High-power tunable terahertz generation from a surface-emitted THz-wave parametric oscillator based on two MgO:LiNbO3 crystals

作者：Li, Zhongyang^*; Bing, Pibin; Xu, Degang; Yao, Jianquan

来源：Optik, 2013, 124(21): 4884-4886.

DOI：10.1016/j.ijleo.2013.02.031

• THz-wave parametric oscillator
• Noncollinear phase matching
• Tunable THz-wave

A high-powered tunable terahertz wave (THz-wave) has been parametrically generated via a surface-emitted THz-wave parametric oscillator (TPO) pumped by a multi-longitudinal-mode Q-switched Nd:YAG laser. The effective parametric gain length was enlarged by employing two MgO:LiNbO3 crystals. The tunable THz-wave radiation from 0.8 to 2.8 THz was realized via varying phase-matching angle between the pump wave and the Stokes wave. The maximum THz-wave radiation was 173.9 nJ/pulse at 1.7 THz as the pump energy was 82 mJ, corresponding to an energy conversion efficiency of about 2.12 x 10(-6) and a photon conversion efficiency of about 0.035%. The first-order, the second-order and the third-order Stokes waves were observed during the experiments.

• 出版日期2013
• 单位天津大学