32results about How to "High laser output" patented technology

A high brightness, high power laser output is produced using a technique of splitting the outputs of multiple laser diode sources into two polarization states, wavelength combining the first polarization state from the multiple laser diodes, separately wavelength combining the second polarization state from the multiple laser diodes, and recombining the two polarized wavelength combined beams using a polarization combiner.

A sandwich rare earth ion doped yttrium aluminum garnet laser material with a sandwich ceramic and single-crystal composite structure is prepared from YAG and RE: YAG and is of the structure that the YAG is located on two sides and the RE: YAG is located in the middle, wherein the molecular formula of the YAG is Y3Al5O12, the molecular formula of the RE: YAG is REx: Y3-xAl5O12, the x is greater than or equal to 0.003 but is smaller than or equal to 0.3, and the RE is Yb3+, Nd3+ or Ho3+. By the adoption of a single-crystal ceramic composite process, the ceramic of the portion combined with a single crystal is integrated with an initial single crystal to obtain the YAG ceramic coated RE: YAG single crystal or YAG single crystal caoted RE: YAG ceramic sandwich composite structure, the thermal performance of a gain medium is improved, the laser pumping intensity is improved, greater energy laser output is achieved, and meanwhile good gain output and light beam quality are obtained.

The invention discloses a thulium-doped sodium yttrium fluoride laser crystal and a preparation method thereof. Tm<3+> rare earth ions are doped into a NaYF4 crystal to generate a monocrystal of which the chemical formula is NaY(1-alpha)TmalphaF4. The lithium yttrium fluoride monocrystal has the advantages of high solubility for Tm<3+> ions and favorable thermal, mechanical and chemical stability. The rare earth ions doped in the monocrystal have high luminescence efficiency; and by adopting a water-free oxygen-free sealed crucible descending process and carrying out high-temperature fluoridation treatment on the raw material, the preparation method can be used for preparing the high-quality crystal which is almost free of hydroxide ions and oxides. Under the excitation of an 800nm-wavelength LD, the crystal has strong 1.8 mu m fluorescence emission; and the obtained crystal has long fluorescence lifetime in the 1.8 mu m wave range, and thus, can be used as a middle-infrared laser crystal in a laser unit.

The invention provides a multiple degree of freedom optical frame for optical path adjustment. The frame comprises a pitch and yaw device, an up and down moving device, a left and right moving device,and a front and rear moving device. An adjustment frame provided by the invention has a modular characteristic. The adjustment frame suitable for a reflecting mirror or a transmission mirror can be produced by intercepting a key structure thereof. The shortcomings of a manual optical adjustment frame provided by the traditional technology are overcome. A reset mechanism is improved by using a screw fixing mode instead of return springs. When the optical path adjustment is completed, a moving plate and a fixing plate of a frame body are connected by screws, so as to increase the long-term stability of the frame. The reset mechanism can be used as an engineering application of laser devices. The scheme is low in cost and easy to realize. By using the adjustment frame, an optical path of a laser can be debugged and maintained, and the laser can be collimated quickly and conveniently to obtain a high-precision laser output.

The invention relates to a truss foldable sealing kilowatt CO2 laser, wherein two sides of two trusses both have six quartz discharge tubes connected via mirrors, while first end is output window, another end is mounted with resonance chamber mirror; the fifth quartz of first side has discharge end connected to the discharge end of sixth quartz via mirror, while the discharge end of fifth quartz at another side is connected to discharge tube of sixth quartz via mirror; another ends of two quartz discharge tubes are connected via mirror; therefore, it can form truss solid foldable structure formed by twelve quartz discharge tubes, while the angle between two nearby quartz discharge tubes is 9-12degree; one end of gas storage tube is through to the first end of first quartz discharge tube, while its last end is mounted with gate. The invention has high stability and compact structure, to obtain high power.

The invention discloses a surface emitting laser and an image forming device. The surface emitting laser oscillating at a wavelength Lambda comprises an upper reflector, a lower reflector, an active layer and a spacer layer. The spacer layer has a laminated structure comprising a first semiconductor sublayer with a composition of Al<x>Ga<1-x>As (x is more than 0 and equal to or less than 1) and a second semiconductor sublayer with a composition of Al<y>Ga<1-y>As (y is more than 0 and less than 1, and x is more than y).

The invention provides an astigmatism self-compensation solid laser, which comprises a pump source, a resonant cavity and a gain medium, wherein the gain medium has thermal lens astigmatism; the resonant cavity is an astigmatic cavity; and the gain medium is arranged in the resonant cavity in a way that the direction, with relatively poorer thermal effects, of the gain medium is in the meridian plane of the resonant cavity and the direction with relatively better thermal effects is in the sagittal plane of the resonant cavity. The solid laser can be obtained by compensating the astigmatism of the resonant cavity and the thermal lens astigmatism without inserting an additional astigmatism compensation element, and is high in output power, conversion efficiency, beam quality and stability, simple, convenient and reliable.

The invention discloses a direct liquid cooling high-power laser gain device based on a fuel injection pump, which relates to the technical field of high-energy laser. The gain device comprises a gainmedium for acquiring a laser gain, a device inner frame, laser cooling liquid, a cooling liquid inlet, a cooling liquid outlet, a device outer frame, a fuel nozzle for injecting fuel and realizing combustion, an ignition plug, a high-speed airflow inlet, a waste gas exhaust port and a combustion chamber for fuelcombustion. Compared with the prior art, the inner frame and the outer frame of the device are separated, meanwhile, controllable combustion of fuel in the open type combustion cavity can be achieved by designing the proper injection amount, injection angle and ignition time, and the uniformity and strength of optical pumping are guaranteed. On the other hand, the laser gain medium is cooled in a direct liquid cooling mode, effective thermal management is guaranteed, continuous high-power laser output can be achieved, the output laser beam quality is good, and meanwhile the device is compact, small and exquisite and can be used in various application scenes.

The invention relates to a truss foldable sealing kilowatt CO2 laser, wherein two sides of two trusses both have six quartz discharge tubes connected via mirrors, while first end is output window, another end is mounted with resonance chamber mirror; the fifth quartz of first side has discharge end connected to the discharge end of sixth quartz via mirror, while the discharge end of fifth quartz at another side is connected to discharge tube of sixth quartz via mirror; another ends of two quartz discharge tubes are connected via mirror; therefore, it can form truss solid foldable structure formed by twelve quartz discharge tubes, while the angle between two nearby quartz discharge tubes is 9-12degree; one end of gas storage tube is through to the first end of first quartz discharge tube, while its last end is mounted with gate. The invention has high stability and compact structure, to obtain high power.

An object of the invention is to provide a method for manufacturing a transparent substrate provided with a tin oxide thin film which can be satisfactorily patterned even by irradiation with a laser light having low energy because an ablation phenomenon occurs therewith. The invention relates to a method for manufacturing a transparent substrate bearing a circuit pattern, which comprises irradiating a thin-film-attached transparent substrate comprising a transparent substrate having thereon a transparent conductive film having a carrier concentration of 5×1019 / cm3 or higher, with a laser light having a wavelength of 1,064 nm to form a circuit pattern on the transparent substrate.

The invention provides a space-borne high-energy dual-wavelength all-solid-state pulsed laser, which includes an active Q-switched oscillator, a pre-power amplifier, a main power amplifier, and a frequency doubling module in sequence. The active Q-switched oscillator is a U-shaped resonant cavity, including a first Paul prism, first optical wedge, first wave plate, slab crystal, first polarizing beam splitter, second polarizing beam splitting prism, electro-optic Q switch, second wave plate, second optical wedge, second Paul prism and set in The pumping diode array on the slab crystal, the pre-power amplifier and the main power amplifier all include beam shaping mirror groups. The invention can realize pulsed laser output with high energy, high stability and high reliability, reduce the volume and weight of the laser, and is suitable for multi-platform applications, especially space-borne platforms, which can be used as space-borne aerosol detection lidar and space-borne ranging LiDAR and other detection light sources.

The invention discloses a high-power dual-wavelength human eye safe wave band Raman laser which comprises a laser diode pumping source, a focusing coupling system, an input cavity mirror of a Raman resonant cavity, a laser gain medium, an acousto-optic Q switch, a Raman gain crystal and an output cavity mirror of the Raman resonant cavity. And the Raman gain crystal is a SrWo4 crystal. Pumping laser of the laser diode pumping source is collimated and focused by the focusing coupling system and then enters the laser gain medium through a rear cavity mirror of the Raman resonant cavity, the laser gain medium generates stimulated radiation, and 1319nm and 1338nm fundamental frequency laser oscillation is formed in the Raman resonant cavity. When the power of fundamental frequency laser in the cavity reaches the threshold power of stimulated Raman scattering, the laser generates stimulated Raman scattering when propagating in the Raman gain crystal, first-order Stokes light of 1501nm and 1526nm is formed, and then the first-order Stokes light of dual wavelength is output through a front cavity mirror of the Raman resonant cavity. Compared with the existing 1.5 mu m human eye safe Raman laser, the laser provided by the invention realizes higher output power, and has the advantages of compact structure, high conversion efficiency and stable dual-wavelength Raman laser output.

The invention discloses a double-cavity excimer laser device complete-device frame system. A double-cavity excimer laser device comprises a main oscillation discharging cavity, a power amplification cavity and an optical system relevant to the two cavities. The double-cavity excimer laser device complete-device frame system comprises an installation base (1), a foundational frame (2), an optical system frame (3) and a discharging cavity frame (4), wherein the installation base (1) is a base of the complete-device frame system and used for bearing all components of the complete-device frame system, the foundational frame (2) is directly and fixedly installed on the installation base (1), the optical system frame (3) is used for installation of the optical system and separated from the discharging cavity frame (4), and the discharging cavity frame (4) is installed on the installation base (1) and used for bearing the main oscillation discharging cavity and the power amplification cavity. The double-cavity excimer laser device complete-device frame system can reduce influences of the discharging cavity on the optical system.

The invention discloses a gas discharge laser light source, belongs to the technical field of gas laser, and solves the technical problem that in the existing high-voltage pulse power supply, external conditions limit the development requirements of larger energy and higher repetition frequency in a laser light source system. The gas discharge laser light source system comprises a discharge cavity, a light condensation module and a line-width reduction module, wherein the discharge cavity comprises an inner ring and an outer ring; the outer ring is fixed and provided with a plurality of high-voltage power supplies and electrodes; each high-voltage power supply corresponds to each electrode mounted on the outer ring; the inner ring is drive by a motor to rotate; a plurality of electrodes are mounted on the inner ring; the electrodes mounted on the inner ring and the electrodes mounted on the outer ring form positive and negative electrodes. As the number and the positions of the high-voltage power supplies of the outer ring of the discharge cavity and the electrodes, the number and the positions of the electrodes of the inner ring in the discharge cavity, the inner ring rotating speed and high-voltage power supply discharge time sequence of the outer ring of the discharge cavity are changed, the laser output with larger energy and higher repetition frequency becomes possible.

The invention provides a multi-degree-of-freedom optical mirror frame for optical path adjustment, which includes pitch and yaw devices, up and down moving devices, left and right moving devices and forward and backward moving devices. The adjusting mirror frame provided by the present invention has the characteristic of modularization, and its key structure can be intercepted to produce an adjusting mirror frame suitable for a reflecting mirror or a transmitting mirror. Overcoming the shortcomings of the manual optical adjustment frame provided by the traditional technology, the reset mechanism is improved, and the reset spring is no longer used but the screw is fixed. After the optical path adjustment is completed, the moving plate and the fixed plate of the main part of the frame are connected by screws. Together, this increases the long-term stability of the frame for engineered applications of the laser. The solution is low in cost and easy to implement. The adjustment mirror frame can be used to debug and maintain the laser light path, quickly and conveniently collimate the laser, and obtain high-precision laser output.

The invention discloses a direct liquid-cooled high-power laser gain device for a fuel injection pump, and relates to the technical field of high-energy lasers. The gain device includes: a gain medium for obtaining laser gain, an inner frame of the device, a laser cooling liquid, a cooling liquid inlet, a cooling liquid outlet, a device outer frame, a fuel nozzle and an ignition plug for injecting fuel and realizing combustion, and a high-speed airflow inlet , Exhaust gas outlet, combustion chamber for fuel combustion. Compared with the prior art, the present invention focuses on the separate design of the inner and outer frames of the device. At the same time, the controllable combustion of fuel in the open combustion chamber can be realized by designing the appropriate injection volume, injection angle, and ignition time, ensuring the uniformity of optical pumping. sex and intensity. On the other hand, the present invention uses direct liquid cooling to cool the laser gain medium to ensure effective thermal management, not only can achieve continuous high-power laser output, but also has good output laser beam quality, and at the same time, the device is compact and small, meeting various requirements. Application scenarios.

The invention relates to a diode-pumped solid-state laser using a blue laser diode as a pump light source, which takes Cr-doped fluoroaluminate as a gain medium and can obtain 850nm laser output suitable for a laser radar. Due to the advantages of the blue laser diode in the aspects of light beam quality and power, the structure of the pumping system can be simplified, and the overall structure of the solid laser is further simplified; due to the advantages of the blue laser diode in the aspects of temperature range and temperature excursion, the solid laser is slightly influenced by the temperature excursion movement of the wavelength of the pump light, is high in reliability and is suitable for vehicle-gauge-level application. The microchip structure of the fixed heat-conducting transparent material is beneficial to reducing the influence of the pumping heat effect, and higher laser output can be obtained under higher pumping power.

The invention relates to a method for generating two-micron band single wavelength stable laser output and a laser device. The two-micron band single wavelength stable laser output can be obtained only by adjusting the parameter values of the crystal Tm doped concentration, the crystal length and the transmittance of the output mirror without changing the parameters of other devices so that blindadjustment of various device parameters in the prior art can be effectively avoided. Moreover, the power upgrading method is simple and the high-power laser output can be conveniently obtained.

The invention belongs to the technical field of lasers, and particularly relates to an extensible array fiber output laser. The extensible array fiber output laser includes an electrical module, N optical module units, laser output heads corresponding to the optical module units, and a light spot positioner, wherein N is greater than and equal to 2; the optical module units are connected with the laser output heads through fibers, and the N laser output heads are arranged in the light spot positioner; the electrical module simultaneously performs the power supply and control of the N optical module units; the laser output by the laser is transmitted to the corresponding laser output heads via the fibers; the laser output heads focuses the laser to form light spots; and the light spot positioner realizes the single-row or single-column, multi-row or multi-column array arrangement of the light spots. The extensible array fiber output laser solves the problems that a conventional laser is insufficient in power, insufficient in power density, and bad in safety and reliability, can be applied to the surface modification and restoration of large workpieces, and can be applied to any high melting point material due to the higher power density.

The invention belongs to the technical field of light-emitting materials and particularly relates to a preparation method of zinc-doped lutetium aluminum garnets. The preparation method comprises thefollowing steps: (1) adding high-purity lutetium trioxide powder and aluminum trioxide powder into absolute ethyl alcohol, carrying out ultrasonic cleaning for 20-50 minutes, and drying, so as to obtain a mixture; (2) adding the mixture into a hydrochloric acid solution, and stirring until the mixture is completely dissolved, so as to obtain a mixed solution; (3) adding zinc chloride and hydroxy propyl cellulose into the mixed solution, and uniformly stirring, so as to obtain a dispersed mixed solution; (4) slowly introducing carbon dioxide into the dispersed mixed solution until no precipitate is generated, introducing ammonia gas until no precipitate is generated, carrying out ultrasonic filtration, repeatedly washing with absolute ethyl alcohol, and drying, so as to obtain a mixed precipitate; and (5) carrying out constant-temperature drying on the mixed precipitate for 4-8 hours, cooling, crushing into powder through ball milling, and calcining, so as to obtain the zinc-doped lutetium aluminum garnets. According to the preparation method, the technical blank of the zinc-doped lutetium aluminum garnets is solved, and a new doping manner for lutetium aluminum garnets is provided.

The invention discloses a large-mode-field double-clad ytterbium-doped optical fiber, which comprises a fiber core, a quartz inner cladding that wraps around the outer periphery of the fiber core sequentially from the inside to the outside, a low-refractive index outer cladding and an outer coating, and the quartz inner cladding is close to the fiber core. The inner surface of the core is provided with a concave area of ​​refractive index. The core contains ytterbium. Along the diameter direction of the core, the concentration of ytterbium is distributed in a trapezoidal or parabolic shape from the inside to the outside. The diameter of the ytterbium doped area is smaller than or equal to that of the core. diameter. The present invention improves the refractive index distribution and doping distribution of the optical fiber without changing the mechanical properties of the optical fiber and without increasing the manufacturing cost and difficulty of the optical fiber. The combined action of the two can maintain the field area of ​​the fundamental mode, and combine the triangular and step-shaped The complex refractive index design of the fiber core is designed to adjust the balance between the effective mode field area of ​​the fundamental mode and the extraction efficiency of the fundamental mode by changing the composite shape, and concentrate the light field energy to the center of the fiber core, so the extraction efficiency of the fundamental mode can be improved, and the obtained High beam quality laser output, improved beam quality.

The invention discloses a gain device and a laser based on a micro-nano-structure semiconductor thin film. The micro-nano-structure semiconductor thin film includes a window layer (223), a microstructure layer (221) and a multi-quantum well layer (222) from top to bottom; The multi-quantum well layer (222) includes at least two barrier layers, and a well layer is included between different barrier layers; the barrier layer and the well layer are respectively prepared from different semiconductor materials; the gain device It includes a prism window (21) and the semiconductor film (22) with micro-nano structure; the laser includes at least one active mirror (2), and the active mirror (2) includes the gain device, a substrate (23), a heat sink ( 24) and focusing lens (25). The laser provided by the invention can realize output with high efficiency and high beam quality under high power conditions.

The invention relates to an all fiber Q-switch, which comprises a fiber, a V-shaped groove, a long-period grating pressed template, piezoelectric ceramics, a semiconductor chilling plate, a thermistor and a metal shell, wherein the fiber passes through the metal shell, and one section of the fiber is a bare fiber; the long-period grating pressed template, the bare fiber and the V-shaped groove are arranged from top to bottom in the metal shell to form a sandwich-like structure; optical cement is coated on the outer surface of the bare fiber; the piezoelectric ceramics is arranged between the inner top of the metal shell and the long-period grating pressed template; the semiconductor chilling plate closely attaches to the outer bottom of the metal shell; and the lateral surface of the V-shaped groove is closely provided with the thermistor for inducing the temperature of the V-shaped groove. The all fiber Q-switch has the characteristic of zero insertion loss. When the all fiber Q-switch is applied to a Q-switched fiber laser, the all fiber Q-switch can improve the output power and efficiency of the laser under the same conditions.

The invention provides a seed injection single frequency optical parametric oscillator which comprises an extra-cavity seed light source, an integrated driven resonant cavity, an electric control processing part and a single frequency pumping source. The seed injection single frequency optical parametric oscillator has the characteristics of compact structure, narrow linewidth, high optical quality and high frequency stability, is strong in capacity of resisting external disturbance, and can be applied to complex environments such as onboard or satellite-borne experimental platforms.

The invention discloses a gain device based on a micro-nano structure semiconductor film and a laser. The micro-nano structure semiconductor film comprises a window layer (223), a micro-structure layer (221) and a multi-quantum well layer (222) from top to bottom. The multi-quantum well layer (222) comprises at least two barrier layers, and a well layer is arranged between different barrier layers; the barrier layer and the well layer are respectively prepared from different semiconductor materials; the gain device comprises a prism window (21) and the micro-nano structure semiconductor film (22). The laser comprises at least one active mirror (2) which comprises the gain device, a substrate (23), a heat sink (24) and a focusing lens (25) and is characterized in that the active mirror (2)comprises the gain device; and the laser provided by the invention can realize high-efficiency and high-beam-quality output under a high-power condition.