Neodymium-doped yttrium vanadate crystal all-solid-state laser with double-wavelength end pump

Abstract

The invention discloses a neodymium-doped yttrium vanadate crystal all-solid-state laser with double-wavelength end pump, relating to the technical field of all-solid-state lasers. The first pump light emitted by a first diode laser is transmitted to a beam combining plane mirror through a first laser energy transmitting fiber and a first coupling lens assembly; the second pump light emitted by a second diode laser is transmitted to the beam combining plane mirror through a second laser energy transmitting fiber and a second coupling lens assembly; the first pump light and the second pump light are combined on the beam combining plane mirror to obtain the combined pump light; the combined pump light is focalized in a laser gain dielectric crystal by a resonant cavity reflector; and the laser gain dielectric crystal absorbs the combined pump light, and when the combined pump light absorbed by the laser gain dielectric crystal reaches a threshold, the laser gain dielectric crystal generates stimulated radiation and forms laser oscillation in the resonant cavity to obtain laser of 1064nm and output the laser by a laser output mirror. Because the output power and heat effect are well balanced, the output and operation of the solid-state laser are optimum.

Description

technical field [0001] The invention relates to the technical field of all-solid-state lasers, in particular to a dual-wavelength end-pumped neodymium-doped yttrium vanadate crystal all-solid-state laser. Background technique [0002] For LD (Laser Diode) pumped solid-state lasers, using the traditional 808nm pumping method will generate a lot of heat during the formation of oscillating light. A series of thermal effects (including thermal lens, thermal depolarization and thermal birefringence, etc.) formed by the heat in the laser gain medium will obviously change the output characteristics of the solid-state laser, for example: seriously affect the quality of the laser beam and strongly interfere with the laser output. Reduce the average output power of the laser. Not only that, but excessive heat deposition will also reduce the stability of the laser resonator, and even make the solid-state laser unable to operate stably in severe cases. It can be seen that the serious ...

AI Technical Summary

Problems solved by technology

However, increasing the doping concentration of the crystal will easily lead to concentration quenching, and increasing the crystal length will increase the loss in the cavity

Moreover, whether increasing the doping concentration or increasing the length, it is more difficult to prepare crystals than ordinary crystals.

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