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 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 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 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.