摘要
二极管激光器阵列端泵浦Nd:YAG板条具有热效应低、波前畸变小的特点,温度场和应力场的不均匀是引起板条增益介质波前畸变的主要原因。对端泵浦传导冷却Nd:YAG板条增益模块的泵浦和冷却均匀性进行了优化设计,获得了板条激光增益模块静态波前畸变最大偏差(PV)值为0.22μm。该模块用于双通放大器实验装置中,测试了板条增益模块有无注入功率条件下的波前畸变,测得无注入功率波前畸变PV值为3.49μm,能量提取后波前畸变PV值为3.41μm。在注入功率3120W时,获得输出激光功率4660W,光束质量为3.88倍衍射极限,该模块光光效率为27%。
The Nd：YAG slab end-pumped by laser diode arrays features small thermal effect and wavefront distortion. The theoretical analyses show that inhomogeneity of the temperature field and stress field is the main cause of wavefront distortion in the slab gain medium. For the end-pumped conduction cooled slab gain module, we optimized the pump and thermal uniformity by reasonable design and obtained the static wavefront distortion with a peak-valley （PV） value of 0.22μm. We tested the wave- front distortion of this module in the double-amplifier experiment device, deriving the PV values of 3.49 μm without the signal power injection and 0.59 μm after energy extraction. At the injection power of 3120 W, we obtained an output power of 4660 W and a beam quality value of 3.88 times the diffraction limit, with an optical-optical efficiency of 27%.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2013年第4期822-826,共5页
High Power Laser and Particle Beams
基金
国家自然科学基金项目(10904009
60890201)
关键词
板条
波前畸变
热效应
光束质量
端泵浦
slab
wavefront distortion
thermal effect
beam quality
end pumping
