A Planar Waveguide Laser Amplifier Pumped with Tilted End Face

Abstract

The invention provides a planar waveguide laser amplifier with end face slant pumping. The planar waveguide laser amplifier comprises a pumping source, a pumping coupling lens group, a seed source, an isolator, a seed light coupling lens group and a planar waveguide laser gain medium. Pumping light emitted by the pumping source enters a gain medium end face slantwise after passing through the pumping coupling lens group; seed light emitted by the seed source enters the gain medium end face straightly after passing through the isolator and the seed light coupling lens group successively; the emission wavelength of the pumping source is within the absorption spectrum of the gain medium; the output wavelength of the seed source matches the emission spectrum peak of the gain medium. According to the solution, high power pumping light end face injection can be realized without using a spectroscope and it is easy to obtain high-power and high-beam quality laser amplification output.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a planar waveguide laser amplifier pumped with an end face tilt. Background technique [0002] All-solid-state lasers have many advantages such as high efficiency, compact structure, stable performance, and good output beam quality, and are widely used in industry, military, medical and scientific research. Especially in military and industrial processing, high-power all-solid-state lasers have good application prospects. The gain medium of early all-solid-state lasers usually chooses a round rod or a block structure, but there are serious thermal lens effects and birefringence effects under high-power pumping, which causes strong optical distortion in the gain medium and limits high-efficiency lasers. power output power. In order to increase the heat dissipation surface area and obtain high-power laser output, people have made many attempts and innovations in the form of gain m...

AI Technical Summary

Problems solved by technology

Slab waveguide laser combines the advantages of bulk solid-state laser and fiber laser, while avoiding the disadvantages of both: fiber laser has the advantages of compact structure, high efficiency, and less degradation of beam quality caused by waste heat. The disadvantage is that due to the extremely high laser brightness, it is very The linear effect directly limits the maximum output power; when the bulk solid-state laser is scaled and enlarged, there is basically no nonlinear effect problem. The disadvantage is that the beam quality degradation caused by waste heat is serious, and the structure is difficult to achieve small and compact

[0006] Because the gain medium of planar waveguide structure is difficult to process, domestic research on planar waveguide lasers is relatively small

Images