Research Progress of Beam Quality Optimization Technology for Solid-state MOPA Lasers

Abstract Solid-state master oscillator power amplifier (MOPA) lasers are devices that combine the master oscillator and power amplifier of solid-state lasers to amplify low-power signals and output high-power lasers.They are widely used in laser processing precision measurement medical treatment and scientific research.Beam quality as a key indicator of laser output performance directly determines the effect and accuracy of the laser in these applications.However due to the thermal effect in solid-state MOPA lasers the beam quality often deteriorates continuously during the laser output process leading to performance degradation.Therefore optimizing beam quality has become a key to improving laser performance and has significant research and practical significance in the design and application of lasers.This paper reviews the research progress of beam quality optimization techniques for solid-state MOPA lasers focusing on introducing optimization methods such as thermal effect suppression technology negative lens method phase conjugation method deformable mirror method spherical aberration self-compensation method gain guiding method and beam shaping method.By analyzing the principles experimental progress and application