%0 Journal Article
%T High-power terahertz radiation from surface-emitted THz-wave parametric oscillator<br>
%A Li Zhong-Yang
%A Yao Jian-Quan
%A Xu De-Gang
%A Zhong Kai
%A Wang Jing-Li
%A Bing Pi-Bin
%A <br>
%J 中国物理 B
%D 2011
%I 
%X We report a pulsed surface-emitted THz-wave parametric oscillator based on two MgO:LiNbO3 crystals pumped by a multi-longitudinal mode Q-switched Nd:YAG laser. Through varying the phase matching angle, the tunable THz-wave output from 0.79 THz to 2.84 THz is realized. The maximum THz-wave output was 193.2 nJ/pulse at 1.84 THz as the pump power density was 212.5 MW/cm2, corresponding to the energy conversion efficiency of 2.42×10-6 and the photon conversion efficiency of about 0.037%. When the pump power density changed from 123 MW/cm2 to 148 MW/cm2 and 164 MW/cm2, the maximum output of the THz-wave moved to the high frequency band. We give a reasonable explanation for this phenomenon.
%K THz-wave parametric oscillator
%K noncollinear phase matching
%K THz-wave polarization
%K frequency tunable output<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=466C84F35DB3A9E00D4CD42C5F53A0B8&yid=9377ED8094509821&vid=A04140E723CB732E&iid=94C357A881DFC066&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=14