High-power Yb:YAG thin-rod amplifier for use in a regenerative amplifier based on dual-slab Yb:KGW crystals

被引：7
作者：
Lee, Byunghak [1 ]
Jeong, Bosu [1 ]
Kim, Jun Wan [1 ]
Sall, Elena G. [1 ]
Kim, Chur [1 ]
Park, Seolwon [1 ]
Heo, Duchang [1 ]
Chizhov, Sergey A. [1 ]
Yang, Juhee [1 ]
Yashin, Vladimir E. [2 ]
Kim, Guang-Hoon [1 ]
机构：
[1] Korea Electrotechnol Res Inst, Electromed Device Res Ctr, Ansan 15588, South Korea
[2] ITMO Univ, Fac Photon & Optoinformat, Kronversky Pr 49, St Petersburg 197101, Russia
来源：
LASER PHYSICS | 2021年 / 31卷 / 06期
关键词：
Yb:KGW; Yb:YAG; regenerative amplifier; thin rod; femtosecond pulses; hybrid amplification; chirped pulse amplification;
D O I：
10.1088/1555-6611/abf565
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a hybrid chirped pulse amplification femtosecond laser amplification system with which to realize a Yb:KGW regenerative amplifier (RGA) and a Yb:YAG thin-rod amplifier. The combination of RGA based on dual Yb:KGW crystals and a thin-rod Yb:YAG amplifier with a high gain brings about output power up to 46 W before and 29.2 W after pulse compression down to 277 fs at a repetition rate of 200 kHz. The gain-narrowing effect was complemented by a combination of different types of gain-medium amplification. The results show that the output power of a Yb:KGW-based amplifier can be amplified simply by using a Yb:YAG thin-rod amplifier while suppressing the broadening of the pulse duration by gain narrowing.
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页数：5
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