全固态腔内SHG/SFG多波长黄光激光器

All-Solid-State Multi-Wavelength Yellow Laser Intra-Cavity SHG/SFG

报道了一种利用大功率激光二极管端面抽运Nd…YAG激光晶体产生基频光,并通过非线性晶体的腔内倍频(SHG)与和频(SFG),实现多个二次谐波同时连续输出的多波长黄光激光器。将Nd…YAG晶体的1112.1、1115.9、1122.7nm谱线作为基频光,利用LBO和BIBO进行非线性光学频率变换,同时获得了三个倍频光及三个和频光激光输出。从理论上对基频光同时受激跃迁和非线性频率变换相位匹配进行了分析。实验结果与理论分析表明,当基频光的性能相对接近时,合理地选择性能较好的非线性晶体对基频光同时进行倍频和和频是获得全固态多波长激光器的一种实用方法,合理地设计激光器谐振腔能够提高激光器的稳定性。

With the use of fundamental wave of high power laser diode end-pumped Nd： ~AG and the intra-cavity second-harmonic generation （SHG） effect and sum-frequency generation （SFG） effect of nonlinear optical crystal, a multi-wavelength yellow laser with simultaneous multi-second-harmonic outputs is proposed. By using 1112.1, 1115. 9, 1122.7 nm outputs of Nd： YAG as fundamental waves, and selecting LBO and BIBO for nonlinear frequency conversion, three SHG lights and three SFG lights are obtained at the same time. The simultaneous stimulated transition of fundamental frequency lights and the phase matching nonlinear frequency conversion are analyzed theoretically. Experimental results and theoretical analysis show that when fundamental wavesr performances are relatively close to each other, reasonably choosing nonlinear crystals with good performance for frequency doubling and sum frequency of wavelengths at the same time is a practical method to realize all-solid-state multi-wavelength laser. Reasonably designing laser resonator can improve the stability of the laser.