber direction n x 、 n y ;S3, establish the propagation model of terahertz wave in different stress state of unidirectional glass fiber reinforced polymer;Combined s x 、 s s y 、 n x 、 n y , calculate the stress optical coefficient of unidirectional glass fiber reinforced polymer.This method is conducive to accurately detecting the stress optical coefficient of unidirectional glass fiber reinforced polymer.