Polygonal laser gain structure, laser oscillator and laser amplifier

Abstract

The invention discloses a polygonal laser gain structure, a laser oscillator and a laser amplifier. The polygonal laser gain structure comprises n side surfaces and also comprises doped regions and a non-doped region, wherein the doped regions are formed on m side surfaces of the polygonal laser gain structure; active ions are doped in the doped regions; the doped regions are used for amplifying and reflecting laser beams through pumping pump light beams; n is greater than or equal to 4; m is greater than or equal to 3 and less than or equal to n; and the non-doped region is arranged in a position, without the doped regions, of the polygonal laser gain structure, and used for transmitting the pump light beams and the laser beams. By adoption of the way, the multiple doped regions are integrated on the same polygonal body of the polygonal laser gain structure, so that the polygonal laser gain structure is compact in structure and relatively high in energy storage, capable of realizing high-light-beam-quality output, high in mechanical performance, and relatively high in output power and extraction efficiency.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a polygonal laser gain structure, a laser oscillator and a laser amplifier. Background technique [0002] With the continuous change of practical application requirements, in order to improve the output beam quality of solid-state lasers and increase the output power or energy, researchers have developed lasers with various structures such as rods, slabs and thin slices. Rod lasers are simple in structure and widely used. However, as the output power increases, rod lasers will suffer from severe thermal effects such as thermal focusing and stress birefringence, which deteriorate the beam quality and limit the further development of rod lasers. Therefore, the slab laser came into being. The slab laser medium has a large heat dissipation area, which can reduce the thermal effect in the medium and eliminate the stress birefringence phenomenon. Compensates for thermal effects in the...

AI Technical Summary

Problems solved by technology

However, the volume of the gain medium of the thin-sheet laser is limited, which restricts the energy storage of the laser, and the structure of the thin-sheet laser is complex and the stability is poor

Due to the limitation of doping concentration, a single thin-sheet laser has limited energy storage, which limits the energy of laser amplification output. The cascaded structure of thin-sheet lasers is very complicated and bulky.

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