High-power and high-quality, green-beam generation by employing a thermally near-unstable resonator design

Yong Bo; Aicong Geng; Yong Bi; Zhipei Sun; Xiaodong Yang; Qinjun Peng; Huiqing Li; Ruining Li; Dafu Cui; Zuyan Xu

doi:10.1364/ao.45.002499

High-power and high-quality, green-beam generation by employing a thermally near-unstable resonator design

Appl Opt. 2006 Apr 10;45(11):2499-503. doi: 10.1364/ao.45.002499.

Authors

Yong Bo¹, Aicong Geng, Yong Bi, Zhipei Sun, Xiaodong Yang, Qinjun Peng, Huiqing Li, Ruining Li, Dafu Cui, Zuyan Xu

Affiliation

¹ Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, China. boyong@aphy.iphy.ac.cn

PMID: 16623247
DOI: 10.1364/ao.45.002499

Abstract

We have obtained green-beam quality of M2 = 6.2 at an average output power of 120 W by intracavity frequency doubling of a diode-side-pumped, Q-switched Nd:YAG rod laser with a repetition rate of 10 kHz and an optical-to-optical conversion efficiency of 15.2%. To achieve high-beam quality at high average power, the laser employs a thermally near-unstable resonator design with two-rod birefringence compensation in an L-shaped flat-flat cavity. The output power fluctuation of the green laser remains less than 0.9% in 4 h.