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提出了全固态双共振KTPⅡ类相位匹配腔内和频连续波578nm黄光激光器,利用两种增益介质Yb…YAG和Nd…YAG分别得到1030nm和1319nm基频谱线,通过KTPⅡ类临界相位匹配进行腔内和频实现了578nm黄激光输出。实验中输出578nm黄激光,同时输出582nm和频光成分。通过光谱分析,该现象是由于Nd…YAG晶体中对应能级跃迁为R_2→X_3的1338nm谱线起振,并与1030nm谱线产生了和频作用。当Yb…YAG和Nd…YAG的抽运功率分别为10.3 W和3.7 W时,得到55mW的黄激光输出,并且在30min内的功率稳定性优于4.7%。利用格兰棱镜测量了基频光与和频光的偏振特性,结果表明,对于两个各向同性的激光晶体而言,谐振腔结构以及和频晶体的方位角均影响其相应基频光的偏振特性,两者均可使基频光的偏振方向向有利于和频作用的偏振方向改变。
An all-solid-state double-resonance KTPⅡphase-matching intracavity and frequency continuous wave 578nm yellow laser was proposed. The fundamental frequency spectra of 1030nm and 1319nm were obtained by using two gain media Yb ... YAG and Nd ... YAG respectively. Intra and Harmo 578nm yellow laser output. Experimental output 578nm yellow laser, while the output 582nm and frequency of light components. By spectroscopic analysis, this phenomenon is due to the 1338 nm line in the Nd ... YAG crystal corresponding to the transition of level R_2 → X_3 and generating the sum frequency effect with the 1030 nm line. When the pumping powers of Yb ... YAG and Nd ... YAG are 10.3 W and 3.7 W respectively, a yellow laser output of 55 mW is obtained, and the power stability is better than 4.7% within 30 min. The polarization characteristics of fundamental frequency light and sum frequency light were measured by using the Prism prism. The results show that for both isotropic laser crystals, the resonator structure and the azimuth angle of the frequency crystal all affect the corresponding fundamental frequency light Polarization characteristics, both of which allow the polarization direction of the fundamental frequency light to be changed toward the polarization direction that favors the sum frequency.