Peak Intensity Stabilization of Fundamental Laser through Second-Harmonic Generation Process

Abstract

In this paper, we report on numerical and experimental results for the peak intensity stabilization of a fundamental laser through the second-harmonic generation process by introducing a phase-mismatching factor. The peak intensity fluctuation of a nanosecond-order fundamental laser at 1064 nm is reduced from 7.0 to 1.1% with a type-I noncritical phase-mismatching lithium triborate crystal heated at a phase-mismatching temperature of 146.7 °C. The method is applicable to the power stabilization of the laser with a flat-top beam profile.