光学精密工程2012，Vol.20Issue(2)：277-286,10.DOI:10.3788/OPE.20122002.0277
CO激光在非线性晶体ZnGeP2和GaSe中的混频效应
CO laser frequency mixing in nonlinear crystals ZnGeP2 and GaSe
摘要
Abstract
The CO laser frequency mixing in high-quality ZnGeP2 and GaSe crystals is studied to obtain the 2.15-1 500 μm coherent sources.Secondary Harmonic Generation(SHG),sum- and difference frequency generations are considered as a method for the CO laser frequency mixing and the mode-locking as an efficient way to improve the mixing efficiency.Results show that the internal SHG efficiency of Q-switched multiline CO laser radiation has exceeded by 0.3% for GaSe crystal and has reached by 1.1 % for ZnGeP2 crystal.When the SHG is in ZnGeP2,the internal efficiency of electron beam sustained discharge frequency-tunable mode-locking CO laser is up to 12.5 %.Simultaneous SHG and sum frequency generation show the same output spectrum.It is shown by modeling that the sum and difference frequency generations of neighboring lines of both fundamental and first overtone bands can allow one to get the oscillation,respectively,at 4.0-5.0 μm and 100-≥1 200 μm (THz).In conclusions,the frequency mixing of mode-locked CO laser emission lines in ZnGeP2 crystals allows some one to design 2.15-≥1 500 μm coherent sources with the power frequency conversion efficiency up to or over 12.5%.关键词
非线性晶体/ZnGeP2晶体/GaSe晶体/混频效应/脉冲CO激光/锁模Key words
nonlinear crystal/ZnGeP2 crystal/ GaSe crystal/ frequency conversion/ pulsed CO laser/mode-locking分类
数理科学引用本文复制引用
张来明,KOZLOV A YU,KOTKOV A A,LANSKII G V,SHAIDUKOAV,谢冀江,郭劲,陈飞,姜可,ANDREEV YU M,IONIN A A,KINYAEVSKIY I O,KLIMACHEV YU M..CO激光在非线性晶体ZnGeP2和GaSe中的混频效应[J].光学精密工程,2012,20(2):277-286,10.基金项目
Laboratory Foundation No.SKLIM090301 CIOMP and Presidium SB RAS under 30.3.2 Project of 30.3 Program （）
