High-energy dual-crystal Yb:CaGdAlO 4 regenerative amplifier delivering 112 GW peak power at a 1 kHz repetition rate
Year: 2025
Type: article
Abstract: We demonstrate a Yb:CaGdAlO 4 (Yb:CALGO) bulk regenerative amplifier (RA) capable of delivering a peak power of 0.112 TW at a 1 kHz repetition rate. By integrating a home-built ultrabroadband nonlinear polarization evolution (NPE) mode-locked fiber oscillator, a set of custom-designed spectral shapers and the broad emission bandwidth Yb:CALGO gain medium, an amplified bandwidth of 18.2 nm and an output pulse duration of 137 fs are achieved. Thanks to the thermally insensitive dual-crystal cavity design and the quasi-continuous pumping thermal management scheme, the RA achieves a maximum pulse energy output of 21.01 mJ. Under the constraint of avoiding crystal damage, the compressed pulse energy reaches 17.6 mJ. To the best of our knowledge, this represents the highest pulse energy and peak power ever achieved from a Yb:CALGO RA. The power stability over 30 minutes is measured to be 0.506%, and the beam quality factor M 2 is 1.16 × 1.12.
Authors: Tianze Xu, Jiajun Song, Yujie Peng, Guanguang Gao, Liya Shen, Yinfei Liu, Junze Zhu, Yuxin Leng
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,900
Funders: National Natural Science Foundation of China, Chinese Academy of Sciences, China Postdoctoral Science Foundation, Youth Innovation Promotion Association of the Chinese Academy of Sciences, Shanghai Rising-Star Program, Chinese Academy of Sciences, Shanghai Branch, National Key Research and Development Program of China, Youth Innovation Promotion Association
OpenAlex ID: W4414356474