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104W内腔倍频全固态Nd∶YAG绿光激光器 被引量:21

104 W Laser Diode-Pumped Intracavity Frequency-Doubled Nd∶YAG Green Light Laser
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摘要 报道了一台高功率内腔倍频全固态Nd∶YAG绿光激光器 ,针对KTP晶体热效应和激光热稳定腔 ,采取了对KTP晶体进行低温冷却的优化措施 ,以便减少KTP晶体的热效应导致的相位失配 ,同时兼顾了Nd∶YAG棒的热致双折射效应和KTP晶体热透镜效应 ,设计了热稳定谐振腔 ;实验中采用 80个 2 0W激光二极管阵列侧面抽运Nd∶YAG棒和Ⅱ类相位匹配KTP晶体 (在 2 7℃时相位匹配角为 =2 3.6° ;θ =90° ,尺寸为 7mm× 7mm× 10mm)内腔倍频技术 ,谐振腔腔长为 5 30mm ,KTP晶体的冷却温度为 4 .3℃ ,抽运电流为 18.3A时 ,实现平均功率达 10 4W、脉冲宽度为 130ns的 5 32nm激光输出 ;其重复频率为 2 0 .7kHz。光光转换效率为 10 .2 %。 An average 104 W green beam operation by intracavity frequency doubling of Nd:YAG laser, which is pumped by eighty 20 W high\|power laser diodes is reported. A type Ⅱ phase matched KTP crystal ( =23.6°,θ=90° under the condition of 27 ℃,its size is 7 mm×7 mm× 10 mm) is applied for frequency doubling of Nd∶YAG laser. The length of resonator is 530 mm. The KTP crystal is placed in the special cooling device. Under the pumping current of 18.3 A, KTP crystal is cooled to 4.5 ℃. A maximum green power of 104 W was generated at 20.7 kHz repetition rate and 132 ns pulse width when pumping current of laser diodes is 18.3 A, leading to 10.2% of optical-optical conversion efficiency.
出处 《光学学报》 EI CAS CSCD 北大核心 2004年第7期925-928,共4页 Acta Optica Sinica
基金 国家 8 6 3计划 (2 0 0 2AA311190 ) 教育部天津大学科技项目 教育部南开大学科技项目 天津市光电子联合科学研究中心项目(0 13184 0 11)资助课题
关键词 激光器 ND:YAG激光器 532 nm绿光 KTP晶体 内腔倍频 低温冷却 lasers Nd∶YAG laser green beam at 532 nm KTP crystal intracavity frequency doubling strong cooling
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