499 results about "Coupling efficiency" patented technology

The invention relates to an optical fiber implantation monitoring method and device for composite material pressure-bearing equipment, and belongs to the technical field of composite material structure monitoring and intelligent sensing. According to the method, a distributed or point type optical fiber sensor and a composite material are synchronously integrated by designing a winding process, so that state parameters such as strain, temperature, pressure and the like of a key area of equipment are monitored in real time. The stability and the precision of the optical fiber in the laying process are ensured by adopting tool structures such as an embedded guide rail and an intelligent pay-off device; the tolerance and the coupling efficiency of the optical fiber are improved by combining the multi-layer structure design of the optical fiber flexible coating glue, the elastic coupling layer and the like; fBG, Brillouin and Raman sensing are fused through a temperature-stress cooperative monitoring system, and high-precision multi-physical field sensing is achieved. The system has the advantages of high integration level, low transformation cost and excellent monitoring performance, and is suitable for on-line health monitoring and intelligent early warning of composite material pressure-bearing equipment such as low-temperature high-pressure hydrogen storage cylinders, carbon fiber V-shaped cylinders and composite material pressure pipelines.

The invention relates to the technical field of optical module coupling, and discloses optical module product double-Lens coupling equipment and a coupling method thereof.The coupling equipment comprises a jig module, a stock bin streamline module, a carrying module and two coupling modules arranged on the left side and the right side of the jig module, and the two coupling modules can be coupled with two Lens on an optical module product at the same time; an optical module clamping jaw of the carrying module can rotate around a Z axis, so that the direction of an optical module product reversely placed in a Tray can be corrected, and the coupling efficiency and quality of the optical module product are improved; in the coupling method, the stock bin streamline module can automatically provide and collect the Tray carrying the optical module product, and the carrying module can carry the optical module product between the stock bin streamline module and the jig module in a reciprocating manner, so that the coupling module can realize the coupling of the Lens and the optical module product, that is, the coupling method can coordinate the cooperation among the modules of the coupling equipment, and the coupling efficiency is improved. Therefore, the coupling logic is rigorous and orderly, and stable operation of the equipment is ensured.

The invention discloses a multi-channel runway micro-ring modulator capable of adjusting coupling efficiency, and the modulator comprises a runway micro-ring resonant cavity which comprises a straight waveguide section and a bent section and is used for achieving the resonance of an optical signal; the Mach-Zehnder modulation structure is integrated with the micro-ring resonant cavity and is used for adjusting the equivalent coupling coefficient of the micro-ring and the main waveguide; wherein the Mach-Zehnder modulation structure comprises a coupler, a mode converter and a modulation arm. And the modulator is also provided with a heater. According to the scheme, the coupling coefficient of the micro-ring resonant cavity and the main waveguide is adjusted through the Mach-Zehnder modulation structure, the limitation of the photon lifetime of the micro-ring resonant cavity on the modulation rate is overcome, and the restrictive relationship between the bandwidth and the modulation efficiency is broken. Compared with an existing micro-ring modulator, the micro-ring modulator can still have the high-speed modulation capacity in a high-quality-factor micro-ring resonant cavity. Meanwhile, through the design of the waveguide in the Mach-Zehnder interference region, the length of the modulation region is increased while the area of the device is not increased.

The invention discloses a laser-assisted helium arc penetration fusion welding method, and belongs to the technical field of welding. The problems that according to an existing paraxial laser-electric arc composite structure, the welding track is difficult to control, the energy coupling efficiency is low due to laser energy loss, and weld joint partial melting and undercut defects are caused due to uneven distribution of a welding temperature field due to a generated asymmetric heat source are solved. The welding method comprises the steps of 1, pretreatment; 2, after being focused by a focus lens, the laser is divided into three laser beams through a spectroscope, then the three laser beams are converged again through a plurality of reflectors, three fan-shaped light spots are formed on the surface of the to-be-welded plate after convergence, and finally the focal plane position of the laser is adjusted to be located on the surface of the to-be-welded plate; 3, setting welding current and arc voltage; and fourthly, laser is used for assisting helium arc penetration fusion welding. The method is used for laser-assisted helium arc penetration fusion welding.

The invention provides double-lens coupling equipment and a double-lens coupling method, and belongs to the technical field of laser device production, the double-lens coupling equipment comprises a device tool, a lens tool, two coupling mechanisms and a detection mechanism, the lens tool is provided with two lens material waiting areas at the same time, the two lens material waiting areas can be used for placing a fast-axis collimating lens and a slow-axis collimating lens respectively, and the two lens material waiting areas can be used for placing the fast-axis collimating lens and the slow-axis collimating lens respectively; the two coupling mechanisms are arranged at the same time, coupling of one lens can be conducted through each coupling mechanism, during operation, the two coupling mechanisms conduct coupling of the fast axis collimating mirror and the slow axis collimating mirror respectively, light beam detection is conducted through the detection mechanism, and the coupling precision is ensured. Therefore, the double-lens coupling device can execute coupling of the two lenses at the same time, and the coupling efficiency is improved.

The invention relates to the technical field of spectrum detection, and particularly discloses a preparation method of a microstructure enhanced optical fiber and a Raman spectrometer light collection system thereof, the system comprises: a light source assembly for generating laser and performing collimation treatment on the laser to make the collimated laser irradiate a to-be-detected sample; the detection area assembly is used for placing a to-be-detected sample and positioning the to-be-detected sample; the collection assembly is used for collecting Raman scattering light generated by the sample to be detected under laser irradiation based on the microstructure enhanced optical fiber, and the optical fiber end face of the microstructure enhanced optical fiber is provided with a micro-nano structure; the geometric parameters of the micro-nano structure are determined by global optimization by using the genetic algorithm to maximize the coupling efficiency of the unpolarized diffused light in a preset wavelength range as an optimization target; and the control analysis assembly is used for carrying out signal acquisition from the collected Raman scattering light and identifying component information corresponding to the to-be-detected sample through a preset component identification model based on a signal acquisition result.

The invention relates to the technical field of spot-size converters, and discloses a lithium niobate film spot-size converter with an asymmetric trident structure and a preparation method of the lithium niobate film spot-size converter with the asymmetric trident structure. The lithium niobate film waveguide layer is positioned on the insulating layer; the silicon dioxide layer is coated on the lithium niobate film waveguide layer; the silicon nitride waveguide layer is located on the silicon dioxide layer; the silicon nitride waveguide layer comprises a first waveguide part, a second waveguide part and a third waveguide part which are connected in sequence in the direction from the input end to the output end of the lithium niobate film spot size converter, and the first waveguide part, the second waveguide part and the third waveguide part are located on the same plane; in the light wave transmission direction, the transverse size of the second waveguide part is sequentially increased, and the transverse size of the third waveguide part is sequentially reduced; according to the invention, the process preparation difficulty is low, high-efficiency coupling with the coupling efficiency of more than 90% from the silicon nitride waveguide to the lithium niobate waveguide can be realized, and the optical fiber coupling alignment tolerance and overlay tolerance as well as the overall coupling efficiency of the spot size converter are improved.

The application provides a MEMS resonator and a MEMS resonator array. The MEMS resonator comprises a vibration unit, a coupling energy storage unit, an anchor point and a first electrode. The vibration unit is used for generating resonance. The coupling energy storage unit is coupled with the vibration unit and is a high-Q vibration mode. The anchor point fixes the coupling energy storage unit on a substrate. The first electrode is arranged adjacent to the vibration unit and has a gap between the vibration unit. The application sets the coupling energy storage unit in the MEMS resonator. On the one hand, the coupling energy storage unit is equivalent to introducing other high-Q bulk mode vibration structures on the basis of the existing vibration unit, so as to improve the resonance Q value of the whole MEMS resonator. On the other hand, the coupling energy storage unit is coupled with the vibration unit, the coupling area is increased, the coupling efficiency is improved, and the resonance Q value is further improved. In addition, the coupling area of the coupling energy storage unit and the vibration unit can be increased, which is also beneficial to improve the coupling efficiency.

The invention discloses a surface emitting laser which solves the problems that a laser is poor in single-mode working stability and high in preparation process difficulty. The surface emitting laser comprises a substrate and an epitaxial structure which are arranged in a stacked mode, the epitaxial structure is provided with a plurality of holes, the section of each hole is roughly in a T shape, the sections are parallel to the substrate, filler is arranged in the holes, and the refractive index of the filler is different from that of the epitaxial structure. Under the same mode field area and surface emission coupling efficiency, the threshold gain difference between the base mode and the high-order resonance mode of the laser is large, and the stability of the single-mode working state is high. And the hole machining difficulty of the T-shaped structure is low.

The invention provides a topological posture single photon source device and a quantum light source, and relates to the technical field of topological quantum light sources. The topological state single photon source device comprises a GaAs layer; the SiO2 / Au structure comprises a SiO2 layer and an Au layer, and is positioned below the GaAs layer to serve as a reflecting mirror for inhibiting backward photon leakage; the topological state microcavity is processed and formed on the GaAs layer; and the quantum dots grow in the GaAs layer and are coupled with the topological posture of the topological posture microcavity to generate a topological posture single photon source. According to the invention, the coupling efficiency of the quantum dots and the microcavity is effectively improved by using the mode volume with a relatively large topological posture, the bottleneck that the coupling probability is low due to the limited volume of a traditional mode is broken through, and a better scheme is provided for realizing the interaction of high-efficiency light and substances.

The invention provides a heterogeneous integrated sub-wavelength structure end face coupler adaptive to a single-mode optical fiber and a preparation method of the heterogeneous integrated sub-wavelength structure end face coupler, and relates to the technical field of integrated optics. The coupler comprises a substrate, an insulating layer, a waveguide layer and a cladding from bottom to top. The waveguide layer comprises an upper lithium niobate ridge waveguide and a lower lithium niobate ridge waveguide, the lower waveguide is wider than the upper waveguide, and the upper waveguide is used for connecting an external waveguide; the heterogeneous integrated coupling region comprises a silicon nitride strip conical waveguide which forms directional coupling with the lower-layer lithium niobate waveguide, so that adiabatic transfer of a light field is realized; the sub-wavelength grating regulation and control region sequentially comprises a silicon nitride tapered waveguide and sub-wavelength grating combination section, a width gradually-changing grating section and an equal-width buffer grating section. The whole structure is symmetrical about the central axis. Through the multi-section adiabatic transformation and heterogeneous integration design, efficient expansion of a mode field is achieved, the coupling efficiency with a single-mode fiber is improved, and the advantages of being insensitive to polarization, good in process compatibility and suitable for high-density integration are achieved.

The invention provides a coupling system for an on-chip light source and a photon chip. The coupling system comprises an input light source, a collimating lens, a focusing lens, a reflecting prism and an on-chip grating which are sequentially arranged in the direction of a light path, and an optical waveguide located on the side face of the on-chip grating. The collimating lens is used for primarily shaping emergent light of an input light source into a collimated light beam, the focusing lens is used for focusing the collimated light beam to the on-chip grating, and the collimating lens and the focusing lens are both aspheric plano-convex lenses. According to the system, non-uniformity caused by a large divergence angle of the semiconductor laser is effectively corrected through the aspheric micro lens, output of approximately parallel light beams is achieved, the light beams are accurately focused to the photon chip grating through the aspheric focusing lens subsequently, the coupling efficiency of light energy is greatly improved, and compared with two cylindrical lenses in the prior art, the coupling efficiency of light energy is greatly improved. The design of the focusing lens and the reflector is added, so that the number of optical elements is reduced, and error accumulation is reduced.

The invention discloses a polarization sensitive type broadband absorber based on metal-medium stacking, and relates to the technical field of micro-nano photonic devices and infrared detection. The absorber sequentially comprises a bottom-layer high-loss metal reflecting layer, a multi-layer stacked composite dielectric cavity structure and a top-layer sub-wavelength metal grating from bottom to top, according to impedance matching and interference resonance theories, a broadband absorption substrate is constructed through a multi-layer film structure at the bottom, and light energy is converted into heat energy by utilizing the high loss characteristic of bottom layer metal; plasmon resonance is excited through the top metal grating, the coupling efficiency of TM polarized light is enhanced, and TE polarized light is cut off; the above structural design successfully realizes efficient broadband absorption and high polarization extinction ratio in an infrared band. The structure is simple in design, is compatible with a CMOS technology, and has excellent wide-angle stability. And meanwhile, polarization screening can be realized without an external polaroid, and miniaturization and integration of an infrared detection system are facilitated.

The utility model discloses an optical assembly and an optical module, which comprise an optical fiber connector component and a wavelength division multiplexing component, a first optical component is arranged between the optical fiber connector component and the wavelength division multiplexing component, and the first optical component is used for focusing and inputting light beams output by an optical fiber head to the input end of the wavelength division multiplexing component. The output end of the wavelength division multiplexing component is provided with a second optical component used for turning the light beams output by the wavelength division multiplexing component to the receiving end. The coupler has the advantages of being simple in structure, convenient to assemble, high in coupling efficiency, small in loss and high in channel quality.

The invention relates to the technical field of signal detection and acquisition. The invention provides a pulse signal acquisition device based on a solid-liquid coupling structure. The pulse signal acquisition device comprises a shell, a flexible film and a pressure sensor, the shell is of a hollow structure, and an opening is formed in the lower end of the shell; the flexible film is arranged at the lower end of the shell and extends outwards from the opening; the shell and the flexible film form a sealed cavity, and the sealed cavity is filled with a liquid medium; the pressure sensor is arranged at the upper end of the shell and makes contact with the liquid medium. A sensing coupling interface is constructed through the flexible film and the liquid medium, a continuous compliant solid-liquid contact path is formed, and the problems of energy reflection and signal attenuation caused by mismatching of mechanical impedance of a traditional rigid structure sensor are solved. According to the pulse signal acquisition device, impedance natural transition and pressure wave stable conduction between the skin and the sensor are achieved, and the coupling efficiency and acquisition sensitivity of the pulse signal acquisition device are improved.

The invention relates to a terahertz near-field imaging light path calibration device and a terahertz near-field imaging light path calibration method. The device comprises a first visible light source, a second visible light source, a first collimation visible light source, a second collimation visible light source, a first light path collimation system, a second light path collimation system, a light path adjusting system, a circular reflector, a terahertz quantum cascade laser, a thermal detection array, a terahertz quantum well detector and an atomic force microscope platform. The THz laser source and the detector are simulated through the divergent visible light source, the lifting position point of the light path is calculated, light beams can be accurately coupled to the position of the needle point after being focused, errors caused by improper light path adjustment are reduced, meanwhile, the overlapping effect of light spots at the needle point is calibrated through the circular reflector and the thermal detection array, and the detection accuracy is improved. And the thermal detection array is used for observing the convergence effect of THz reflection light spots at the position of the detector, so that the effective focusing and coupling efficiency of THz waves in a near-field region of a probe sample can be improved.

The invention discloses a method for testing the coupling efficiency of a photovoltaic grid-connected energy storage type inverter, and the method comprises the following steps: building a corresponding distributed hardware test topology based on a distributed multi-source cooperation unit, an edge calculation collection terminal, a full-working-condition environment simulation room and a monitoring upper computer; obtaining multi-dimensional original data under different working conditions, performing Kalman denoising and timestamp synchronization processing, and generating a time sequence aligned inverter multi-source test data set; constructing a corresponding inverter basic dimension parameter matrix based on the inverter multi-source test data set, and performing coupling weighting operation and tensor coupling normalization correction calculation to generate a multi-dimension coupling normalization correction weighting coefficient; and obtaining input and output power data of the inverter, carrying out coupling efficiency accounting, and carrying out coupling over-limit secondary correction and testing at the same time, so as to generate a coupling efficiency testing result of the photovoltaic grid-connected energy storage type inverter under the corresponding working condition. According to the invention, the accuracy of testing the coupling efficiency of the inverter can be improved.

The invention relates to the related technical field of silicon photon chips, in particular to a high-speed silicon optical engine method and device for a silicon optical module, and the method comprises the steps: obtaining basic technical parameters of an optical fiber connection product with the silicon optical module; the refractive index distribution and the waveguide section size of the silicon optical waveguide are configured, and a multi-mode waveguide array is constructed; an electro-optical modulator array is integrated in a multi-mode waveguide array, and the coupling efficiency of waveguides and optical fibers is adjusted in real time through dynamic impedance matching; meanwhile, the high-speed electric drive circuit is used for driving the electro-optical modulator array and optimizing rising edge characteristics / falling edge characteristics of signals, and power consumption adjustment is carried out on the high-speed electric drive circuit. The technical problem that the optical signal quality is reduced due to the fact that the silicon optical waveguide design mostly adopts fixed parameters and mode crosstalk is prone to occurring in a high-speed transmission scene is solved, and the technical effects that the waveguide refractive index is dynamically configured, the multi-mode waveguide array is constructed, the mode crosstalk is effectively reduced, the transmission loss is reduced, and the optical signal transmission quality is improved are achieved.

The invention discloses an in-plane heterogeneous photonic crystal quantum cascade laser. The in-plane heterogeneous photonic crystal quantum cascade laser comprises a back metal electrode, a front metal electrode and an epitaxial wafer located between the back metal electrode and the front metal electrode. Wherein a photonic crystal layer is arranged between the epitaxial wafer and the front metal electrode; wherein the photonic crystal layer is composed of first-order photonic crystals, symmetrical bilattices and second-order photonic crystals which are periodically arranged and are sequentially symmetrical from outside to inside. The problems of low modal selectivity, low coupling efficiency and the like of the existing wide ridge emission QCL are solved, and a new thought is provided for researching the large-area QCL with high power and light beam quality.

The invention provides an edge coupling light emitting type 3D optical co-packaging preparation method supporting plastic packaging. The method adopts a 3D stacking scheme that an electric chip is arranged on the upper portion and an optical chip is arranged on the lower portion, and comprises the steps that S1, a plurality of rewiring layers and a micro bonding pad are prepared on the upper portion of the optical chip; s2, enabling the optical chip to be electrically connected with the electric chip through the multi-layer rewiring layer and the micro bonding pad; and S3, leading out signal input and output interfaces of the electric chip, the optical chip and the ASIC / switching chip downwards through silicon through holes in the optical chip, and realizing electric connection with the ASIC / switching chip through a substrate or an adapter plate. According to the invention, plastic package can be supported, the light emitting efficiency of the optical port is not influenced by a plastic package material after RDL and EIC bonding and plastic package processes are manufactured, the adhesion of the plastic package material or PI particles on the optical port during mechanical cutting is relieved, and the coupling efficiency is ensured.

The invention relates to the technical field of coupler design, in particular to a bi-directional coupler applied to a high-frequency RFID (Radio Frequency Identification Device) system, which comprises the following steps: S1, respectively constructing a series transformer, a parallel transformer and a Magic-T structure hybrid network, and forming an impedance self-matching coupler core framework by adopting a plurality of Ni-Zn ferrite double-hole magnetic rings; s2, inputting an original coupling signal output by the coupler core architecture into a phase-amplitude cooperative calibration module to generate a calibrated stable coupling signal; s3, inputting the stable coupling signal into a bridging T-type attenuation network group, respectively performing accurate power adjustment on a forward coupling path and a reverse coupling path, and finally outputting a high-directivity and low-fluctuation coupling signal; s4, monitoring the impedance state of an antenna port in real time, and feeding back and adjusting a matching network structure to realize stable control of the standing-wave ratio in a full frequency band range; according to the invention, the design of an external matching circuit is simplified, the coupling efficiency and directivity are improved, and the method has important engineering value.

The invention relates to the technical field of polysaccharide extraction, and discloses a method for extracting high-purity pectin through cooperation of pulse microwave and low temperature, which comprises the following steps: applying a microsecond-level microwave pulse sequence corresponding to inherent acoustic resonant frequency of raw material particles, and monitoring net absorption power and acoustic signals on line, so as to adaptively control frequency locking and pulse form in a closed-loop manner; according to the invention, the electromagnetic energy of microwaves is converted into instantaneous mechanical work, and efficient structural damage to the plant cell walls from inside to outside is realized through a resonant coupling effect on the premise of maintaining the low temperature of the system; the online self-adaptive closed-loop control mechanism ensures the whole-process optimization of the energy coupling efficiency and the process stability, so that the inherent contradiction that the product quality and the extraction efficiency are difficult to consider at the same time in the traditional extraction technology is solved.

The invention provides an III-V group and silicon-based waveguide bonding coupling structure design method and a laser. The method comprises the following steps: determining initial geometric parameters of a coupling region of an III-V group laser and a silicon-based waveguide; determining a maximum process alignment deviation range based on process historical data; establishing a three-dimensional simulation model on the basis of the initial geometric parameters, and performing offset correction on the position of the silicon-based waveguide in the bonding plane according to the maximum process alignment deviation range in a simulation environment; calculating the coupling efficiency after offset correction, and when the reduction of the coupling efficiency exceeds a preset threshold value, carrying out iterative optimization adjustment on the width of the silicon-based waveguide and the length of the transition region; the method comprises the steps that the silicon-based waveguide structure with the optimal coupling efficiency is finely adjusted again according to the maximum process deviation, offset correction and optimization adjustment are repeatedly executed till the coupling efficiency meets the design requirement under all the preset process deviation conditions, and coupling structure design parameters are output. Therefore, the design of the coupling region with robustness to process deviation is obtained.

The present application relates to a capillary array, its manufacturing method, and use. The capillary array includes a plurality of parallel-axially arranged capillaries made of a first glass, each of which has an inner wall provided with a low-refractive-index layer whose refractive index is lower than that of a liquid scintillator, and a light-absorbing layer made of a second glass between any two adjacent capillaries. The capillary array includes a capillary region in which T1 - T2 is 30 to 50°C, where T1 is the softening point of the first glass and T2 is the softening point of the second glass, and the thermal expansion coefficient of the first glass is α1. The capillary region is made of a third glass, which is disposed outside the capillary region and in contact with the outer surface of the capillary region, and has a softening point of T3, where T2 - T3 is 50 to 100°C, and the thermal expansion coefficient of the third glass is α3, where α1 - α3 is 2×10. -7 ~10×10 -7 / °C. The technical problem to be solved by the present application is to manufacture a capillary array such that a liquid scintillator optical fiber panel manufactured using the capillary array has high spatial resolution, high hole diameter uniformity, high numerical aperture, and high coupling efficiency, and the manufacturing process is simple.

The invention relates to the field of semiconductor lasers, in particular to a high-power narrow-linewidth hybrid integrated laser, which comprises a wide waveguide laser gain chip and a silicon-based external cavity photon chip, and is characterized in that the silicon-based external cavity photon chip comprises a tip multi-section edge coupler, a bus waveguide, at least three cascaded micro-ring resonators and a feedback assembly; the tip multi-section edge coupler comprises a tip waveguide array and a conical combined waveguide, the tip waveguide array is composed of inverted conical waveguides arranged side by side, and the width of the input end face of each inverted conical waveguide is smaller than that of the output end face of each inverted conical waveguide; and the width of the conical combined waveguide is gradually reduced from the input end to the output end. The invention solves the industrial problem that high power and narrow linewidth are difficult to consider in the hybrid integrated laser, has the advantages of high output power, extremely narrow linewidth, wide tuning range, high coupling efficiency, good process tolerance, high integration level and the like, and provides a high-performance light source for the next generation of coherent optical communication, laser radar and precision measurement system.

The invention discloses a satellite-ground laser communication atmospheric channel compensation system and method. Relates to the technical field of satellite-ground laser communication, in particular to a satellite-ground laser communication atmospheric channel compensation system and method. Through structural coupling and parameter matching, deep collaboration of the multimode fiber and the MPLC is realized, and the optical signal coupling efficiency in the turbulent environment is remarkably improved on the premise of reducing the complexity, power consumption and cost of the system. In the system, a receiving module captures and focuses a multi-mode optical signal emitted by a satellite to a transmission connection module through a coupling lens group; the transmission connection module receives and transmits the multi-mode optical signal to the multi-mode input end of the MPLC through the fiber core of the multi-mode optical fiber; and the modal screening module decomposes a multi-modal optical signal received by the multi-modal input end of the MPLC through the MPLC optical mode demultiplexing module to obtain a plurality of modal fundamental modes, and outputs the fundamental modes through the MPLC single-mode output end.

The application discloses an implementation device and method of a controllable nonreciprocal circuit, and the device comprises a vector network analyzer, a left coupling capacitor, a right coupling capacitor and a nonlinear LC resonant cavity, wherein the resonant frequency of the nonlinear LC resonant cavity is jointly regulated by a direct current bias voltage loaded on a varactor diode and a microwave signal. The application utilizes the difference in coupling efficiency of microwave energy coupled into the nonlinear LC resonant cavity when the microwave signal is transmitted forward and reversely, and utilizes the regulation of the direct current bias voltage on the nonlinear interaction between the microwave signal and the LC resonant cavity mode in the nonlinear LC resonant cavity, so that the nonlinear LC resonant cavity can be in different bistable states when the microwave signal is transmitted forward and reversely, and thus the controllable nonreciprocal transmission with high contrast can be realized for the microwave signal in a larger working bandwidth.

The invention discloses a double-layer optical waveguide coupling type pressure sensor, which comprises a detection optical signal generation module, a pressure sensing unit and a detection signal processing module, and is characterized in that the detection optical signal generation module and the detection signal processing module are connected with the pressure sensing unit through optical fibers; the pressure sensing unit mainly comprises two layers of flat plates containing optical waveguides, and air or low-loss transparent liquid with a certain thickness clamped between the flat plates to form a pressure sensing structure, when the upper-layer waveguide deforms due to external pressure, the distance between the upper-layer waveguide and the lower-layer waveguide and the coupling efficiency are changed, the output optical power of each optical waveguide is changed, and the output optical power of each optical waveguide is changed. Therefore, the pressure on the chip can be detected. According to the invention, high-precision sensing can be realized, and compared with a traditional electric pressure detection method, the method has the advantages of resisting electromagnetic interference, supporting sensing and transmission integration and high-speed dynamic sensing, and being suitable for dangerous occasions such as a complex electromagnetic environment and the like; compared with a wavelength resolution type optical pressure sensor, the optical pressure sensor has the advantages of wide spectrum, simple preparation process and high cost performance.

The utility model provides a multichannel wavelength division multiplexing device and optical module, including: an optical port pin, a base, a cushion block, a light splitting assembly, an array lens and an array detector, the cushion block and the array detector are both arranged on the base, the optical port pin, the light splitting assembly and the array lens are all arranged on the cushion block, the light splitting assembly is arranged on the cushion block, and the array lens is arranged on the base. The optical port pin, the light splitting assembly and the array lens are sequentially coupled along an optical path, and the array lens is coupled with the array detector; the light splitting assembly is used for splitting light signals emitted by the light port pin and coupling multiple paths of light signals after light splitting to the array lens, and the array lens is used for focusing the multiple paths of light signals to the array detector; the light splitting assembly and the array lens are integrated on the cushion block for common passive mounting, active coupling between the lens and the detector does not need to be carried out, and the overall coupling efficiency is improved.

The application discloses a kind of parallel coupling self-imaging external cavity coherent array semiconductor laser, comprising: semiconductor laser chip array, light transmission dielectric layer and external cavity reflection layer;Semiconductor laser chip array includes multiple light emitting units, light transmission dielectric layer and external cavity reflection layer form laser self-imaging external cavity;The non-light emitting area of semiconductor laser chip array light emitting surface is coated with high reflection film, and the feedback light that cannot be injected into the light emitting unit due to incomplete self-imaging at the edge of semiconductor laser chip array can oscillate in self-imaging external cavity multiple times to reform the self-imaging that can be completely injected into the light emitting unit.The application improves the injection of laser outside the light emitting area, can efficiently parallel coupling all light emitting units including edge in chip array, eliminate the edge effect of chip array generated by self-imaging external cavity feedback, enhance the feedback efficiency of self-imaging external cavity, obtain the coherent array laser output of high parallel coupling efficiency, high efficiency optical mutual injection.