Measurement method of laser beam quality of solid-state laser

The beam quality M² is an important index to evaluate the transmission characteristics of the laser beam. The beam quality M² factor is an important parameter to reflect the solid-state laser beam quality M². This paper introduces the test environment, work state and testing method of measurement system for testing laser M², and analyzes the method of reducing the test uncertainty of M² factor. By restricting the test environment and test state, and combining with the method of reducing M² factor test uncertainty, the stability of the measurement condition is guaranteed, and the accuracy of measurement system is improved.