5results about How to "Improve laser efficiency" patented technology

The application discloses an electromagnetic wave oscillator capable of realizing dynamic coning adjustment, which comprises upper and lower iron core arrays symmetrically arranged relative to the center of an electron beam vacuum chamber; an excitation coil system comprises a plurality of excitation coils of the same specification wound on the main period iron core and the end iron core respectively, and generates a magnetic field perpendicular to the direction of electron beam movement; an independent power supply control system comprises a plurality of power supply modules corresponding to the main period and at least two independent end power supply modules; the independent power supply control system is connected with the excitation coil system, each period of excitation coil group is independently powered by two independent power supply modules, the current flow directions of a group of excitation coils opposite to each other are the same, and the current flow directions of adjacent excitation coils are opposite. The application can reduce the serious electron orbit distortion caused by the sharp change of the longitudinal magnetic field gradient in the strong coning mode, thereby providing an ideal technical scheme for the demand of improving the free electron laser efficiency, the inverse free electron laser accelerator and the like.

The semiconductor laser element sequentially comprises a substrate, a lower limiting layer, a lower waveguide layer, an active layer, an upper waveguide layer and an upper limiting layer from bottom to top, and the quantum limiting stark regulation and control layer is arranged between the active layer and the lower waveguide layer. The electric field distribution of the active layer is regulated and controlled, domain wall motion is induced to be generated, the quantum limited stark effect and InN phase separation of the active layer are inhibited, the interface quality is improved, and the non-radiative recombination center is reduced; light field limitation and limiting factors are enhanced, and the light power of the laser is improved; the quantum confinement stark regulation and control layer generates lattice displacement to induce phase change, improves mutual solution gaps of InN and GaN, inhibits InN segregation of the active layer and the waveguide layer, reduces In component fluctuation, reduces thermal degradation, improves interface crystal quality and thermal stability, reduces a non-radiative recombination center, and improves laser power and slope efficiency.

A platemaking apparatus (100) using laser engraving, a control system, a platemaking method, and a storage medium, which belong to the field of laser beam machining. The platemaking apparatus (100) using laser engraving comprises: a base (10); an XY motion platform (20), which is arranged on the base (10) so as to move transversely and is used for bearing a printing plate; a support platform (30), which is disposed on the base (10), a movement space being provided between the support platform (30) and the base (10) and allowing for transverse movement of the XY motion platform (20); a plurality of laser machining assemblies (40), the laser machining assemblies (40) being connected to the support platform (30), and at least a portion of the laser machining assemblies (40) being adapted to move relative to the support platform (30) and being used to perform laser engraving on the printing plate. The plurality of laser machining assemblies (40) are provided, such that laser engraving operations can be performed simultaneously so as to increase the platemaking speed. At the same time, the laser machining assemblies (40) are configured as movable structures, so that each laser machining assembly (40) can work independently, and different image or text content may be engraved on the printing plate in respective corresponding areas, thus allowing for completion of engraving of the entire printing plate.

A high-efficiency waveguide double-tapered single-crystal optical fiber gain module and an installation method thereof, comprising a double-tapered single-crystal optical fiber and a heat sink assembly; the heat sink assembly comprises a heat sink base and a heat sink cover plate; the heat sink base is provided with a cavity opening upward, a cooling liquid is provided in the cavity, the cavity is closed by the heat sink cover plate, and a sealing assembly is provided therebetween; the heat sink base is provided with through holes running through left and right, the through holes being connected to the cavity; the double-tapered single-crystal optical fiber comprises a single-crystal main body with cones on both sides and connected with the middle cone point, and a metal film layer plated on the outer side of the single-crystal main body, and the double-tapered single-crystal optical fiber passes through the through holes on both sides of the heat sink base; the high-efficiency waveguide double-tapered single-crystal optical fiber gain module and the installation method thereof not only realize high-efficiency heat dissipation of the double-tapered single-crystal optical fiber for generating high-power laser, but also extend the effective length of the double-tapered single-crystal optical fiber through the cladding layer, thereby improving the laser gain.

The present invention discloses an optical frequency comb generation device, application system and method. The present invention generates an optical frequency comb array through spatial multiplexing locking of an integrated gain waveguide structure, and the pulse repetition frequency can reach the GHz level, which can solve the technical problems of the existing optical frequency comb structure being complex and having limited application scenarios, and realize the integration and functionality of the optical frequency comb system.