60results about How to "Guaranteed Coupling Efficiency" patented technology

Disclosed are a laser transceiver device and a laser radar. The laser transceiver device includes a light-splitting coupling unit that splits original light into first original light and second original light, an emerging unit that forms emergent light according to the first original light, and an acquiring unit that acquires echoed light to form signal light, and further includes at least one ofa first acting surface that reflects part of the first original light to form first local oscillating light and a second acting surface that reflects parts of the second original light to form secondlocal oscillating light. Since the first local oscillating light is formed by the first original light partly reflected by the first acting surface and the second local oscillating light is formed bythe second original light partly reflected by the second acting surface, the first local oscillating light and the second local oscillating light have relatively low power, thus the power of the emergent light can be improved effectively, so as to effectively extend the detection distance of the laser radar and expand the detection range of the laser radar while keeping the process and cost unchanged.

The invention discloses a preparation method and application of D-dimer immuno latex microspheres. In the preparation method of D-dimer immuno latex microspheres, a chemical crosslinking method is optimized, the carboxyl of polystyrene microsphere is activated in a low-pH condition and then coupled with amino of an antibody dissolved in a high-pH condition, and the mixture of the two is neutral and is coupled for 12-24h at a low temperature, so that not only can the coupling efficiency of the antibody be guaranteed, but also the damage of the antibody activity caused by an activator is reduced to a great extent. A latex enhanced turbidimetric immunoassay D-dimer test kit prepared from the immuno latex microspheres prepared by the method has the characteristics of high sensitivity, accurate quantification, good repeatability and stable property, and the lowest detection limit can reach 0.01mg / L; the latex enhanced turbidimetric immunoassay D-dimer test kit can be applied to a full-automatic biochemical analyzer or coagulation analyzer, is quick and easy to operate, only needs 5-10 minutes from detection to result collection and has relatively good clinical application prospect.

Disclosed are a laser transceiver device and a laser radar. The laser transceiver device includes a light-splitting coupling unit that splits original light into first original light and second original light, an emerging unit that forms emergent light according to the first original light, and an acquiring unit that acquires echoed light to form signal light, and further includes at least one ofa first acting surface that reflects part of the first original light to form first local oscillating light and a second acting surface that reflects parts of the second original light to form secondlocal oscillating light. Since the first local oscillating light is formed by the first original light partly reflected by the first acting surface and the second local oscillating light is formed bythe second original light partly reflected by the second acting surface, the first local oscillating light and the second local oscillating light have relatively low power, thus the power of the emergent light can be improved effectively, so as to effectively extend the detection distance of the laser radar and expand the detection range of the laser radar while keeping the process and cost unchanged.

The invention discloses a preparation method and application of C-reactive protein immuno latex microsphere. The preparation method of C-reactive protein immuno latex microsphere optimizes a chemical crosslinking method. The carboxyl of polystyrene microspheres is activated at a low pH, and is coupled with the amino group of a dissolved antibody at a high pH, the mixture of polystyrene microspheres and the dissolved antibody is neutral, after coupling for 12-24h at low temperature, the coupling efficiency of the antibody is ensured, and the damage of an activating agent on antibody activity is greatly reduced. A latex enhanced immunoturbidimetry C-reactive protein determination kit prepared by the immuno latex microsphere which is produced by the C-reactive protein immuno latex microsphere preparation method has the advantagess of high sensitivity, high accuracy, good repeatability and stable property, the quantitative linear range is 0.1-20 mg / L, and the latex enhanced immunoturbidimetry C-reactive protein determination kit can be used in a full-automatic biochemical analyzer or a coagulation analyzer. The operation is fast and simple, it only takes 5 to 10 minutes from detection to result collection, and the prospect for clinical application is good.

The invention relates to a torsional mode magnetostrictive sensor, a pipeline detection system and a pipeline detection method, and belongs to the technical field of ultrasonic detection. The magnetostrictive sensor includes a coil array and a permanent magnet array. The coil array is formed by connecting a plurality of racetrack coils in parallel, and the racetrack coils are fixed surrounding theouter surface of a pipeline, and are uniformly distributed along the circumference of the pipeline; the permanent magnet array is formed by permanent magnets which are staggered in polarity and a magnet base, and is mounted on the outer side of the coil array, and a spacing between the axially adjacent permanent magnets is equal to the half wavelength of an excited torsional mode guided wave; andthe pipeline ultrasonic guided wave in a torsional mode is excited on the basis of a magnetostrictive mechanism under the coaction of an axial static bias magnetic field provided by the permanent magnet array and a circumferential dynamic magnetic field provided by the coil array. The torsional mode magnetostrictive sensor has the advantages of effectiveness in exciting and receiving ultrasonic guided waves in the torsional mode in a steel tube, single excited mode, high signal-to-noise ratio, and convenience in for realizing comprehensive detection of the pipeline.

The invention belongs to the technical field of optical communication and particularly relates to a COMBO PON optical component based on a passive PLC optical waveguide technology. The optical component integrates two transmitting terminals in a butterfly-shaped package through a wave-combining PLC chip, accordingly two transmitting parts and two receiving parts for outside optical path coupling are simplified into one transmitting part and two receiving parts, and coupling of outside optical paths is greatly simplified. The optical component can be installed in an XFP housing and can be alsoinstalled in an SFP+ housing, two receiving terminals adopt full-collimating optical paths, the responsivity is 1dB higher than that of a traditional scheme, and the overall yield of the optical component is improved.

The invention relates to a high-power laser multipath optical fiber sampling time waveform measuring device which is characterized by comprising a high-speed digital oscilloscope and a high-power laser to be measured; a first photoelectric detector is connected with the first input end of the high-speed digital oscilloscope through a first cable to form an external trigger circuit; multiple paths of sampling optical paths are arranged at plurality of points to be measured of the high-power laser to be measured; each path of sampling optical path comprises a sampling mirror, an optical attenuator, a coupling device and a sampling optical fiber which are sequentially connected; and the sampling optical fibers of the multiple paths of sampling optical paths are connected with the input end of an optical fiber combiner, the output end of the optical fiber combiner is connected with a second photoelectric detector, and the output end of the second photoelectric detector is connected with the second input end of the high-speed digital oscilloscope through a second cable. The invention has the advantages of small volume, strong anti-interference capability, adjustable length, flexible light beam guidance, convenient integrated control and the like.

The invention discloses a helicopter optical atmospheric data system, and aims to provide an atmospheric data system which is strong in anti-interference performance, high in precision and reliabilityand high in comprehensive detection resolving capability. The method is realized through the following technical scheme: based on a laser Doppler wind-finding radar detection principle, a sensor assembly emits laser to a sensed assembly. The sensor assembly emits laser to the atmosphere through multiple lenses. A scattering laser signal carrying optical axis airspeed information after interactionwith the atmosphere is received at the same time, the scattering laser signal is sent back to the sensor assembly to be processed, the sensor assembly calculates the optical axis airspeed and furtherobtains airspeed information of the helicopter, and the airspeed information comprises three-dimensional airspeed, an attack angle and a sideslip angle; meanwhile, the static pressure sensor measuresto obtain an atmospheric static pressure signal, and the static temperature sensor measures to obtain an atmospheric static temperature signal; and the sensor assembly performs data fusion on the obtained airspeed information, atmospheric static pressure information and atmospheric static temperature information, and directly calculates and outputs a complete helicopter three-axis atmospheric data signal.

The invention discloses a backlight module and an LCD (liquid crystal display). The backlight module comprises an LGP (light guide plate) and a light source, wherein the LGP comprises a reflecting surface and a light-emitting surface, two bottom surfaces and two side surfaces are arranged between the reflecting surface and the light-emitting surface, and each of the two bottom surfaces is provided with a supporting bottom surface; the light source is in long strip shape and is arranged corresponding to one of the side surfaces of the LGP, the backlight module further comprises supporting pillars, and the supporting bottom surface is provided with a contact inclined plane; the supporting pillars clings to the contact inclined plane; one gravity direction is parallel to the length direction of the light source, when the LGP changes along the gravity direction, a force is generated between the LGP and the supporting pillars, and the supporting pillars push the LGP to the light source under the effect of the force.

The invention relates to a high-sensitivity light receiving device. The high-sensitivity light receiving device comprises an optical fiber adapter, an isolator, a tube shell, a first lens, a semiconductor optical amplifier, a second lens, an optical detection PIN PD chip and an output circuit board, wherein through holes are formed in the end surface of one end of the tube shell; the optical fiberadapter is arranged at one end, provided with the through holes, of the tube shell; the isolator, the first lens, the semiconductor optical amplifier, the second lens and the optical detection PIN PDchip are separately packaged in the tube shell and are in optical path connection in sequence; the output end of the optical detection PIN PD chip is electrically connected with one end of the outputcircuit board; and the other end of the output circuit board is electrically connected with an external electric signal receiving device. According to the high-sensitivity optical receiving device, high-sensitivity receiving can be realized, the product percent of pass is high, electric control is simple, and cost is effectively reduced; the semiconductor optical amplifier and the optical detection PIN PD chip are integrated, so that the miniaturization of the device is realized, and the realization of miniaturized single-channel SFP packaging or multi-channel QSFP packaging is facilitated.

The invention discloses a waveguide interlayer coupling structure and a preparation method thereof, relates to the technical field of silicon optical devices, and aims to solve the technical problem that an existing coupling structure is high in interlayer coupling loss. The waveguide interlayer coupling structure comprises: a substrate. a first waveguide formed on the substrate, wherein a first waveguide is located in the first area of the substrate; a first dielectric layer which is formed on the substrate and covers the first waveguide; and a second waveguide formed on the first dielectric layer, wherein the second waveguide is located in the second area of the substrate, and the projection of the first waveguide on the substrate and the projection of the second waveguide on the substrate have an overlapped area, so that light emitted from the second waveguide enters the first waveguide in a coupling manner. The end, close to the first waveguide, of the second waveguide is provided with a step-shaped structure, and the thicknesses of steps in the step-shaped structure are sequentially increased in the direction from the first waveguide to the second waveguide.

The invention provides a multifunctional integrated device for an ASE optical fiber source and belongs to the field of optical fiber communication. According to the multifunctional integrated device, an optical fiber collimator, a wavelength division multiplexer, an optical isolator, an optical switch and filters are integrated on a semiconductor chip. 980nm pump light is collimated and coupled through the wavelength division multiplexer and enters a rare-earth-doped optical fiber, and light generated by the rare-earth-doped optical fiber is collimated and coupled through the wavelength division multiplexer, the optical isolator and the filters and enters an output optical fiber. Based on the spectral signature of the light generated by the rare-earth-doped optical fiber, the filters are selected; specifically, when the spectrum of the light generated by the rare-earth-doped optical fiber is a 1560nm Gaussian spectrum, a chirp grating is selected; when the spectrum of the light generated by the rare-earth-doped optical fiber is a 1530nm Gaussian spectrum, the relay filter is selected, and when the spectrum of the light generated by the rare-earth-doped optical fiber is a flat spectrum, the band-pass filter is selected. The angle of the wavelength division multiplexer is 3.5 degrees. The multifunctional integrated device for the ASE optical fiber source guarantees the reflection efficiency and the coupling efficiency, reduces splice loss between devices and is small in size, good in stability and convenient to use.

An electric tuning optical switch device relates to a light switch device structure composed of an electric control fluid prism based on electric moisture effect, the switch device has a fluid prism light input array (1) and a fluid prism light output array (3) with rectangle or cylinder units, the space between the two arrays is formed into a light exchanging space (2); when the voltages are applied on between a left front power supply (15) and a left rear power supply (16), and between a right front power supply (18) and a right rear power supply (17), the interfacial tension between the conductive fluid and the side walls (19, 20) is reduced because of the electric moisture effect, thereby changing the fluid interface shapes and implementing the adjustment of the composition of the lens prism and shapes thereof, further implementing the regulation and control of the light deflection angle, the light exchanging electric control purpose can be reached by the input / output liquid prism array. The four sets of power supply voltages of light input prism unit and the corresponding light output prism unit are respectively kept for consistence to ensure the input / output light coupling.

The invention discloses a novel electromagnetic shielding piezoelectric interlayer. The novel electromagnetic shielding piezoelectric interlayer comprises a flexible printed circuit board, a piezoelectric sensor and an SMA interface, wherein the piezoelectric sensor is pasted on one side of the flexible printed circuit board, the SMA interface is fixedly connected to the other side of the flexible printed circuit board, and an insulating film is laid on the reverse side of the fixed connection position. According to the technical scheme, the novel electromagnetic shielding piezoelectric interlayer improves the resistance to high frequency electromagnetic interference, weakens crosstalk of signals in an adjacent piezoelectric interlayer, increases the signal to noise ratio of the signals, improves the reliability and consistency, enhances the coupling efficiency between the piezoelectric sensor and a structure, ensures the stimulation performance and sensor capability of the piezoelectric sensor, and boosts the wide application to astronautic structure health monitoring.

The invention discloses an ytterbium-doped multicore photonic crystal optical fiber mode-locked laser, which belongs to the technical field of laser. The laser has a sigma cavity structure, a main body of the laser is based on a ytterbium-doped multicore photonic crystal optical fiber, and a single-mode optical fiber is used as a mode selector for selecting modes; the laser works in a totally positive dispersion area, no chromatic dispersion compensating element is in a cavity, and a semiconductor saturable absorption mirror is used for starting mode locking. The invention has the advantages of stability and easy operation of mode selection and wide spectrum, narrow pulse width and high energy of output pulse; the mode field area of the used multicore photonic crystal optical fiber is two orders of magnitude larger than that of an ordinary optical fiber, the single pulse energy which can be supported by the multicore photonic crystal optical fiber is also more than 100 times than that of a traditional optical fiber laser, a used mode-selecting element is a single mode optical fiber, and the far-field distribution of an output mode field is gauss distribution.

A side-coupled dual-channel optical waveguide transmission system for a photonic crystal relates to a microstructural photonic crystal element in the field of optical technology, and solves the problem of large scattering resulting from high roughness of the existing photonic crystal waveguide. An efficient coupling structure for the photonic crystal waveguide and a traditional optical device or an external light source is provided. The system comprises a waveguide layer, a low refractive index buried layer and a substrate layer, wherein the waveguide layer is arranged at the upper part of the low refractive index buried layer, the lower part of the low refractive index buried layer is connected with the substrate layer; a mode that multiple photonic crystal resonant cavities are connected in parallel is adopted, electromagnetic waves are coupled in a photonic crystal waveguide defect area by a coupling area of a waveguide area II, and the coupling efficiency is high; and as the upper parts of the photonic crystal resonant cavities, corresponding to point defects, are distributed with coupling medium columns, the coupling efficiency is further improved. The whole photonic crystal waveguide is integrated on one substrate without external optical elements, so that a photonic crystal waveguide structure is more compact, is smaller in size and is higher in the integration degree.

A resonant-coupling two-way transmission photon crystal waveguide and a manufacturing method thereof relate to a micro-structure photonic crystal component in the optical technology field. The invention provides the coupling waveguide and the manufacturing method which can realize high efficient coupling between the photonic crystal waveguide and a traditional optical element or an external light source. According to the invention, a mode that a plurality of photonic-crystal resonant cavities are parallel to each other is used. Through a coupled zone of a waveguide second area, an electromagnetic wave is coupled into a photonic crystal waveguide defect area so as to achieve a purpose of increasing a coupling area. Coupling efficiency is high. Simultaneously, because of the increasing of the coupling area, convenience can be provided for operations, such as prefocusing before the coupling, alignment and the like. Because coupling medium columns are distributed on a position of an upper portion of the photonic-crystal resonant cavity, the coupling efficiency can be further increased, wherein the position corresponds with the position of a point defect. Besides, the whole photonic crystal waveguide is integrated on a same substrate. The external optical element is not needed so that the photonic crystal waveguide structure is compact, a volume is small and an integration level is high.

The invention discloses a high-performance and small-size superconducting resonator and a superconducting filter composed of superconducting resonators, wherein sapphire and high-temperature superconducting materials are applied to the design of the resonator or the design of the filter in a combined mode. The resonator comprises a waveguide resonant cavity and a cylindrical medium located in the center of the waveguide resonant cavity, one end of the cylindrical medium is connected with the bottom face of the waveguide resonant cavity to form a short-circuit end, the other end of the cylindrical medium is opened, the bottom face, connected with the cylindrical medium, of the waveguide resonant cavity is a short-circuit face, the short-circuit face comprises a superconducting film, and the cylindrical medium is made of sapphire. The superconducting resonator and the superconducting filter have the advantages that the filter has extremely low insertion loss (less than 0.1 dB), a rectangle coefficient approaching one and a small size; the insertion loss of the filter is reduced, more levels of filters can be designed accordingly, out-of-band rejection of the filters can be improved, and finally, the performance of the millimeter wave filters can be greatly improved.

The invention discloses a backlight module comprising light sources and a light guide plate, wherein the light guide plate comprises a light incident side; rays emitted by the light sources enter into the light guide plate through the light incident side; the light incident side is provided with a ray steering layer; and the tray steering layer is used for changing the direction of rays entering into the light incident side so as to shorten the distance from a cross point of rays emitted by two adjacent light sources to the light sources in the direction vertical to the light incident side. The invention also discloses a liquid crystal display.

The invention provides a light path beam combining and optical fiber coupling device of a spatial light laser. A system comprises two parts, namely a laser beam combining module and an optical fiber coupling module; the laser beam combining module comprises a cage type coaxial system and an optical system; the cage type coaxial system is used for fixing an exciter and an optical lens; the optical system is used for completing laser beam combination; and the optical fiber coupling module comprises an optical fiber coupler, a five-axis optical adjusting frame, a displacement table, an optical fiber and the like. The two lasers are fixed through the cage type coaxial system, the optical axes of the two laser beams are parallel, the first laser beam turns to reach the second beam combiner after passing through the first reflector, and the second laser beam directly reaches the second beam combiner to be combined with the first laser beam; and the combined laser is subjected to fine light path adjustment in a cage type system through a collimator and then is coupled into an optical fiber through an optical fiber coupler.

The invention relates to an optical fiber coupling connector which comprises a body, a photoelectric conversion module and two L-shaped optical fibers. The photoelectric conversion module is contained in the body and comprises a substrate, a light emitting module and a light collecting module. The light emitting module and the light collecting module are fixedly arranged on the substrate. The two L-shaped optical fibers are respectively located above the light emitting module and the light collecting module, a port of one of the two L-shaped optical fibers is directed at the light emitting module, and a port of the other one of the two L-shaped optical fibers is directed at the light collecting module. Light ray generated from the light emitting module ejects out after passing through one of the two L-shaped optical fibers, and the light collecting module receives a light ray coupled by the other optical fiber. The invention also relates to an optical fiber coupling connector component.

The invention discloses laser radar on the basis of an optical fiber mode field adapter. The laser radar has the advantages that the optical fiber mode field adapter is used in a telescope of the laser radar, an input end of the optical fiber mode field adapter is a large-mode-field optical fiber end, the large-mode-field optical fiber end is connected with an output end of an optical receiving and transmitting module and is used for receiving atmospheric echo signals, an output end of the optical fiber mode field adapter is a small-mode-field optical fiber end, the small-mode-field optical fiber end is connected with an optical receiver and is favorable for optical filtering and optical signal extraction, and accordingly the cost of the laser radar can be reduced; the problem of contradiction between received signal view field angles and optical data processing of existing laser radar can be ingeniously solved by the aid of the optical fiber mode field adapter, view field angles can be expanded while the echo signal coupling efficiency is guaranteed, the performance of the laser radar can be improved, the requirements of the optical receiver and photoelectric detectors on small mode fields can be met, follow-up data processing difficulty can be lowered, the integral performance of the laser radar can be improved, and the application range of the laser radar can be expanded.

The invention discloses a high-stability optical fiber laser comprising a beam combiner arranged in a resonant cavity. The first conical section of the pumped fiber and the coupling region on the signal fiber are fused and coupled to form the beam combiner. The gain fiber in the resonant cavity absorbs the pump light transmitted by the pumped fiber into the resonant cavity through the beam combiner so as to form laser to be outputted. The beam combiner is arranged in the resonant cavity so that the excessively high power pump light can be prevented from being directly injected into the fiber grating, the stability of the laser can be enhanced and the single resonant cavity laser is enabled to output the laser of higher power. Compared with the end surface pump technology, the pump fiber and the side surface of the signal fiber are fused and coupled and the signal insertion loss is almost zero so that the pump efficiency can be greatly enhanced, the heat generated in coupling can be significantly reduced, the optical-to-optical conversion efficiency of the laser can be enhanced, high power output of the optical fiber laser can be guaranteed and the stability of the optical fiber laser can be further enhanced.

The invention discloses a butterfly laser, and the laser comprises a shell, a laser chip, a beam splitter, an optical isolator, a prism, an optical detector, an optical fiber collimator, an optical fiber, and a lead wire connected to the laser chip, wherein the laser chip, the beam splitter, the optical isolator, the prism, the optical detector, the optical fiber collimator, the optical fiber andthe lead wire are disposed in the shell. The laser chip, the beam splitter, the optical isolator, the prism, the optical detector, the optical fiber collimator, the optical fiber and the lead wire areintegrated into a single package structure. According to the invention, the important parts of the laser are independently integrated and packaged, and then are combined with the shell, thereby guaranteeing the coupling efficiency of the laser, lowering the requirements for the processing technology, improving the efficiency. Moreover, the magnetic field interference can be reduced or avoided, the impedance is reduced, the precision of the laser is improved, and the laser is enabled to meet the application demands of the military industry.

The invention relates to a high-power pump beam combiner, which comprises a glass tube, an input fiber and an output fiber, wherein the glass tube is in a hollow structure; the input fiber passes through the glass tube; one end of the glass tube and one end of the input fiber are subjected to fusing and tapering to form a beam structure tapering section; and the output fiber is connected with the tapering section. The output fiber comprises a fiber core and a wrapping layer wrapping the fiber core. The diameter of the tapering section is smaller than the diameter of the fiber core. The invention also provides a fiber laser using the high-power pump beam combiner. According to the fiber laser and the high-power pump beam combiner thereof, one end of the glass tube and one end of the input fiber are subjected to fusing and tapering to form the tapering section, so that the numerical aperture of the input fiber is allowed to be smaller than or equal to the numerical aperture of the output fiber, coupling efficiency is effectively ensured, and light output efficiency is improved.

The invention discloses an optical module and relates to the technical field of optical fiber communication. The optical module can avoid relative motion between an adapter and an optical port member to ensure the coupling efficiency of an optical fiber. The optical module comprises a case, inside which the adapter and an optical sub-module are arranged and fixed to each other; the optical port member is arranged inside the case and on one side of the adapter, which is away from the optical sub-module, and one end of the optical port member, which is away from the adapter, is provided with an opening; the end surface of the optical port member, which is away from the adapter, is provided with a through hole, the adapter can penetrate the through hole and fix the optical port member, and the optical fiber can extends into the adapter via the opening.

The invention discloses a double-frequency-band low-phase-noise voltage-controlled oscillator and a signal generation device, and belongs to the technical field of circuit design, a coupling resonant cavity network comprises a first coupling resonator and a second coupling resonator, and the first coupling resonator and the second coupling resonator generate different resonant frequency signals under the control of tuning voltage; the emitter of the transistor is respectively connected to the output ends of the first coupled resonator and the second coupled resonator, and the transistor is used for amplifying the resonant frequency signal; and the broadband negative resistance network is connected with the base electrode of the transistor and is used for generating uniform or constant negative resistance on a tuning frequency band. The coupling resonant cavity network provides needed oscillation frequency, the negative resistance network is coupled with the base electrode of the transistor, the negative resistance value which uniformly changes in the whole transmission band is provided, and therefore it is guaranteed that the VCO can maintain stable oscillation in the whole S wave band, and meanwhile the good noise performance is kept.

The invention relates to a traveling wave photoelectric detector integrated with polarization coupling processing. The traveling wave photoelectric detector at least comprises one component unit. Each component unit comprises a radio-frequency transmission line, optical detection units arranged at the two sides of the radio-frequency transmission line respectively, two passive optical waveguides, a pair of ends of which are mutually connected, and a passive two-dimensional grating arranged at the joint of the two passive optical waveguides, wherein the radio-frequency transmission line is connected with the output ends of the optical detection units; and the two passive optical waveguides are used for providing optical signals for the optical detection units arranged at the two sides of the radio-frequency transmission line.

A two-dimensional side coupling photonic crystal waveguide single-channel system relates to a microstructure photonic crystal element in the technical field of optics, which can achieve efficient coupling between photonic crystal waveguide and a traditional optical device or an externally-arranged light source. The two-dimensional side coupling photonic crystal waveguide single-channel system adopts a mode that a plurality of photonic crystal resonant cavities are connected in parallel. An electromagnetic wave enters a coupling system formed by parallelly connecting the plurality of photonic crystal resonant cavities from a coupling area in a waveguide second area. The electromagnetic wave with the same waveguide response frequency with the parallelly connected photonic crystal resonant cavities and photonic crystal and photonic crystals enters a defect area through efficient coupling of the plurality of parallelly connected photonic crystal resonant cavities, achieves one-sided transmission in the defect area and emits out through one side of the photonic crystal waveguide, thereby achieving the purpose of improving coupling area. The coupling efficiency is high, and the photoniccrystal waveguide is compact in structure, small in size and high in integration level.

The invention discloses a light source driving circuit and a display module. The light source driving circuit comprises a red light driving circuit, a green light driving circuit and a blue light driving circuit; each driving circuit comprises a driving power supply, a driving chip and a plurality of lasers with the same color, wherein the driving chip comprises a plurality of current input ports,the plurality of lasers with the same color are connected in parallel; each current input port is connected with the cathode of one laser, and the anodes of the plurality of lasers are connected withthe driving power supply. In the application of an optical fiber scanning display technology in the prior art, in order to improve the brightness of a projected image and directly improve the outputpower of a laser, the energy utilization rate is low; the invention just aims to solve the above technical problem and provide a technical scheme capable of obtaining high-power effective laser optical power output and improving optical power utilization efficiency.