摘要
基于周期极化晶体的Sell meier方程和准相位匹配理论,对准相位匹配光参变振荡器的调谐特性进行了理论分析.通过数值模拟计算,得到了PPRTA晶体光参变振荡的调谐特性与极化反转光栅周期、晶体温度和抽运光波长等参量的关系曲线.并且与PPKTP晶体和PPLN晶体光参变振荡器的调谐特性进行了比较,研究了三者的不同之处,得出了PPRTA晶体的参量调谐特性优于PPKTP晶体和PPLN晶体的结论,与国外已报道的实验数据相吻合.证实了PPRTA晶体是一种可以产生可调谐近中红外光的理想准相位匹配非线性光学晶体.
The wavelength tenability of QPM-OPOs has been theoretically analyzed based on the Sellmeier equation of periodically poled crystals and the QPM theory. Furthermore,tuning curves of PPRTA, PPKTP and PPLN OPOs, including polar inversion grating period tuning,temperature tuning and pump wavelength tuning,etc, have been calculated and compared. By comparison with PPKTP and PPLN crystals,parametric tuning characteristics of PPRTA crystal have been superior to that of PPKTP and PPLN crystals. The numerical simulations agree with the experimental data reported by foreign researchers. Therefore,PPRTA crystal has been approved to be an ideal QPM nonlinear material generating tunable midinfrared coherent radiation.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2007年第8期1495-1499,共5页
Acta Photonica Sinica
基金
北京市自然科学基金(4062008)资助
关键词
非线性光学
光学参变振荡器
准相位匹配
周期极化晶体
调谐特性
Nonlinear optics
Optical parametric oscillator~ Quasi-phase-matching
Periodically poled crystal
Tuning characteristics
