紧凑型激光二极管端面抽运Nd:YVO_4内腔三倍频355nm紫外激光器  

Compact LD End-Pumped Nd:YVO_4 Intracavity Frequency-Tripled 355 nm Laser

作　　者：刘欢[1] 巩马理[1] 

机构地区：[1]清华大学精密仪器与机械学系光子与电子技术研究中心,北京100084

出　　处：《中国激光》2009年第6期1341-1346,共6页Chinese Journal of Lasers

摘　　要：报道了一台激光二极管(LD)端面抽运Nd∶YVO_4晶体,利用两块LBO晶体进行内腔二倍频和二倍频,实现了高效率、高峰值功率355 nm激光准连续输出的紧凑型全固态紫外激光器。激光腔采用简单平平直腔,腔长仅108 mm。当注入抽运功率6.76 W,重复频率20 kHz时,355 nm激光输出平均功率最高达245 mW,相应的光光转换效率为3.62%,脉冲宽度为8.0 ns,脉冲峰值功率为1.52 kW,输出功率短期不稳定性小于4.2%,光束质量良好。通过采用内腔倍频技术和设计合理的腔结构,整台激光器结构紧凑,体积小巧,便携性强,适合于中小功率紫外激光的输出,有利于进一步拓宽紫外激光器的应用领域。A laser diode-end-pumped Nd ： YVO4 intracavity frequency-tripled quasi-continuous 355 am laser has been demonstrated. The efficient second and third-harmonic generation with the high peak power and stable operation is generated by two lithium triborate （LBO） crystals. The laser cavity is a simple plane-to-plane linear cavity with the cavity length of 108 mm. An average 355 nm laser with output power of 245 mW is obtained at a pump power of 6.76 W, a pulse repetition rate of 20 kHz and the highest optical-to-optical efficiency of 3.62 %. The corresponding pulse width and pulse peak power are 8,0 ns and 1, 52 kW, respectively. The instability is less than 4.2 % and the beam quality is satisfactory. This technique can decrease some optical elements reduce the size and enhance the handiness of the laser, These advantages will benefit the broad applications of the ultraviolet lasers.

关 键 词：激光器 激光二极管端面抽运 内腔三倍频 声光调Q 355 nm紫外激光器 

分 类 号：TN248.1[电子电信—物理电子学]