LDA抽运Nd:YAG／LBO单通道腔内和频589nm激光器

LDA Pumped Nd:YAG/LBO Single-pass Intra-cavity Sum-frequency Mixing Laser at 589nm

报道了一种光纤耦合激光二极管阵列(LDA)抽运Nd:YAG晶体、腔内I类临界相位匹配LBO和频、连续波输出的全固态589nm激光器的设计和实验结果。黄光激光是由Nd:YAG 晶体的1064nm和1319nm谱线腔内和频产生,其对应能级跃迁分别为4F3/2到4I11/2和4F3／2 到4I13/2。实验采用三镜腔结构,在808nm 12W的抽运功率下,获得了最高功率为384mW连续波TEM00的589nm黄光激光输出,光束质量因子M2<1．2,4h功率不稳定度小于±2％。实验结果表明采用三镜腔进行腔内和频是获得589nm黄光激光的有效方法,并可以应用到 Nd:YAG晶体的其它谱线或具有多条谱线的其它激光增益介质,获得更多不同波长激光输出。

AIt is reported that the 1064nm （^4F3/2-^4I11/2 ） and 1319nm （^4F3/2-^4I13/2） generated from a fiber-coupled laser diode array pumped Nd：YAG laser are intra-cavity sum frequency mixed in the type-Ⅰ critical phase matched LBO crystal to achieve 589nm yellow laser. By using a three-mirror cavity,with incident pump power of 12W,TEM00 mode yellow laser at 589nm of 384mW is obtained at last ,its M^2 factor is less than 1.2. The power instability is less than ± 2% within 4 h. Experimental results show that the intra-cavity sum-frequency mixing is an effective method for 589nm laser,and it can be applied to other transition wavelengths in Nd：YAG or other laser crystals to obtain more all-solid-state lasers with different wavelength.