激光二极管侧面抽运千赫兹皮秒激光再生放大器的热特性

研究增益介质、电光晶体在高重复频率运转条件下,其热效应对皮秒激光再生放大器的影响。对Nd∶YAG激光晶体热致退偏和KD*P电光晶体热吸收进行了测量,利用补偿元件有效地补偿了激光晶体的热致退偏,并自行设计了采用BBO电光晶体的再生放大器普克尔盒,实现了对皮秒激光脉冲的有效放大,获得了在1 kHz重复频率下单脉冲能量为3 mJ,放大倍数为3×106的激光二极管(LD)侧面抽运Nd∶YAG千赫兹皮秒再生放大1064 nm激光输出。

Abstract

The influence of heat effect produced by gain medium and electro-optic crystal working at high repetition rate on a regenerative amplifier is investigated in this paper. Depolarization loss induced by heat generated in Nd∶YAG crystal and thermal absorption of KD*P electro-optic crystal were measured,and a compensating element to compensate the loss of thermal depolarization was used effectively. A BBO Pockel cell for regenerative amplifier was designed by ourself,and effective amplification is obtained. An output pulse energy at 1064 nm is obtained from the picosecond laser pulse regenerative amplifier by laser diode (LD) side-pumped with 3 mJ each pulse and amplification radio of 3×106 at 1 kHz repetition rate.

参考文献

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常亮, 陈檬, 李港, 麻云凤, 樊仲维, 牛岗, 余锦, 刘洋, 张雪. 激光二极管侧面抽运千赫兹皮秒激光再生放大器的热特性[J]. 中国激光, 2010, 37(3): 873. Chang Liang, Chen Meng, Li Gang, Ma Yunfeng, Fan Zhongwei, Niu Gang, Yu Jin, Liu Yang, Zhang Xue. Thermal Characteristic Analysis of Laser Diode Side-Pumped Regenerative Amplifier for kHz Picosecond Laser[J]. Chinese Journal of Lasers, 2010, 37(3): 873.

激光二极管侧面抽运千赫兹皮秒激光再生放大器的热特性

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