78results about How to "Increase pump power" patented technology

A monolithic passively Q switched microlaser includes an optically transparent heat conductive element bonded to a gain medium, which is in turn bonded to a saturable absorber, which may also be bonded to a second optically transparent heat conductive element. Only the gain medium and saturable absorber are disposed within the laser resonator.

The invention relates to the technical field of novel lasers and discloses an alkali metal steam laser of polarized optical pumping. The alkali metal steam laser solves problems of high cost, low efficiency and low laser output power of existing semiconductor lasers and comprises an LD (laser diode) pumping unit, a gain unit and a resonance cavity, the LD pumping unit is placed outside the resonance cavity, the gain unit is placed in the resonance cavity, the LD pumping unit comprises an LD pumping source, a transmission optical fiber and a coupling lens group, a first magnetic pole and a second magnetic pole in the gain unit are arranged outside a constant-temperature furnace, an alkali metal steam pool is arranged inside the constant-temperature furnace, pumping light emitted by the LD pumping source is output to the coupling lens group by the transmission optical fiber, a coupling focusing piece enters the alkali metal steam pool through a polarized piece, effective particle number inversion of alkali metal atoms is realized under the action of pumping excitation, and alkali metal laser is formed under the feedback action of the resonance cavity and output by an output mirror. The alkali metal steam laser is low in cost, high in efficiency and high in laser output power.

The invention relates to a laser and provides a dual-wavelength tunable inner cavity tera-hertz parametric oscillator and a using method thereof to realize the output of continuous tunable dual-wavelength high-power THz wave and the stable operation at room temperature. The invention adopts a technical proposal that: a pumplight resonant cavity consists of a planar holophote, a laser and an output mirror; the laser is a quasi-continuous semiconductor laser array side-pumped neodymium yttrium aluminum garnet Nd:YAG5 laser; a back pressure type electro-optical switch Q consisting of monopotassium phosphate KD P crystal and a polaroid is arranged between the planar holophote,and the laser; a TPO resonant cavity consisting of a magnesium-doped lithium niobate MgO:LiNbO3 crystal and two cavascopes is arranged between the laser and the output mirror; and the optical axis of the TPO resonant cavity and the optical axis of the pumplight resonant cavity are non-colinear; and the side of the magnesium-doped lithium niobate MgO:LiNbO3 crystal and an array silicon prism are coupled to output the tera-hertz wave. The dual-wavelength tunable inner cavity tera-hertz parametric oscillator and the using method are mainly used for manufacturing the laser.

An optical system adapted to amplify an input signal includes an optical pump supporting the input signal and an optical pump beam. The optical pump includes an input port, a first active medium coupled to the input port, and a pump output coupled to the first active medium. The optical amplifier includes an amplifier input optically coupled to the pump output and adapted to receive the input signal after passing through the optical pump, a second active medium coupled to the amplifier input, and an amplifier output adapted to output the amplified input signal.

The invention is a strip laser of implementing Z-shaped light path by reflecting glass, characterized in that: laser medium is cuboid. Two end surfaces of the laser medium are bonded with undoped crystals, and pumped light enters through the reflecting glass and cooling water layer into the laser crystal and is absorbed by the laser medium. The top and bottom large surfaces of the laser medium are cooled with water. The laser resonance cavity is a flat cavity. And it reduces the effect of traditional Z-shaped strip on laser total reflection caused by thermal deformation of crystals and reduces the requirements for surface smoothness of crystals, and it eliminates stress induced laser birefraction and reduces end surface effect by the undoped crystals easy to radiate heat. Further, it reduces waste heat deposition in crystals by laser diode array side pumping, able to implement high power and high beam quality laser output.

The invention discloses a laser, relating to a diode solid state laser, in particular to a method for combining multiple Q-switching pulse lasers. Multiple groups of diode solid state lasers are distributed around a center axis on a shell bracket with the same radius; laser media are distributed around the center axis of a medium disk with the same radius; a medium disk driving device drives the medium disk to rotate, so that laser media in the medium disk fall into all optical axes of the laser resonant cavity on the shell bracket; laser medium pumping light in each resonant cavity is injected in by a pump laser diode; the laser medium is activated because of realizing population inversion; a Q-switching element is opened, laser is output out of the resonant cavity; and when heat effect generated when the laser medium is irradiated by the pumping light affects laser output quality, the Q-switching element is closed, the medium disk driving device drives the medium disk to rotate, and the next laser medium in the medium disk is on each optical axis of the laser resonant cavity to restart the next operation.

High-power, diode-pumped solid state (DPSS) pulsed lasers are preferred for applications such as micromachining, via drilling of integrated circuits, and ultraviolet (UV) conversion. Nd:YVO4 (vanadate) lasers are good candidates for high power applications because they feature a high energy absorption coefficient over a wide bandwidth of pumping wavelengths. However, vanadate has poor thermo-mechanical properties, in that the material is stiff and fractures easily when thermally stressed. By optimizing laser parameters and selecting pumping wavelengths and doping a concentration of the gain medium to control the absorption coefficient less than 2 cm−1 such as the pumping wavelength between about 910 nm and about 920 nm, a doped vanadate laser may be enhanced to produce as much as 100 W of output power without fracturing the crystal material, while delivering a 40% reduction in thermal lensing.

The invention relates to a laser, in particular to a full solid-state laser with an optical fiber coupling double-end pump, comprising a first pump source, a second pump source, a U-shaped type resonant cavity, a first gain medium and a second medium, wherein the U-shaped resonant cavity mainly consists of a plane total reflecting mirror, an output coupling mirror and two diphase color mirrors. The output coupling mirror and the plane total reflecting mirror are respectively arranged at the back of the first gain medium and the second medium, the first diphase color mirror and the second diphase color mirror are respectively arranged on a pump optical path of the first pump source and a pump optical path of the second pump source, and form a certain included angle of 90 degrees with the pump optical paths. The invention aims to design the full solid-state laser with the optical fiber coupling double-end pump which has large output power. Compared with the prior art, the invention has the advantages of better quality of light beams, favorable dynamic output stability of laser basic mode, better long-term work stability and the like.

The present invention relates to the field of fiber lasers, in particular to a polarization-maintaining fiber pumping combiner and a manufacturing device and method thereof. The polarization-maintaining fiber pumping combiner comprises a polarization-maintaining fiber 1 as a signal input channel, pumping fibers 2 and an output fiber. The polarization-maintaining fiber pumping combiner is characterized in that: the polarization-maintaining fiber pumping combiner further comprises a polarization-maintaining fiber-switching fiber 4; the polarization-maintaining fiber-switching fiber 4 is mode-matched through a mode matching section 3 of the polarization-maintaining fiber-switching fiber 4 with the polarization-maintaining fiber 1 as the signal input channel; the core diameter of one end of the mode matching section 3 is the same as the core diameter of the polarization-maintaining fiber 1; and a plurality of pump fibers 2 are evenly arranged outside the welded polarization-maintaining fiber 1. According to the technical scheme of the present invention, the problems that the existing pump combiner has a low power, the stress hole is easy to be damaged, and the environment is polluted during processing can be solved.

The invention discloses all-solid-state folding intra-cavity sum frequency yellow orange laser vascular disease therapeutic apparatus. The therapeutic apparatus comprises a first pump light source and a second pump light source, wherein the first pump light source is connected with a first transmission optical fiber, the first transmission optical fiber is connected with a first optical coupling unit, a first input endoscope, a first laser gain medium and a first bi-color mirror lens are arranged beside the first optical coupling unit in sequence, one end of the first bi-color mirror lens is a sum frequency crystal, the other end of the first bi-color mirror lens is a second bi-color mirror lens, and a total-reflection endoscope is arranged beside the sum frequency crystal; the second pump light source is connected with a second transmission optical fiber, and a second optical coupling unit, a second input endoscope and a second laser gain medium are arranged between the second transmission optical fiber and the second bi-color mirror lens in sequence. The all-solid-state folding intra-cavity sum frequency yellow orange laser vascular disease therapeutic apparatus has the advantages of being small in size, low in weight, compact in structure, available in all-solid-state air cooling, low in electricity consumption, convenient to carry, and capable of improving pumping power and reducing side effects.