147results about How to "Efficient coupling" patented technology

A chip package includes a housing, one or more electrical connections coupled to an exterior of the housing, a photonic integrated circuit, and a scanning unit. Both the photonic integrated circuit and the scanning unit are disposed within the housing. The photonic integrated circuit has at least one waveguide designed to guide a beam of light. The scanning unit is designed to laterally scan the beam of light across a focal plane outside of the housing. The scanning unit is aligned with the photonic integrated circuit such that the beam of light is coupled between the photonic integrated circuit and the scanning unit.

The invention discloses a micro-grid park integrated energy system planning method and device, a terminal and a medium. The method comprises the following steps: acquiring energy demand data, time-of-use electricity price information, natural gas price and meteorological information of a park to be planned, and equipment parameters, equipment investment cost and equipment maintenance cost in an integrated energy system of the park to be planned; the influence of temperature change on thermodynamic characteristics of steam is considered, and equivalent energy storage of a steam heat accumulator of the microgrid park is modeled by considering valley electricity heat storage; setting constraint conditions of a planning model according to the acquired data information, and taking the minimum comprehensive cost as an objective function, thereby constructing a cold-hot electro-optical storage and charging integrated microgrid park planning model considering electric power-steam multi-energy complementation; and solving the planning model, and outputting a planning scheme about whether each device in the integrated energy system is configured, the configuration capacity and the operation output curve of each configured device. According to the invention, the energy structure of the park is optimized, the resource utilization efficiency is improved, and the stability of the system is enhanced.

The invention discloses an end-to-end automatic driving decision planning model and device combining a vectorized map and multi-task feature embedding. The end-to-end automatic driving decision planning model comprises six task branches of different modules such as perception, decision and control. An end-to-end automatic driving framework is utilized to reduce errors between different model transmissions, and a multi-task constraint mode is utilized to improve the fitting ability of the model. Vectorized map and aerial view target detection are combined to serve as perception representation of a multi-task model, dynamic and static target information needed in aerial view space is provided, environment perception information and decision navigation point output are unified to the same space, and model prediction precision is improved. Information transmission is performed by using a cross attention mechanism between different tasks, training conflicts caused by simple sharing of feature maps in a traditional multi-task model are overcome, efficient coupling between different tasks is realized, and model prediction precision is improved.

The utility model relates to the technical field of optical fiber communication, in particular to a multi-core optical fiber fan-in and fan-out device based on a multi-core optical fiber and a PLC (Programmable Logic Controller) technology, which comprises a PLC chip, a first array substrate and a second array substrate, and is characterized in that the first array substrate and the second array substrate are respectively positioned on two sides of the PLC chip; a multi-core optical fiber is arranged on the first array substrate, a plurality of single-core optical fibers are arranged on the second array substrate, the multi-core optical fiber is coupled with the input end of the PLC chip, and the single-core optical fibers are coupled with the output end of the PLC chip; wherein the number of fiber cores of the multi-core optical fiber is the same as that of the single-core optical fibers; the PLC chip is provided with optical waveguides, and the number of the optical waveguides is equal to the number of fiber cores of the multi-core optical fiber and the number of the single-core optical fibers. The multi-core optical fiber fan-in and fan-out device based on the multi-core optical fiber and the PLC technology is simple in manufacturing process, low in cost and suitable for large-scale production and application.

The invention provides a physically and chemically coupled high-efficiency long-time energy storage system and method.The physically and chemically coupled high-efficiency long-time energy storage system comprises an electrolytic tank hydrogen production system, a Carnot cell energy storage circulation system, a fuel cell power generation system and a Carnot cell energy release circulation system, and the electrolytic tank hydrogen production system is used for converting first electric energy into hydrogen energy to be stored; the Carnot battery energy storage circulating system is used for converting the second electric energy into heat energy and cold energy for storage; the fuel cell power generation system is used for generating third electric energy by utilizing an electrochemical reaction between the hydrogen prepared by the electrolytic tank hydrogen production system and air, realizing conversion from hydrogen energy to the third electric energy, and combusting residual hydrogen tail gas and air tail gas in the electrochemical reaction to release heat so as to generate combustion heat; and the Carnot battery energy release circulation system is used for cooling the energy release first air by using the stored cold energy and then compressing the first air to obtain energy release second air, and heating the energy release fourth air by using the combustion heat and the stored heat energy and then expanding and doing work to generate fourth electric energy so as to realize conversion from the combustion heat, the heat energy and the cold energy to the fourth electric energy. According to the invention, physical and chemical energy storage technologies are coupled, a large-scale long-time energy storage technology of a Carnot cell is taken as a basic load, an electrolytic cell and fuel cell technology is taken as a regulation and control load aiming at source-load side fluctuation, rapid power consumption and supply are realized, and an efficient and flexible long-time energy storage system is created.

The invention discloses an ultrafast heat switching device and a design method thereof. The ultrafast heat switch device comprises a first polariton layer, a fixed near-field gap and a second polariton layer which are sequentially arranged from top to bottom. According to the design method, an external ultrafast light pulse is utilized to excite a first polariton layer, and mid-infrared transient polaritons are generated. Time-varying coupling occurs between the transient polaritons and polaritons of the second polariton layer, opening or closing of a near-field thermal radiation channel is dynamically controlled, and a thermal switch function is realized. Based on the synergistic effect of heterostructure terminal pairing and transient polaritons, the picosecond-level response speed and the switch ratio exceeding four orders of magnitude are achieved. Under the optimal design, the device can achieve the laser cooling effect on the emitting electrode in a single switching period, and an innovative solution is provided for nanoscale dynamic thermal management.

The invention discloses a laser radar zero-blind-area detection system and method based on automatic switching of far and near fields, and solves the problem of low signal receiving efficiency of detection blind areas and far and near fields 100 meters below the ground in the prior art. According to the system, laser emission beams are respectively transmitted along coaxial and off-axis paths through a light splitting module, an aperture diaphragm automatic adjusting device is introduced, a receiving aperture is automatically switched according to far and near field imaging characteristics, and efficient coupling of signals and optimized receiving under a weak light condition are ensured. The system combines far and near field signals to the same optical path by using an automatic beam combination switching device, realizes multichannel signal detection, and supports multifunctional atmospheric parameter monitoring such as aerosol, Raman scattering and the like. The control and data processing system automatically manages signal switching and data processing, operation is simplified, and data reliability is improved. The technology is obviously superior to the prior art in the aspects of detection precision, system integration degree and multifunctional detection capability, and system complexity and cost are reduced.

The invention provides an electrostatic trap ion implantation device and method, the electrostatic trap ion implantation device comprises a power supply and a multi-pole rod, and the power supply applies a radio frequency voltage to the multi-pole rod; the plurality of annular electrodes are arranged on the outer side of the multi-pole rod and are sequentially arranged in the direction parallel to the ion transmission direction in the multi-pole rod; the part on the inner side of the annular electrode enters the area between the adjacent electrode rods; the inlet electrode and the outlet electrode are respectively arranged at an ion inlet and an ion outlet of the multi-pole rod, and the power supply applies voltage to the inlet electrode, the outlet electrode and the annular electrode. The method has the advantages of good ion focusing effect and the like.

The invention provides an ultra-high-speed electric connector which comprises an insulating body, the insulating body is provided with a lengthwise slot, a plurality of terminal slots are formed in lengthwise side walls on the two sides of the slot respectively, and a fool-proof part is arranged in the slot and used for dividing the insulating body into a power supply and low-speed signal area and a high-speed signal area which are located on the two sides of the fool-proof part; the plurality of terminals comprise differential signal terminals distributed in the high-speed signal area and other terminals distributed in the high-speed signal area and the power supply and low-speed signal area, every two differential signal terminals are adjacent, and two sides of every two adjacent differential signal terminals are respectively provided with a grounding terminal; every two adjacent differential signal terminals and two grounding terminals located on the two sides of the two differential signal terminals form a terminal module, and the two differential signal terminals and the two grounding terminals of each terminal module and an insulating block inserted into the insulating body are formed in an embedded mode. The ultra-high-speed electric connector can enable signal transmission to be better and more stable.

The invention relates to a high-efficiency large-scale coupling hydrogen production process and system, an alkaline water electrolysis hydrogen production system, an ammonia water distillation system, an ammonia decomposition system and a hydrogen separation and collection system are coupled, alkaline liquor in the alkaline water electrolysis hydrogen production system is not recycled in an electrolysis system but is directly sent to the ammonia water distillation system, a reactive distillation mode is adopted, and the hydrogen separation and collection system is directly sent to the ammonia decomposition system. The method comprises the following steps of: reacting alkali liquor with fixed ammonium in ammonia water to generate volatile ammonia, carrying out step-by-step steam stripping condensation, sending enriched ammonia-containing non-condensable gas to an ammonia decomposition system for catalytic decomposition to obtain hydrogen-containing process gas, separating and purifying to obtain hydrogen, and finally collecting the hydrogen and hydrogen prepared by water electrolysis to serve as a product hydrogen to be sent to downstream users. Compared with the traditional water electrolysis process for recycling the alkali liquor, the method has the advantages that the influence of impurity ion accumulation and insoluble small particles on the quality of the electrolyte after the alkali liquor is recycled is avoided, the conductivity of the electrolyte is improved, the electrolysis power consumption is reduced, the electrolysis hydrogen production efficiency is improved, and the electrolysis hydrogen production yield is increased.

The invention discloses a non-Hermite singular point photon gyroscope based on a lithium niobate single crystal film. Comprising a wide-spectrum light source, a spot size converter, a polarizer, a gyroscope sensing unit, a photoelectric detector and a lithium niobate film layer which are positioned in a packaging shell, the wide-spectrum light source, the spot size converter, the polarizer, the gyroscope sensing unit and the photoelectric detector are all located on the upper surface of the lithium niobate thin film layer and are sequentially arranged in the light path direction; light emitted by the wide-spectrum light source sequentially passes through the spot size converter, the polarizer and the gyroscope sensing unit and then is received by the photoelectric detector. By means of the electro-optical effect of lithium niobate, the resonant frequency of the micro-cavity is adjusted by applying voltage to keep the gyroscope sensing unit at a singular point in the initial state, and interference of external factors is counteracted; the anti-space-time inversion symmetric structure is constructed, the sensitivity of the gyroscope sensing unit is improved by utilizing the sensitivity of singular points to external perturbation, and the gyroscope sensing unit has the advantages of high sensitivity, small size, high practicability and integratability.

The invention discloses a high-frequency transformer with low-voltage and high-current output. The high-frequency transformer comprises an inner copper bar sleeve, an outer copper bar sleeve and a high-voltage wire bag which are coaxially arranged inside and outside, a cavity extending in the axial lead direction in the inner copper bar sleeve is used for accommodating a transformer magnetic core; the outer copper bar sleeve is arranged on the inner copper bar sleeve in a sleeving manner in the axial lead direction; the high-voltage wire is wrapped between the inner copper bar sleeve and the outer copper bar sleeve and is insulated and isolated from the inner copper bar sleeve and the outer copper bar sleeve respectively; the inner copper bar sleeve and the outer copper bar sleeve are both secondary side coils of the high-frequency transformer. According to the invention, the high-voltage wire is wrapped between the two secondary coils of the inner copper bar sleeve and the outer copper bar sleeve, on one hand, the primary and secondary coils are well coupled, the reduction of the utilization rate of the wire due to the proximity effect under high frequency is reduced, and the power conversion efficiency is improved; on the other hand, the high-frequency high-voltage wire is wrapped by the inner and outer copper bar sleeves, so that radiation interference of high-frequency switch noise to the outside is effectively reduced; in addition, the inner copper bar sleeve and the outer copper bar sleeve have good thermal conductivity, heat dissipation performance and excellent through-current capability.

The invention discloses an optical coupling packaging device, and belongs to the technical field of optoelectronic integration. The optical coupling packaging device comprises an interposer which comprises an optical device, a cavity, a first alignment structure and a first coupling structure, the first alignment structure and the first coupling structure are located in the cavity, and the first coupling structure is connected with the optical device; and the first optical chip is at least partially located in the cavity, the first optical chip comprises a second alignment structure and a second coupling structure, the second alignment structure and the first alignment structure are mutually embedded, and the second coupling structure and the first coupling structure are in coupling connection. According to the invention, high-precision alignment can be realized, the alignment error is reduced, the process complexity is reduced, the cost is reduced, the stability of optical signal transmission is improved, and the optical signal transmission loss is reduced.

The invention discloses a GaN-based photoelectric refractive index sensor integrated with a guided-mode resonant grating and a preparation method of the GaN-based photoelectric refractive index sensor, and relates to the technical field of semiconductor photoelectric sensors. The LED light source comprises a substrate layer, a silicon dioxide bonding layer is formed above the substrate layer, an LED structure and a light detector structure are formed on the upper portion of the silicon dioxide layer, and an electric isolation area is arranged between the LED structure and the light detector structure. The gallium nitride buffer layer and the undoped gallium nitride layer are removed by adopting the inductive coupling plasma etching technology, the n-type gallium nitride layer is further etched and thinned, and finally the grating structure is formed by etching, so that the integration of the thinning process and the grating optimizes the light propagation path, improves the light extraction efficiency, enhances the coupling effect between the light and the medium to be detected, and improves the detection accuracy. In addition, monolithic integration of the light emission function and the light detection function is achieved, a system-level sensor chip can be achieved by combining the driving circuit and the signal processing circuit, and the integration level of the system is improved.

The invention relates to the technical field of DFOS optical fiber sensing, and discloses an FBG optical fiber sensing optical cable for monitoring internal mechanical behaviors of a slope. The FBG optical fiber sensing optical cable for monitoring the internal mechanical behavior of the slope comprises an outer tube, an inner tube and optical fibers, the outer tube sleeves the inner tube, the inner tube wraps three optical fibers adhered by epoxy resin, and the three optical fibers can detect three groups of data, so that the accuracy of the data is enhanced; and an air layer is arranged between the inner tube and the outer tube and is used for buffering the inner tube when external force is applied, and when the external force disappears, the elasticity of the inner tube is recovered, so that the smoothness of the whole FBG optical fiber sensing optical cable is ensured, and the accuracy of monitoring the internal mechanical behavior of the slope is not influenced. According to the FBG optical fiber sensing optical cable for monitoring the internal mechanical behaviors of the side slope, the internal mechanical behaviors of the side slope can be accurately monitored in real time, and a scientific basis is provided for side slope stability evaluation and geological disaster early warning.

The invention relates to the technical field of data coupling, and particularly discloses a multi-modal data coupling system and method based on distributed storage, and the system comprises a longitudinal description and index module, a process control module, a multi-modal data storage channel module and a source database. The longitudinal description and index module is used for acquiring a data coupling demand, converting the data coupling demand into a long-chain knowledge extraction structure of a specific longitudinal demand, and establishing an index relationship between the long-chain knowledge extraction structure and each segmentation word; the flow control module is used for configuring a fusion data index request permission and a fusion data index permission based on the index relationship, and judging whether the index request permission is lower than the index permission to obtain a judgment result; performing corresponding flow and channel configuration based on a judgment result; the multi-modal data storage channel module is used for extracting segmentation words and dividing multi-modal data into different channels for data coupling based on configured channels; the source database is used for storing multi-modal data. Multi-modal data coupling is realized through the modules.

The invention belongs to the technical field of water treatment and wastewater treatment, and provides a microwave synchronous dielectric conduction perforation and electrodeless ultraviolet continuous running water disinfection device and method. The continuous running water disinfection device comprises an electrodeless ultraviolet lamp tube, a microwave source, an air cooling device, a single ridge waveguide, a lampshade and a quartz water pipe; the single-ridge waveguide comprises a single-ridge resonant cavity, the bottom of the single-ridge resonant cavity is provided with a rectangular ridge protruding upwards, and the top of the single-ridge resonant cavity is provided with a strip-shaped gap. The electrodeless ultraviolet lamp tube is arranged along the strip-shaped gap, the quartz water pipe penetrates through the single-ridge resonant cavity, the part, located in the single-ridge resonant cavity, of the quartz water pipe is marked as a disinfection section, and the disinfection section is located above the rectangular ridge and located in the irradiation range of the electrodeless ultraviolet lamp tube; the microwave source feeds microwaves into the single-ridge resonant cavity through the coaxial cable via the waveguide coaxial converter and the impedance converter. According to the invention, the electroporation effect of the continuous flowing water body and the collaborative disinfection of ultraviolet rays can be realized, and the water disinfection effect in the prior art is enhanced.

The invention discloses an ocean sound field fluctuation interval prediction method based on a parabolic equation theory. The method comprises the following steps: firstly, acquiring original environment information and determining a marine environment parameter disturbance interval; then, in combination with the disturbance interval of the marine environment parameters, rasterizing the disturbed marine environment region to obtain a region grid set; determining an initial region grid; then, calculating an interval disturbance propagation matrix corresponding to the current area grid according to the environment information of the current area grid; calculating a sound pressure fluctuation interval corresponding to the current area grid by combining the sound pressure fluctuation interval at the previous area grid and the interval disturbance propagation matrix corresponding to the current area grid; and sequentially traversing each area grid in the processing area grid set to obtain a sound pressure fluctuation interval corresponding to each area grid so as to obtain an ocean sound field fluctuation interval. The method provided based on the parabolic equation sound propagation and interval analysis theory can effectively estimate the fluctuation interval of the ocean sound field.

The invention relates to a two-dimensional geometric array waveguide-based head-up display system. The head-up display system based on the two-dimensional geometric array waveguide comprises an image generation unit and at least two one-dimensional array waveguides, each one-dimensional array waveguide is composed of a plurality of sub-prisms, and the inclined surfaces of the sub-prisms are provided with angle selective transmission reflecting films. The system further comprises a Fresnel lens component and a diffractive optical element. The Fresnel lens component is used for compensating aberration introduced by an automobile windshield, and the diffractive optical element is used for expanding the optical expansion amount. According to the technical scheme, a larger display range can be achieved on the premise that the size of the automobile head-up display system is not obviously increased.

The present application provides an optical module, which uses a substrate as an optical platform for carrying devices, and a gasket is arranged on its upper surface, wherein a routing is arranged on the gasket, and a laser chip is fixed on the gasket and electrically connected to the routing. In addition, the gasket is electrically connected to the circuit board, so that the electrical signal from the circuit board can be transmitted to the laser chip, and the optical signal emitted by the laser chip is coupled into the optical fiber adapter through the focusing lens, thereby realizing the light emission function of the optical module; at the same time, the light incident surface of the optical fiber adapter is set as an inclined surface, and the central axis of the optical fiber and the optical axis of the focusing lens have an angle, thereby making the optical axis of the light beam coupled to the optical fiber through the focusing lens parallel or nearly parallel to the axial direction of the optical fiber, so as to realize the high-efficiency coupling of the signal light output by the laser chip into the optical fiber.

The present invention proposes a wet flue gas desulfurization water-saving intelligent regulation control system and method, the control system comprises a wet flue gas desulfurization tower and a flue condenser connected in sequence through a flue gas pipeline, comprises a condensate buffer water tank connected to the bottom of the flue condenser through a condensate pipeline, and also comprises an electric valve, a flow meter, a SO2 detector, a humidity detector, a first thermometer, a second thermometer, and a third thermometer interconnected with a water balance intelligent controller through a signal transmission channel. The present invention realizes the determination and intelligent regulation of the water consumption q1 of the wet flue gas desulfurization tower and the water collection q2 of the flue condenser through efficient coupling of the flue condenser and the wet flue gas desulfurization tower water system, which not only reduces the water consumption of the wet flue gas desulfurization system, but also realizes the self-regulation of the water balance of the wet flue gas desulfurization system and the zero water replenishment of the system according to different needs.

The invention relates to a novel combined coupling FA structure used in an optical communication optical fiber array. Relates to the field of communication product manufacturing. The structure is composed of a fixing structure, an FAU1 structure and an FAU2 structure. The front end of a V groove of the FAU1 structure is lengthened to form an optical fiber for bearing the protruding part of the FAU2 structure. The FAU1 / FAU2 structure and the fixed seat are provided with V-shaped guide grooves at equal intervals; fAU1 and FAU2 are independently assembled and processed, a designed positioning rod is placed in a V-shaped guide groove of a fixed seat, a positioning V-shaped groove of an FAU1 structure is stacked and fixed on the fixed seat according to position requirements, a positioning V-shaped groove of an FAU2 structure is stacked on the fixed seat, the FAU1 structure is lightly pushed to enable a protruding optical fiber part to extend into a bearing table of the FAU2 structure, and the FAU2 structure is fixed on the fixed seat. Relevant coupling performance parameters are confirmed, and dispensing and curing are carried out after requirements are met, so that the coupling process is completed; therefore, efficient, rapid and accurate positioning is achieved.

The application discloses a kind of based on carbon-based modified electrode microbial quantity dynamic evaluation method.The method comprises the following steps: preparing carbon-based modified electrode doped with target microorganism;Carbon-based modified electrode is used as working electrode, and reference electrode and counter electrode constitute three-electrode system, and is placed in the medium containing target microorganism to be measured in the electrochemical scanning of target microorganism, and the electrochemical response signal is collected;The electrochemical response signal is processed, and the characteristic electrochemical parameter of target microorganism metabolite is obtained;According to the preset detection time threshold selection model: when detection time is less than or equal to preset duration, linear model is used;When detection time is greater than preset duration, dynamic metabolism model is used;Characteristic electrochemical parameter is substituted into the selected model, and the number of microorganisms in the medium to be measured is calculated.The application can realize accurate quantification, anti-interference detection and rapid dynamic evaluation of the number of microorganisms, and significantly improve detection efficiency and accuracy.

The invention relates to the field of laser amplifier equipment, in particular to a multi-pass laser amplifier which comprises a laser amplifier and a laser oscillator which are matched with each other, the laser amplifier and the laser oscillator are both arranged in a functional cavity, and the functional cavity is of a cuboid structure. A moving guide rail is arranged on the lower bottom face of the functional cavity, and the laser amplifier and the laser oscillator are sequentially arranged on the moving guide rail and can move back and forth on the moving guide rail in the length direction of the moving guide rail. The technical problems that in the using process of an existing laser amplifier, local high-temperature denaturation occurs after long-time laser irradiation of glass windows at the front end and the rear end, and then the service life is shortened, and the light transmissivity is reduced are solved.

The present invention provides a terahertz broadband high-sensitivity sensor chip based on local field enhancement and a manufacturing method thereof, which includes a Vivaldi antenna, an artificial surface plasmon waveguide with a metal groove structure, a terahertz wave is input through an input end waveguide, and the Vivaldi antenna at one end couples the terahertz wave to the artificial surface plasmon waveguide, and the terahertz wave is transmitted in the waveguide under the constraint of the artificial surface plasmon waveguide, and the terahertz wave on the waveguide is coupled back to the free space by the Vivaldi antenna at the other end and is received by the terahertz detector; a circular metal area is provided at the inner edge of the artificial surface plasmon waveguide to increase the effective working bandwidth of the sensor chip. The present invention has high sensing sensitivity and high effective working bandwidth, can reduce reflection, and improve coupling efficiency, thereby solving the resonance peak generated by the metamaterial sensor due to its special structural design, has a simple preparation process, and has low equipment price, and can be applied on a large scale.

The invention discloses a sensing probe assembly, a fluidic optical fiber sensing system and a preparation method, and relates to the cross technical field of optical fiber sensing technology and microfluidic detection. One free end of a single-mode optical fiber in the sensing probe assembly is fixed to the outer wall of a first square capillary tube through ultraviolet curing glue, and a second square capillary tube is coaxially or parallelly inserted into an inner cavity of the first square capillary tube. A uniform air gap is formed between the inner wall of the first square capillary tube and the outer wall of the second square capillary tube, a microfluid channel is formed in the middle of the second square capillary tube, and broadband light beams emitted from the single-mode optical fiber are vertically incident. The micro-fluidic chip sequentially penetrates through the ultraviolet curing adhesive, the upper wall of the first square capillary tube, the air gap and the upper wall of the second square capillary tube, enters the micro-fluidic channel filled with liquid to be detected, then penetrates through the lower wall of the second square capillary tube and finally reaches the lower wall of the first square capillary tube. The probe has the advantages of high detection sensitivity, strong light beam coupling stability and the like.

The invention provides an optical lens and electronic equipment. The optical lens sequentially comprises, from a first side to a second side, a first lens with focal power, a second lens with focal power, a third lens with focal power and a fourth lens with focal power, the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a concave surface; the third lens has positive focal power, and the second side surface of the third lens is a convex surface; the fourth lens has positive focal power, and the first side surface of the fourth lens is a convex surface; the first side face of the fifth lens is a convex face, and the second side face of the fifth lens is a concave face. According to the invention, the problem that small CRA, high MTF and rear focal length of an optical lens in the prior art are difficult to consider at the same time is solved.

The present invention relates to the field of optical fiber technology, and further to a wide-wavelength optical fiber array based on thin-film lithium niobate optical fiber. It comprises: a substrate, a dispersion compensator, an optical coupler and an optical fiber array; a lithium niobate thin film formed by lithium niobate deposition is disposed on the substrate; a waveguide structure is formed on the lithium niobate thin film by photolithography and etching; the optical fiber array comprises a plurality of optical fibers; the optical coupler is used to couple the optical signal in the waveguide structure to the optical fiber array or to couple the optical signal in the optical fiber array to the waveguide structure; the dispersion compensator is used to perform dispersion compensation on all optical fibers in the optical fiber array. The present invention solves many problems in the prior art, such as insufficient dispersion compensation, signal distortion and signal loss caused by nonlinear effects, etc.

The present disclosure relates to a solar cell. The solar cell comprises: a first cell, the first cell being a narrow-bandgap solar cell, the narrow-bandgap solar cell having oppositely arranged light-receiving and back surfaces; and an anti-reflection stack located on the light-receiving surface of the narrow-bandgap solar cell; wherein the anti-reflection stack comprises a plurality of anti-reflection sub-layers; the refractive index of the plurality of anti-reflection sub-layers decreases first and then increases along a direction from the back surface to the light-receiving surface, and the refractive index of a first end of the anti-reflection stack is smaller than that of a second end. Thus, by means of the "low-high" refractive index gradient of the anti-reflection stack, the reflection of light of different wavelengths can be regulated, the light reflection loss in the target wavelength band is reduced to a minimum, the light transmission efficiency is maximized, more incident light is effectively coupled to the light absorption region of the solar cell, and the photoelectric conversion efficiency of the solar cell is improved.

The invention discloses a method for coupling a distributed feedback laser and an electric absorption type modulator waveguide, which comprises the following steps of: taking a substrate with an electric absorption type modulator and a waveguide, and forming a self-alignment microcavity with a positioning structure on the substrate; manufacturing a microcavity metal film electrode and a solder layer in the self-aligned microcavity; making a self-alignment mark on the distributed feedback laser; the distributed feedback laser is placed in the self-alignment microcavity, and self-alignment high-precision optical path coupling of the distributed feedback laser and the electric absorption type modulator waveguide is completed by adopting a back-off welding bonding process. In the invention, the self-alignment microcavity with a positioning structure is manufactured on the substrate and the self-alignment mark is manufactured on the distributed feedback laser to carry out self-alignment on-chip heterogeneous integration on the DFB and the EAM, so that efficient, stable and compact optical path coupling is realized, and the device has the advantages of high coupling efficiency, low cost, short period and compact structure; the method is an ideal choice for realizing excellent monochromaticity and a high-speed modulation light source.