高效高功率腔内三倍频紫外激光器  

Intra-Cavity Triple Frequency Ultraviolet Laser with High Power and High Efficiency

作　　者：熊景平[1] 钱金宁 陈日升[1] 

机构地区：[1]核工业理化工程研究院,天津300180

出　　处：《激光与光电子学进展》2015年第7期149-153,共5页Laser & Optoelectronics Progress

基　　金：中核集团青年科技创新团队项目(2013年)

摘　　要：报道了一台高效高功率的腔内三倍频355 nm紫外激光器。倍频与和频均采用II类相位匹配方式。选择谐波的偏振方向以提高1064 nm基频光到355 nm三倍频光的转换效率。在一个简单的线性谐振腔中,采用一个激光二极管侧面抽运的Nd∶YAG的模块,双声光Q开关进行调制,以两块LBO晶体分别作为倍频晶体与和频晶体。在10 k Hz重复频率下,当抽运光功率约为623 W时,获得最大输出功率为51.5 W的355 nm激光,脉冲宽度为36.5 ns,光-光转换效率大于8%。测得x与y方向的光束质量因子分别为M2x=10.89,M2y=12.32。A intra-cavity tripe frequency 355 nm ultraviolet laser with high power and high efficiency is reported. Type-II phase matching is used both in second harmonic generation and third harmonic generation. Polarization states of harmonic lasers are selected to improve the conversion efficiency from the fundamental laser at 1064 nm to the third harmonic laser at 355 nm. A simple linear resonance cavity is composed of a laser diode side-pumped Nd： YAG module, two acousto-optic Q-switches, two LBO crystals separately as a second harmonic generator and a third harmonic generator. A maximum output power at 355 nm of 51.5 W is obtained at repetition rate of 10 kHz under the optical pump power of 623 W. The corresponding pulse width is 36.5 ns at 355 nm, the optical-optical effiency is more than 8%. The measured beam quality factor in x and y-directions are M2 =10.89, M2 =12.32, respectively.

关 键 词：激光器 紫外激光器 三倍频 355 NM LBO 

分 类 号：TN248.1[电子电信—物理电子学]