High-power terahertz radiation from surface-emitted THz-wave parametric oscillator

doi:10.1088/1674-1056/20/5/054207

Abstract 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.

Keywords: THz-wave parametric oscillator noncollinear phase matching THz-wave polarization frequency tunable output

Received: 18 November 2010
Revised: 17 January 2011
Accepted manuscript online:

PACS:	42.65.Yj	(Optical parametric oscillators and amplifiers)
	42.65.Dr	(Stimulated Raman scattering; CARS)
	42.65.Ky	(Frequency conversion; harmonic generation, including higher-order harmonic generation)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2007CB310403), the National Natural Science Foundation of China (Grant No. 60801017), and the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20070420118).

Cite this article:

Li Zhong-Yang(李忠洋), Yao Jian-Quan(姚建铨), Xu De-Gang(徐德刚), Zhong Kai(钟凯), Wang Jing-Li(汪静丽), and Bing Pi-Bin(邴丕彬) High-power terahertz radiation from surface-emitted THz-wave parametric oscillator 2011 Chin. Phys. B 20 054207

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High-power terahertz radiation from surface-emitted THz-wave parametric oscillator

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