Macroenergy solid laser coherent beam combining system based on stimulated Brillouin scattering

Abstract

The invention provides a large-energy solid laser coherent beam combination system based on stimulated Brillouin scattering. The large-energy solid laser coherent beam combination system comprises a laser source, a first beam splitting system, a second beam splitting system, a low-energy Stokes light generation system, a low-energy Stokes light amplification system I, a low-energy Stokes light amplification system II and a laser beam combination output system. Pump light generated by a laser source is injected into a low-energy Stokes light generation system, a low-energy Stokes light amplification system I and a low-energy Stokes light amplification system II through a first light splitting system; strokes light generated by the low-energy Strokes light generation system passes through a second light splitting system, and light beams are injected into a low-energy Strokes light amplification system I and a low-energy Strokes light amplification system II respectively; and finally, the amplified Stokes light and the pump light are guided into a laser beam combination output system for coherent beam combination and then output. According to the invention, 10ns pulse laser output under the condition that the repetition frequency is adjustable in a range of 1-10Hz can be realized, and the quality of the output light beam is higher.

Description

technical field [0001] The invention relates to the technical field of solid-state lasers, in particular to a high-energy solid-state laser coherent beam combining system based on stimulated Brillouin scattering. Background technique [0002] High-energy high-repetition-rate pulsed laser systems are widely used in laser processing, laser guidance, neutrino and proton generators, and laser fusion drives. The application of chirped pulse amplification technology has greatly promoted the development of high-energy, short-pulse-width, high-intensity laser technology, and the resulting extreme physical conditions provide development opportunities for the study of the interaction of light and matter. On the one hand, due to the limitation of the crystal growth process, the size of the laser crystal cannot be increased indefinitely, which limits the improvement of the laser output energy; A large amount of waste heat will be generated, limiting the improvement of beam quality and ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of thermal distortion and phase-locking difficulties in the coherent combining process of solid-gel lasers, the present invention proposes a high-energy solid-state laser coherent beam combining system based on stimulated Brillouin scattering, based on the stimulated Brillouin scattering phase Conjugate mirror and backward injected Stokes seed optical passive phase-locking technology, using the advantages of stimulated Brillouin scattering with nonlinear high-efficiency beam amplification and compensation of wavefront distortion characteristics, to increase the stimulated Brillouin scattering phase The reflectivity of the conjugate mirror reduces the stimulated Brillouin scattering threshold, amplifies the energy of the Stokes light, and locks the phase of the Stokes signal light in each sub-path to provide a low-energy / low-power Stokes Coherent synthesis of solid-state lasers based on the phase of the Kex seed light

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