Astigmatism self-compensation solid laser

Abstract

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.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to an astigmatic self-compensating solid-state laser. Background technique [0002] In high-power solid-state lasers, serious thermal lens effects limit the improvement of laser output power and beam quality. Alleviating and compensating the thermal effect of the gain medium is the key to developing high-power lasers. Alleviating the thermal effect of the gain medium can be achieved by using bonded crystals, laser crystals with low doping concentration, and tuning the wavelength of the pump source (deviating from the absorption wavelength of the gain medium). [0003] In the design of high-power lasers, not only the thermal lens effect of the gain medium must be mitigated, but also the thermal lens effect of the gain medium must be compensated. The ideal thermal lens can be treated as a thin lens, and the compensation method is relatively simple, which can be compensated by inserti...

AI Technical Summary

Problems solved by technology

[0005] However, methods 1, 2, and 3 need to insert additional optical components into the resonator, and the insertion of additional components increases the cavity loss of the laser, which is not conducive to improving the efficiency of the laser.

The third compensation method is not suitable for use in linearly polarized lasers, and non-linearly polarized laser output is not conducive to the generation of frequency-doubled light

The fourth method requires precise control of the temperature in all directions of the crystal, which greatly increases the complexity of the temperature control device

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