High-power Yb:YAG thin-rod amplifier for use in a regenerative amplifier based on dual-slab Yb:KGW crystals. (29th April 2021)

• Record Type: Journal Article
• Authors: Lee, Byunghak; Jeong, Bosu; Kim, Jun Wan; Sall, Elena G; Kim, Chur; Park, Seolwon; Heo, Duchang; Chizhov, Sergey A; Yang, Juhee; Yashin, Vladimir E; Kim, Guang-Hoon
• Is Part Of: Laser physics. Volume 31:Number 6(2021)
• Publication Date: 2021-04-29
• Subjects: Yb:KGW -- Yb:YAG -- regenerative amplifier -- thin rod -- femtosecond pulses -- hybrid amplification -- chirped pulse amplification; Lasers -- Periodicals; 621.36605
• DOI: 10.1088/1555-6611/abf565
• Languages: English
• ISSNs: 1054-660X

Abstract

Abstract: 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.