296 results about "Coupling efficiency" patented technology

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 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 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 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 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.

The application relates to the technical field of automatic light coupling of fiber collimators, in particular to a light coupling method of a fiber collimator based on visual assistance, which comprises the following steps: extracting a main peak and all sub-peaks in a radial intensity distribution function, determining a light coupling distortion degree by analyzing the proportion of the main peak in all the sub-peaks, combining the discrete degree of the interval between the main peak and all the sub-peaks and the spot distortion degree, determining a light coupling distortion degree; based on the difference between the light coupling distortion degree and a light coupling trend value at each collection moment, using a cumulative sum control chart algorithm to obtain a distortion oscillation amount at each collection moment, to determine a confidence weight of a center coordinate to obtain an anti-drift spot center coordinate; determining a coupling efficiency at each collection moment to perform light coupling on the fiber collimator. The application solves the problems that the cumulative effect of instantaneous distortion interference causes the drift of spot center positioning and the misalignment of coupling efficiency calculation, and improves the reliability of light coupling termination decision.

The invention provides a non-contact power supply-based magnetic suspension rotor wireless energy transmission method and system, and relates to the technical field of non-contact power supply, and the method comprises the steps: carrying out the motion state vector reconstruction of a magnetic suspension rotor, and outputting a pose priority weight vector; setting a data acquisition scheduling strategy; receiving a six-degree-of-freedom native state set; after load impedance transient response data are received, the real-time pose of the rotor is reconstructed and output; fitting the instantaneous optimal frequency and the current waveform phase compensation amount of the resonant cavity; loading to an adaptive power mapping model, and predicting a power demand change trend; and dynamically tuning output parameters of the high-frequency inverter, and performing coupling efficiency offset compensation. The technical problem that the performance of a whole magnetic suspension system is affected due to the fact that a wireless energy transmission method in the prior art depends on static frequency and current waveform setting and is difficult to adapt to the rapidly changing motion state and load requirement of a magnetic suspension rotor in real time is solved.

The invention belongs to the technical field of integrated optical devices, and discloses a compact, high-efficiency and large-bandwidth thin-film lithium niobate end face coupler for large die spots, which comprises a substrate and an insulating layer, the single-layer back taper film lithium niobate waveguide layer, the first double-layer back taper film lithium niobate waveguide layer and the second double-layer back taper film lithium niobate waveguide layer are arranged on the insulating layer; the low-refractive-index waveguide layer is arranged in front of the thin-film lithium niobate waveguide, and the thin-film lithium niobate waveguide is covered with the three-dimensional tapering low-refractive-index waveguide wrapping layer. According to the invention, the coupling efficiency and bandwidth are improved by optimizing the low-refractive-index waveguide layer and matching with the mode of a laser chip large spot; the optical mode is efficiently and compactly coupled to the second double-layer inverted-cone waveguide layer by means of the single-layer and double-layer inverted-cone thin film lithium niobate waveguide layers in cooperation with the three-dimensional tapering low-refractive-index waveguide cladding layer and the transition cladding layer.

This invention belongs to the field of high-power semiconductor laser array coupling technology, specifically providing an optical element dispensing and curing system and method based on dual-target monitoring. The system includes a multi-degree-of-freedom precision displacement platform, a vision inspection unit, a dispensing system, a dual-path photoelectric feedback module, and a central control unit. The dual-path photoelectric feedback module includes a beam splitting unit, an optical power detection unit, and a spot imaging detection unit. The beam splitting unit splits the laser beam into two paths, one of which is used for beam analysis to obtain the beam arrangement. The optical power detection unit receives the other beam from the beam splitting unit and provides real-time feedback of its optical power value. The spot imaging detection unit receives the reflected sampled beam. The central control unit integrates an industrial control computer and a motion control card. This invention designs a closed-loop hardware system including a beam splitting prism, dual detectors, and a multi-degree-of-freedom platform to solve the problem of low multi-degree-of-freedom coupling efficiency in existing technologies.

The invention relates to the technical field of automatic optical coupling of optical fiber collimators, in particular to an automatic optical coupling method of an optical fiber collimator based on visual assistance, which comprises the following steps: extracting a main peak and all sub-peaks in a radial intensity distribution function, and analyzing the proportion of the main peak in all the sub-peaks to obtain an optical coupling result; determining the coupling light distortion degree by combining the dispersion degree of the distance between the main peak and all the sub-peaks and the light spot distortion degree; based on the difference between the coupling light distortion degree and the coupling light trend value at each acquisition moment, a cumulative sum control chart algorithm is adopted to obtain the distortion oscillation amount at each acquisition moment so as to determine the confidence coefficient weight of the center coordinate and obtain the center coordinate of the anti-drift light spot; and determining the coupling efficiency at each acquisition moment so as to carry out light coupling on the optical fiber collimator. According to the invention, the problems of drifting of light spot center positioning and misalignment of coupling efficiency calculation caused by the cumulative effect of instantaneous distortion interference are solved, and the reliability of coupling light termination decision is improved.

This application provides a superlens-based optical communication system, comprising: a superlens; an optical communication element; and a distance between the superlens and the optical communication element along the optical path propagation direction greater than or equal to one focal length of the superlens; the superlens is used to modulate the received light beam and output the modulated light beam. This application enables the coupling operation of the light beam in an optical communication system using a single superlens, improving the coupling efficiency of the light beam, increasing the light energy utilization rate, and reducing the production cost and size of the optical communication system.

This invention provides a near-infrared therapy device for improving Alzheimer's disease, characterized by comprising: a frequency-modulated drive circuit 1, a near-infrared LD light source 2, an optical fiber coupler 3, a light source power monitoring photodetector (PD) 4, an optical power monitoring circuit 5, an optical fiber beam splitter 6, an MPO optical fiber cable 7, and an optical transmitter 8. The optical transmitter includes an optical transmitter housing 8-1, a fiber-end hemispherical emitting microlens 8-2, and a beam-shaping coupling lens 8-3. This invention can be used to regulate the metabolism and cellular function of meningeal lymphatic endothelial mitochondrial cells, promote meningeal lymphatic transport in the central nervous system, thereby alleviating the pathological symptoms of Alzheimer's patients and enhancing their cognitive function. The device has a simple and compact structure, is easy to plug and unplug, has low optical signal loss, and high coupling efficiency. It can be widely used in novel non-invasive optical brain-computer interface devices and belongs to the field of fiber optic sensing technology.

A diffractive optical waveguide and a display device having the same are disclosed. The diffractive optical waveguide includes a grating structure formed on a surface of a waveguide substrate, the grating structure including a plurality of grating lines arranged in a plane, the grating lines each extending along a first direction in the plane and arranged at a predetermined interval in a second direction perpendicular to the first direction; at least one sidewall of each grating line having a periodic structure along the first direction; and the grating structure configured to diffract light incident thereon at a non-zero angle with respect to the plane out of the plane through a predetermined diffraction order. The grating structure employed in the above-described diffractive optical waveguide can be used to adjust the diffraction efficiency at different angles and / or different diffraction orders, thereby providing a new effective and flexible means for improving the angular uniformity and / or the out-coupling efficiency of the diffractive optical waveguide.

The invention discloses a short-wave ultraviolet low-loss ice micro-nano optical fiber waveguide structure and a preparation method thereof. Comprising a short-wave ultraviolet light source, a quartz single-mode optical fiber, an ice micro-nano optical fiber, an ice micro-nano optical fiber support and ice micro-nano optical fiber fixing glue, the short-wave ultraviolet light source is connected with one end of the quartz single-mode optical fiber, and the other end of the quartz single-mode optical fiber is directly connected with the input end of the ice micro-nano optical fiber in an end face coupling mode. And the ice micro-nano optical fiber is fixedly arranged on the tip of the ice micro-nano optical fiber support through the ice micro-nano optical fiber fixing glue, so that the ice micro-nano optical fiber is suspended. According to the invention, low-loss and high-efficiency transmission of short-wave ultraviolet light in the ice micro-nano optical fiber is realized by utilizing the characteristic of extremely low absorption of ice in the wave band and combining an end face direct coupling mode. The structure is high in coupling efficiency and low in transmission loss, and a new technical platform is provided for micro-nano scale transmission and integrated photon application of short-wave ultraviolet light.

This invention relates to the field of diamond fiber integrated probe technology, and particularly to a diamond fiber integrated probe, its preparation method, and its applications. The diamond fiber integrated probe disclosed in this invention includes an optical fiber and a diamond probe; the diamond probe comprises a diamond nanopillar, a diamond bulk material, and a diamond hemisphere; one end of the diamond bulk material is connected to the diamond nanopillar, and the other end is connected to the diamond hemisphere; the diamond hemisphere is connected to the optical fiber; the diamond nanopillar, the diamond bulk material, and the diamond hemisphere are all coaxially arranged with the optical fiber; the detection end of the diamond nanopillar is provided with an NV color center. The diamond nanopillar increases the fluorescence emission area and reduces the initial fluorescence loss at the detection end; the diamond bulk material collimates and transmits the fluorescence emitted from the nanopillar, reducing diffuse reflection loss during transmission; the diamond hemisphere, through a focusing effect, focuses the fluorescence collimated by the diamond bulk material onto the optical fiber transmission direction, improving the coupling efficiency of fluorescence to the optical fiber.

The embodiment of the present application provides a signal coupling structure and a communication device, which can guarantee high coupling efficiency while realizing large bandwidth coupling. The signal coupling structure provided by the embodiment of the present application comprises a substrate, a metal plate and a dielectric waveguide extending along a first direction. The substrate comprises a metal layer, and the metal layer comprises an antenna. The dielectric waveguide comprises a ground plane, which is connected with the metal layer and the metal plate in sequence along the first direction, and the ground plane is connected with the antenna on the metal layer. In the first direction at the connection position of the ground plane and the metal plate, a butt joint surface of the dielectric waveguide is further included, and the butt joint surface is used for being connected with a dielectric transmission line. At the connection position of the ground plane and the metal plate, a matching structure with a gradually changing size along the first direction is included, and the matching structure is used for coupling signals of the dielectric waveguide and the dielectric transmission line, and realizing conversion of signal modes between the dielectric waveguide and the dielectric transmission line.

The invention discloses a method for installing an optical interconnector by using a sleeve, which comprises the following steps of: firstly, respectively designing a collimator shell for two aligned collimators based on the model of the used collimators, enabling the inner diameter of the shell to be larger than the diameter of the collimator, and then, pouring glue into a gap between the shell of one collimator and the collimator, the relative positions of the collimators and the shells are fixed, a sleeve is adopted and used for alignment adjustment between the two collimators, the inner surface of the sleeve can be accurately matched with the shells of the collimators, the two collimators with the shells are placed in the sleeve, the relative position of one collimator and the corresponding shell is determined, and the other collimator and the corresponding shell can be accurately matched. When the coupling efficiency between the two collimators is highest, the position of the shell and the position of the sleeve are relatively determined, the position of the shell of the other collimator and the position of the sleeve are relatively determined, the other collimator is adjusted through the multi-degree-of-freedom displacement table at the moment, and when the coupling efficiency between the two collimators is highest, glue is poured between the other collimator and the shell, so that the corresponding position between the other collimator and the shell is determined.

The invention relates to the technical field of laser material processing, in particular to an attraction type laser and electric arc collaborative welding device. The device comprises a welding platform, a control host, a laser-arc hybrid welding unit with a moving module, a constraint channel unit and an attraction power unit. The restraining channel unit comprises a sealing belt and a sealing retracting and releasing assembly, the sealing retracting and releasing assembly and the laser-arc hybrid welding unit move synchronously, one end of the sealing belt is arranged on the sealing retracting and releasing assembly, and the sealing belt is attached to the butt joint gap between the two workpieces to be welded. The other end of the sealing belt is attached to one end of the butt joint gap and connected with the attraction power unit. By the adoption of the attraction type laser and electric arc collaborative welding device, the problems of low laser and electric arc energy coupling efficiency and poor stability in the laser welding process are solved, and the attraction type laser and electric arc collaborative welding device is suitable for laser welding of metal materials.

To improve coupling efficiency when coupling wavelength-coupled light beams with an optical transmission fiber. A wavelength beam coupling device couples a plurality of laser beams emitted from a laser light source and having mutually different peak wavelengths, and the central axes of the light beams emitted in a first direction are arranged in a second direction intersecting the first direction. The wavelength beam coupling device includes: first and second diffraction gratings, the first diffraction grating being disposed at a position receiving the plurality of laser beams and causing the plurality of laser beams to be diffracted in different directions according to wavelengths to be incident on the second diffraction grating, the second diffraction grating further diffracting the plurality of laser beams diffracted by the first diffraction grating to form wavelength-coupled light beams, and the wavelength-coupled light beams being emitted in the first direction; and an optical coupling unit coupling the wavelength-coupled light beams with the optical transmission fiber and configured to be movable in the second direction.

This invention relates to an end-face coupling structure for a low-loss silicon photonic chip, comprising a silicon substrate, a laser mounting region on the silicon substrate, a buried oxide layer on one side of the laser mounting region and on the silicon substrate, a shallow etched region on the buried oxide layer, and a beveled end face etched on the cross section formed by the buried oxide layer and the shallow etched region. The beveled end face is used to reduce reflection loss. A ridge waveguide facing the laser mounting region is disposed on the shallow etched region, and the incident end of the ridge waveguide is located at the beveled end face. This invention can achieve high coupling efficiency and alignment tolerance.

This makes it easier to increase the coupling efficiency of guiding incident light in an optical waveguide. [Solution] The optical waveguide (1) has an incident end (11) into which a predetermined input light is incident, and an exit end (12) into which the incident input light is emitted as guided light. The optical waveguide includes a first guide layer (31) having a first refractive index (n1) and extending from a first position at a predetermined distance (D1) from the incident end to the exit end in the guidance direction (Z) in which the guided light travels along the optical waveguide, and a second guide layer (32) having a second refractive index (n2) lower than the first refractive index. The first guide layer is not located within a predetermined distance from the incident end, but includes a comb-shaped region (31a) that branches out in a comb-like manner from a second position spaced apart from the exit end in the guidance direction toward the incident end and extends to the first position. The second waveguide layer is positioned adjacent to the first waveguide layer so as to extend a predetermined distance from the incident end in the waveguide direction and fill the comb-tooth region.

This application discloses a silicon nitride grating coupler and a silicon-based optical chip. The silicon nitride grating coupler exhibits high coupling efficiency when facing incident light of different wavelengths and modes. Specifically, it includes: a substrate; a first grating layer located on one side of the substrate; a second grating layer located on the side of the first grating layer opposite to the substrate, the second grating layer and the first grating layer being staggered, the duty cycle of the second grating layer being greater than that of the first grating layer, the second grating layer being used to change the scattering path of the incident light and guide the incident light to couple into the first grating layer; a third grating layer located on the side of the first grating layer opposite to the substrate, the third grating layer and the first grating layer also being staggered, the duty cycle of the third grating layer being less than that of the first grating layer, the third grating layer being used to reflect the diffracted light leaking from the first grating layer and guide the reflected light back to the coupling region of the first grating layer; and a waveguide layer connected to the first grating layer along the grating period arrangement direction of the first grating layer.

The utility model discloses a broadband high-power magic T combiner, which comprises a cavity and a coupling column arranged on the inner side of the cavity, the cavity is provided with an adjusting assembly used for adjusting the height of the coupling column, and the adjusting assembly comprises a coupling column adjusting screw which is rotatably connected to one side of the cavity and corresponds to the coupling column. A second threaded hole is formed in the end, close to the coupling column adjusting screw, of the coupling column, one end of the coupling column adjusting screw is in threaded connection with the second threaded hole, and therefore the coupling column moves in the axial direction when the coupling column adjusting screw is rotated. According to the broadband high-power magic-T combiner, the height of the coupling column can be conveniently adjusted through the arranged adjusting assembly, linear adjustment is achieved through threaded connection, a user is allowed to finely adjust the height of the coupling column according to actual requirements, it is ensured that signals reach the optimal interaction state in the coupling process, and therefore the coupling efficiency is improved, and the use frequency range is widened.

The invention discloses a high-power laser optical fiber module, an assembling method and an assembling device, the high-power laser optical fiber module comprises an optical fiber, the optical fiber is provided with an input end and an output end, the input end side is provided with a laser, a lens assembly is arranged on the optical path of the laser, and the lens assembly is arranged on the optical path of the laser. The lens assembly comprises a circular lens, a slow-axis collimating lens and a fast-axis collimating lens which are arranged in sequence, and the fast-axis collimating lens is close to the laser side. The high-power laser optical fiber module is high in optical coupling efficiency.

The invention discloses a self-adaptive coupling method of an optical fiber connector and an optical chip. The method comprises the following steps: driving an optical chip sending unit to emit light through an optical chip read-write module and reading internal receiving optical parameters in real time; the optical fiber splitter is connected with a receiving and transmitting port of the connector, and a transmitted optical signal is shunted to the mobile control module and an optical chip receiving end, so that optical path loopback and homologous detection are realized; the mobile control module utilizes a manipulator and a built-in optical power meter, combines an adaptive algorithm, and automatically adjusts the position of the connector according to the detected optical power and chip receiving parameters, thereby achieving the dual alignment of the transmit-receive lens and the optical chip. The system can greatly improve the coupling efficiency and yield, effectively screens bad components, and has a glue curing deformation compensation function.

An optical fiber array assembly, a signal receiving structure and an optical module. The optical fiber array assembly comprises an optical fiber array module (1) and a lens module (2) adapted to the optical fiber array module (1), wherein the optical fiber array module (1) comprises a base (11) and at least two optical fibers (14) arranged in an array on one side of the base (11), an end part of each optical fiber (14) is formed as a bevel (141), the lens module (2) is arranged on the other side of the base (11) and corresponds to the end parts of the optical fibers (14), optical signals transmitted by the optical fibers (14) are reflected into the base (11) via the bevels (141), the optical signals pass through the base (11) and then are emitted into the lens module (2), and the lens module (2) is used for converging the optical signals on a transceiver chip (4). On the one hand, a light spot of a smaller size can be obtained, such that not only high coupling efficiency is achieved, but also a position window of the optical fiber array module in which all of channels achieve high coupling efficiency is broader, thereby effectively reducing the process difficulty; on the other hand, the probability of a collision between the optical fiber array module and the transceiver chip is greatly reduced, thereby effectively improving the product yield.

The invention provides a color routing metasurface design method and an image sensor, the color routing metasurface comprises a plurality of routing units, one routing unit corresponds to one pixel group in a target image sensor, and one pixel group comprises a plurality of pixel units for sensing at least two different wave bands of light; the design method comprises an arrangement determination step of determining the arrangement of the nano-columns in the routing unit, wherein the arrangement determination step comprises the following steps: dividing one routing unit of the color routing metasurface into at least two sub-functional areas; lattice constants of periodical arrangement of the nano-columns in the sub-functional areas are determined, and the lattice constants of periodical arrangement of the nano-columns in at least two sub-functional areas are different; the accuracy and the spatial resolution of color routing are improved, and the coupling efficiency of the target wavelength light is enhanced to improve the energy utilization rate.