光学学报, 2001, 21 (4): 394, 网络出版: 2006-08-10
双波长双脉冲激光三次谐波的产生方法
Method for Third Harmonic Generation of Double Wavelength and Double Pulse Laser
三次谐波 双波长双脉冲激光 相位匹配 third harmonic generation double wavelength and double pulse laser phase matching
摘要
提出双波长双脉冲激光产生三次谐波的方法。波长不同的两脉冲激光束由反射使它们合拢后通过两块非线性的BBO晶体,激光脉冲第一次通过BBO晶体产生两波长的二次谐波(SHG),它们由各自的反射镜反射再次通过BBO又产生了二次谐波,这两次产生的二次谐波和基波通过用于产生三次谐波的BBO晶体可产生双波长的三次谐波,它们由45°斜置的耦合镜输出。文中分析了满足二次谐波和三次谐波的四个相位匹配的条件,该方法也可用于腔内双波长双脉冲的三次谐波激光的产生,给出了相应的实验结果。
Abstract
The method for third harmonic generation of double wavelength and double pulse laser is proposed. Two pulsed laser beams with different wavelengths are reflected to make them near close and passing through two BBO crystals. Two wavelength second harmonics (SH) of laser pulses are generated after two times passing through the BBO of SHG. SHs and laser fundamental waves pass through the BBO of third harmonic generation (THG) to obtain two wavelength THGs, and couple out by 45° output mirror. The four phase matching conditions are analyzed to be satisfied in SHG and THG. This method can be used to intracavity THG of double wavelength and double pulse laser. The corresponding experimental results are given.
谢建平, 陈长水, 王佩琳, 吴云霞, 孙晓红, 明海. 双波长双脉冲激光三次谐波的产生方法[J]. 光学学报, 2001, 21(4): 394. 谢建平, 陈长水, 王佩琳, 吴云霞, 孙晓红, 明海. Method for Third Harmonic Generation of Double Wavelength and Double Pulse Laser[J]. Acta Optica Sinica, 2001, 21(4): 394.