Investigation of pump-wavelength dependence of terahertz-wave parametric oscillator based on LiNbO3

• 来源期刊: 中国物理B（英文版）
• 关键词: terahertz-wave parametric oscillator THz-wave radiation pump-wavelength dependence
• 年，卷（期）: 2009,（7）
• 页码范围: 2846-2852
• 页数: 7页
• 语种: 英文

摘要

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.