Theoretical analysis of periodically poled LiNbO3 nonlinear mirror and its application in a passively mode-locked Nd:YSAG laser

• DOI: 10.3788/col202119.091403
• Publication Date: 2021-06-16T07:56:07Z
• Authors: Lina Zhao; Fangxin Cai; Luyang Tong; Ye Yuan; Wenyu Zhang; Yangjian Cai
• Keywords: Mode-Locking; Modulation (music)

In this paper, we report a passively mode-locked Nd:Y3Sc2Al3O12 (Nd:YSAG) laser using periodically poled LiNbO3 (PPLN) superlattice. Nonlinear mirror mode locking based on PPLN intracavity frequency doubling was theoretically analyzed. The modulation depth of nonlinear reflectivity the is approximately 8.8%. Optical performances including output power, radio spectrum, and optical spectrum were experimentally investigated. An average power 710 mW with slope efficiency 14.6% obtained at pump 6.5 W. repetition rate 101.7 MHz, signal-to-noise ratio pulse 45 dB. width 9 ps.