42results about How to "Reduce the difficulty of coupling" patented technology

The invention discloses a photon lantern type degenerate module multiplexer / demultiplexer and a transmission method. The multiplexer / demultiplexer structure comprises a plurality of fiber cores, wherein the fiber cores for transmitting different LP modes are different in thickness, and degenerate modes in the same mode group adopt the same fiber core; the fiber core arrangement cross section is axisymmetric, the fiber cores in the excitation circular symmetry mode are arranged on the symmetry axis, and the fiber cores in the excitation non-circular symmetry mode are symmetrically arranged on the two sides of the axis; the fiber cores are arranged in concentric rings, and the fiber cores in the excitation LPpq mode are located on a q-th ring from outside to inside, and the fiber cores on the two sides of each ring are sequentially arranged in a thinning mode from the fiber core located on the symmetry axis; and one end of the arranged fiber core forms a conical coupling region of a multiplexer / demultiplexer through fused biconical taper. According to the invention, the degenerate mode group receiving problem is solved, and the degenerate mode group receiving method has the advantages of wide working bandwidth and low crosstalk.

An array waveguide raster for demultiplexing the multi-wavelength optical signals in dense wave division complexing system structurally features that the input coupler, waveguide array consisting of several cylindrical waveguides and output coupler are sequentially installed on planar substrate. Its method for transmitting optical signsl features that after optical signal is input in said waveguide array, the multi-beam interference takes place to separate the different light wavelengths in space position and output them. Its advantages are high stability, low cost and simple structure.

The invention discloses a water guide laser processing method and system. A non-uniform strong electric field generated by an electrode acts on a water beam; the deflected water beam falls verticallydownward; the laser focuses into the vertically downward water beam; and the water beam guides the laser to act on a workpiece. The workpiece is fixed to the bottom face of a water groove in a workingtable; a set of deflected water beam device is arranged; the water beam produced by a nozzle is on the same plane with the central line of the laser beam; the electrode is arranged under the water beam; the water beam is deflected vertically downward in the non-uniform strong electric field of the electrode; the laser focuses into the vertically downward water beam; and the water beam guides thelaser beam to act on the workpiece on the working table. Two to five sets of deflected water beam devices can be arranged, and all the water beams converge into a vertically downward total water beamto guide the laser beam. When the laser softens the surface material of the workpiece in a high temperature, the water beam cools the machined area at the same time, and therefore the thermal damage is reduced; the nozzle aligned with the center line of the laser beam is not needed and the nozzle is not ablated; the significantly reduced cost of the device facilitates the water guide laser being popularized and applied.

The invention discloses a direct-dimming-type InP-based monolithic integration few-mode optical communication transmitter chip which comprises an InP-based semiconductor laser array, a multimode interference power beam splitter, an optical waveguide connecting structure, a phase shifter and a multimode interference mode multiplexer. The InP-based semiconductor laser array converts to-be-transmitted signals into basic-mode optical signals, the multimode interference power beam splitter performs beam splitting on the basic-mode optical signals, the optical waveguide connecting structure is connected with the InP-based semiconductor laser array and the multimode interference power beam splitter, the phase shifter performs phase shifting on output of part of output ends of the multimode interference power beam splitter to generate second phase difference between the output of the output ends and output of other output ends and sends signals after phase shifting to the multimode interference mode multiplexer; and the multimode interference mode multiplexer multiplexes the optical signals, converts the basic-mode optical signals of part of lasers in the InP-based semiconductor laser array into an order mode and performs multiplexing output on the basic-mode optical signals together with the basic-mode optical signals of other lasers. By the chip, manufacturing difficulty and cost of devices and modules are lowered, and large-scale application of mode splitting multiplexing technology on a level of an access network is facilitated.

The invention discloses an optical module. The optical module comprises a tube shell, a light emitting assembly, a light receiving assembly, a light emitting interface and a light receiving interface,the light emitting assembly and the light receiving assembly are arranged in the tube shell, the light emitting interface and the light receiving interface are arranged on the tube shell, an output optical fiber is arranged on the side of the light emitting assembly, and an input optical fiber is arranged on the side of the light receiving assembly; the output optical fiber is wound around the light emitting assembly and the light receiving assembly and then is connected with the light emitting interface; the input optical fiber is wound around the light emitting assembly and the light receiving assembly and then is connected with the light receiving interface. The light receiving assembly and the light emitting assembly are flexibly connected with the corresponding interfaces through theoptical fibers, so that the coupling difficulty is reduced, and the light receiving assembly and the light emitting assembly can be placed flexibly. Attenuation of the optical module is mainly generated by the optical fiber, attenuation generated by optical port pressure in an optical port integration scheme is avoided, attenuation can be reduced, and output optical power and receiving sensitivity are improved.

The invention provides a method for debugging the wavelength of an optical module by using astigmatism. The optical module comprises a plurality of lasers, an optical multiplexer for combining the light of the plurality of lasers into one path and an optical fiber adapter coupled with the optical multiplexer, and the method comprises the following steps of (1) fixing the lasers, the optical multiplexer and the optical fiber adapter; and then obtaining the wavelength of each laser; (2) comparing the obtained wavelength of each laser with the corresponding central wavelength to obtain a difference value between the wavelength and the central wavelength; (3) acquiring an average value of the difference values between the wavelengths of the lasers and the central wavelength, and acquiring a compensation temperature corresponding to the average value of the wavelength difference values according to a change corresponding relation between the temperatures of the lasers and the wavelengths; and (4) compensating the temperature of each laser through a semiconductor cooler according to the compensation temperature. According to the present invention, the repair cost and time are prevented from being increased, the production cost and difficulty are prevented from being increased, and the debugging method is simple.

The invention relates to a laser gas detecting component, in particular to an integrated small-sized laser gas detecting component, and belongs to the technical field of detection. The integrated small-sized laser gas detecting component comprises a metal plate, a semiconductor cooler and a radiator which are sequentially connected from top to bottom, wherein a wiring terminal serving as an electric connector, a thermistor, a semiconductor laser device, a spherical-surface quartz lens, a photoelectric detector and a plane mirror are fixed above the metal plate; the laser transmitted by the semiconductor laser device passes the spherical-surface quartz lens to aim to the plane mirror and is reflected by the plane mirror and then received by the photoelectric detector; the semiconductor laser device, the semiconductor cooler, the photoelectric detector and the thermistor are respectively connected with the wiring terminal. The laser gas detecting component has the advantages that the components are encapsulated on the same metal substrate through the high-integration-level TDLAS system design, and the whole detecting component is allowed to form a laser gas sensing device which works independently.

The invention discloses a few-mode fiber degenerate mode group demultiplexer based on a fused biconical taper and a manufacturing method thereof. The demultiplexer provided by the invention comprisesa few-mode fiber arm and a two-mode fiber arm. The middle part of the few-mode fiber arm and one end of the two-mode fiber arm are fused to form a coupling region. One end of the few-mode fiber is denoted as a port 1, and the other end is denoted as a port 2. The other end of the two-mode fiber is denoted as a port 3. The port 2 and the port 3 are located on the same side of the coupling region. Adegenerate mode group to be demultiplexed is injected from the port 1, is transferred to the LP11 degenerate mode group of the two-mode fiber, and is output from the port 3. Other modes injected fromthe port 1 are directly output from the port 2. The few-mode fiber degenerate mode group demultiplexer provided by the invention is capable of achieving a better demultiplexing effect for a non-circular symmetric degenerate mode group.

Using plasma chemical vapor deposition (PCVD) and modified chemical vapor deposition (MCVD) technique, the method produces rare earth doped optical fiber core rod. Seven or nineteen pieces of rare earth doped optical fiber core rod arranged in dot matrix in hexagon are placed into sleeve so as to form preformrod of multi core rare earth doped optical fiber. Then, the preformrod is drawn into selforganizing coherent fiber optic waveguide in certain size. When laser is pumped and coupled to the multi core active optical fiber, under action of pumped light, rare earth active ions in the multi core generate upward conversion so as to excite laser with same frequency and consistent phase. Or coherent carried out spontaneously outputs optical fiber laser with high coherence. The invention realizes synchronous generation of laser and coherent of laser. Features are: selforganizing coherent, low requirement on parts of laser system, high practicability, and convenient for application.

The invention provides a plastic fibre rotating connector. One end of the fixed end sleeve of a fixed head is embedded with a fixed end fibre and the other end thereof is embedded with a fixed end lens; the end surfaces of the fixed end fibre and the fixed end lens are closely matched with each other in a contacting way; a fixed metal sleeve is arranged outside the fixed end sleeve. A movable endfibre is embedded at one end of the movable end sleeve of the rotating head and a movable end lens is embedded at the other end thereof; the end surfaces of the movable end fibre and the movable end lens are closely matched with each other in a contacting way; a rotating metal sleeve is arranged outside the movable end sleeve. The fixed end fibre and the movable end fibre are plastic fibres; the fixed end fibre sleeve is arranged outside at the end of the fixed end fibre which is embedded into the fixed end sleeve; the movable end fibre sleeve is arranged outside at the end of the movable endfibre which is embedded into the movable end sleeve. The plastic fibre rotating connector of the invention solves the technical problems that: in the background technique, the numerical aperture and core diameter of the fibre are small, the requirements on the mechanical processing precision and the assembly coupling precision are extremely rigid, the coupling difficulty is large and the cost is high. The plastic fibre rotating connector is especially applicable to local area network with a plurality of connecting points, and the short-distance information transmission system.

The invention discloses a direct-dimming-type InP-based monolithic integration few-mode optical communication transmitter chip which comprises an InP-based semiconductor laser array, a multimode interference power beam splitter, an optical waveguide connecting structure, a phase shifter and a multimode interference mode multiplexer. The InP-based semiconductor laser array converts to-be-transmitted signals into basic-mode optical signals, the multimode interference power beam splitter performs beam splitting on the basic-mode optical signals, the optical waveguide connecting structure is connected with the InP-based semiconductor laser array and the multimode interference power beam splitter, the phase shifter performs phase shifting on output of part of output ends of the multimode interference power beam splitter to generate second phase difference between the output of the output ends and output of other output ends and sends signals after phase shifting to the multimode interference mode multiplexer; and the multimode interference mode multiplexer multiplexes the optical signals, converts the basic-mode optical signals of part of lasers in the InP-based semiconductor laser array into an order mode and performs multiplexing output on the basic-mode optical signals together with the basic-mode optical signals of other lasers. By the chip, manufacturing difficulty and cost of devices and modules are lowered, and large-scale application of mode splitting multiplexing technology on a level of an access network is facilitated.

The present invention provides a method for adjusting the wavelength of an optical module by using astigmatism. The optical module includes a plurality of lasers, an optical multiplexer for combining the light of the multiple lasers into one path, and an optical fiber adapter coupled with the optical multiplexer. The method includes the following steps : (1) after fixing the laser, optical multiplexer and fiber optic adapter, obtain the wavelength of each laser; (2) compare the obtained wavelength of each laser with the corresponding center wavelength, and obtain the difference with the center wavelength; (3) Obtain the average value of the difference between the wavelength and the center wavelength of each laser, and obtain the compensation temperature corresponding to the average value of the wavelength difference according to the corresponding relationship between the temperature of the laser and the wavelength; temperature compensation. The invention avoids increasing repair cost and time, avoids increasing production cost and difficulty, and has a simple debugging method.

The invention relates to the field of optical communication, and relates to a dimming method and a dimming device for automatic coupling of an optical switch. The dimming method includes: resetting afine adjusting frame to enable an optical fiber base pin to be close to and parallel to a lens end face; switching to Port 1, controlling the optical fiber base pin to move rectilinearly on an X axis,a Y axis and a Z axis to search light, and adjusting insertion loss of a Port 1 optical path in a qualified limit; switching to Port 2, controlling the optical fiber base pin to rotate in on a T axis, an H axis and the X axis to search light, and adjusting insertion loss of a Port 2 optical path in a qualified limit while the insertion loss of the Port 1 optical path is qualified. According to optical path characteristics of the optical switch and optical path coupling characteristics, movement rules of the optical fiber base pin is quantified and used for controlling a stepping motor, the optical fiber base pin is driven to move, automatic aligning and debugging between the optical fiber base pin and a lens are realized, coupling difficulty is lowered, labor cost is reduced, debugging efficiency, repeatability, consistency and accuracy are improved, and large-scale production can be realized.

The embodiment of the invention provides a coupling method of a light emitter and the light emitter, and relates to the technical field of optical communication. According to the embodiment of the invention, the coupling process of the light emitter can be simplified, coupling time is saved, and production cost is reduced. The method comprises the following steps: fixing N lasers, an optical multiplexing assembly and a displacement prism at preset positions; when a first laser in the N lasers is in a light emitting state, coupling and fixing a first lens corresponding to the first laser; fixing the second lens at a preset position; when the first laser is in a light-emitting state, coupling and fixing the optical fiber adapter; and respectively coupling and fixing the N-1 first lenses respectively corresponding to the N-1 lasers according to the optical power received by the optical fiber adapter in the light emitting states of the N-1 lasers except the first laser. The invention is applied to the production and assembly of the light emitter.

The invention provides a regular hexagonal annular microstrip line double-pass charged tuning filter, which includes a dielectric substrate and a hexagonal annular microstrip line structure on the upper surface of the dielectric substrate; the regular hexagonal ring includes an outer ring and an inner ring, A pair of 50 ohm input and output microstrip lines, a pair of V-shaped microstrip lines, an opening on one side of the regular hexagonal outer ring, an opening on the left and right sides of the regular hexagonal inner ring, and four pairs of parallel wires are drawn from the opening. Microstrip lines, two pairs of parallel microstrip lines point to the center of the inner ring, and the microstrip line that is far away from the 50 ohm input and output microstrip lines is connected to the external bias circuit, and the other two pairs of parallel microstrip lines are far away from the inner ring. The center of the ring is connected to the outer ring. When different bias voltages are used, the first passband of the filter is continuously adjustable under the action of the varactor diode, and the second passband remains unchanged. The filter of the invention has the characteristics of small size, low insertion loss, continuously adjustable center frequency, high out-of-band suppression, fast tuning speed, convenient tuning and the like.

The invention is applied to the technical filed of optical communication, and provides a pluggable type adapter assembly for coupling of a collimating optical path. The pluggable type adapter assembly comprises an adapter 501, a lens assembly 502 and a protective sleeve 503. The lens assembly 502 is disposed inside the pipe-type protective sleeve 503, and one end of the adapter 501 is respectively connected with the lens assembly 502 and the protective sleeve; the end, which is connected with the protective sleeve 503, of an adapter metal piece 104 is a force fit end, the for fit end of the adapter metal piece 104 is in the form of a cylinder, and the diameter of the cylinder matches the internal diameter of the protective sleeve 503 to enable the adapter metal piece 104 to be inserted into the pipe-type protective sleeve 503; a ceramic insertion core 102 and a fiber 103 extend to the outside of the adapter metal piece 104 in terms of length and are connected with the lens assembly 502 inside the protective sleeve 503; and the lens assembly 502 comprises a third collimating lens 701 and a lens sleeve 702 which have the same in axial direction. According to the invention, when the pluggable type adapter assembly is coupled to a device shell assembly, parallel coupling of collimating light is realized, the efficiency during the parallel coupling of the collimating light is high, the coupling difficulty is low, and the coupling tolerance is large.