Open AccessContinuous-wave intra-cavity singly resonant optical parametric oscillator with resonant wave output coupling
Author(s) -
Quan Sheng,
Xin Ding,
Ce Shang,
Bin Li,
Chen Fan,
Haiyong Zhang,
Xiaoyang Yu,
Wuqi Wen,
Yila Ma,
Jianquan Yao
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.027953
Subject(s) - energy conversion efficiency , optical parametric oscillator , optics , coupling (piping) , physics , power (physics) , signal (programming language) , continuous wave , materials science , optoelectronics , laser , quantum mechanics , computer science , metallurgy , programming language
We report herein the enhancement in both power and efficiency performance of a continuous-wave intra-cavity singly resonant optical parametric oscillator (ICSRO) by introducing finite resonant wave output coupling. While coupling out the resonant wave to useful output, the output coupling increases the SRO threshold properly thus suppresses the back-conversion under high pump power. Therefore, the down-conversion efficiency is maintained under high pump without having to raise the threshold by defocusing. With a T = 9.6% signal wave output coupler used, the SRO threshold is 2.46 W and the down-conversion efficiency is 72.9% under the maximum pump power of 21.4 W. 1.43 W idler power at 3.66 μm and 5.03 W signal power at 1.5 μm are obtained, corresponding to a total extraction efficiency of 30.2%. The resonant wave out coupling significantly levels up the upper limit for the power range where the ICSRO exhibits high efficiency, without impeding its advantage of low threshold.