Chinese Optics Letters, Vol. 17, Issue 11, 111404 (2019)
1514 nm eye-safe passively Q-switched self-optical parametric oscillator based on Nd3+-doped MgO:PPLN
Heyan Liu1, Yongji Yu1,*, Dehui Sun2, Hong Liu2, Yuheng Wang1, Hao Zheng1, Dan Li1, and Guangyong Jin1
- 1Jilin Key Laboratory of Solid Laser Technology and Application, School of Science, Changchun University of Science and Technology, Changchun 130022, China
- 2Institute for Advanced Interdisciplinary Research, University of Jinan, Jinan 250022, China
We examined a 1514 nm eye-safe passively Q-switched self-optical parametric oscillator. The nonlinear crystal is an a-cut Nd:MgO:PPLN crystal, and the size of the crystal was 6 mm × 2 mm × 30 mm with 0.4 at.% Nd3+ doped and a grating period of 29.8 μm. When the crystal absorbed 12.8 W, the output maximum single-pulse energy reached 39 μJ, and a pulse width of 6.1 ns at a repetition rate of 5.4 kHz was obtained. The peak power was 6 kW, giving a slope efficiency of 42%.