Investigation of pump-wavelength dependence of terahertz-wave parametric oscillator based on LiNbO3
Sun Bo(孙博)a)†, Liu Jin-Song(刘劲松)a), Li En-Bang(李恩邦)b), and Yao Jian-Quan(姚建铨)a)b)
a Wuhan National Laboratory for Optoelectronics, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; b College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China
Abstract This paper investigates the performances of terahertz-wave parametric oscillators (TPOs) based on the LiNbO3 crystal at different pump wavelengths. The calculated results show that TPO characteristics, including the frequency tuning range, the THz-wave gain and the stability of THz-wave output direction based on the Si-prism coupler, can be significantly improved by using a short-wavelength pump. It also demonstrates that a long-wavelength-pump allows the employment of a short TPO cavity due to an enlarged phase-matching angle, that is, an increased angular separation between the pump and oscillated Stokes beams under the THz-wave generation at a specific frequency. The study provides an useful guide and a theoretical basis for the further improvement of TPO systems.
Received: 07 January 2009
Revised: 24 February 2009
Accepted manuscript online:
Fund: Project
supported in part by the Foundation for Innovative Research of Wuhan
National Laboratory for Optoelectronics and the National Basic
Research
Program of China (Grant No 2007CB310403).
Cite this article:
Sun Bo(孙博), Liu Jin-Song(刘劲松), Li En-Bang(李恩邦), and Yao Jian-Quan(姚建铨) Investigation of pump-wavelength dependence of terahertz-wave parametric oscillator based on LiNbO3 2009 Chin. Phys. B 18 2846
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