Low-internal-heat solid laser amplifier

Abstract

The invention provides a low-internal-heat solid laser amplifier. The low-internal-heat solid laser amplifier comprises a gain medium, a long-wavelength pumping light generating module and a long-wavelength pumping light control module, wherein the long-wavelength pumping light generating module comprises a pumping source, working substance and a resonant cavity; the pumping source is located outside the resonant cavity; the working substance is positioned in the resonant cavity; the long-wavelength pumping light control module is positioned in a long-wavelength pumping light oscillation pathin the resonant cavity in the long-wavelength pumping light generating module, wherein the light emitted by the working substance in the long-wavelength pumping light oscillation path directly entersthe side face of the gain medium; and the gain medium penetrates through the long-wavelength pumping light oscillation path.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to an anti-Stokes fluorescent cooling effect solid-state laser amplifier, in particular to a low internal heat solid-state laser amplifier with high laser power, high beam quality and compact structure. Background technique [0002] With the continuous advancement of high-energy laser technology, the characteristics of lasers such as average power, pulse energy and beam quality have been continuously improved, and these characteristics have greatly promoted their wide application in precision detection, advanced manufacturing, cutting-edge science and scientific instruments. . Among them, based on the advantages of stable operation and convenient maintenance, solid-state lasers have become the first choice for obtaining high-power, high-beam-quality laser output. However, in solid-state lasers, a large amount of waste heat is also generated when the laser is generated. T...

AI Technical Summary

Problems solved by technology

Theoretically, in a conventional laser system, the pump photon wavelength λ P , fluorescence wavelength λ F , output laser wavelength λ L The relationship between λ P F L , in contrast, in the laser system using ASFCE, the wavelength of the fluorescent photon scattered by ASFCE is shorter than the wavelength of the pump photon, that is, λ F P , however, in ASFCE-based laser systems, in practice, the average fluorescence wavelength λ of the entire gain medium is caused by a part of the fluorescence photons being reabsorbed by the gain medium F A redshift occurs, once the redshifted mean fluorescence wavelength λ F greater than the pump photon wavelength λ P , the effect of fluorescent cooling cannot be achieved, and the heat generated can no longer be offset, so that it is impossible to obtain a laser that suppresses the thermal effect

Therefore, in the current anti-Stokes fluorescent refrigeration technology, there are problems of limited pump power and high cost, and the fluorescent refrigeration system based on dual pump light also has the defect of complex structure. Therefore, how to effectively obtain High-power, long-wavelength pump light sources are bottlenecks in this field

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