Author:
Bai Chuan,Wang Geyang,Tian Wenlong,Zheng Li,Tian Xuan,Yu Yang,Zhang Dacheng,Zhu Jiangfeng,Wei Zhiyi
Abstract
We report on a four-pass femtosecond amplifier based on a Yb:CALYO crystal. The seed of 2.7 W is amplified to 20.15 W, corresponding to 19% optical-to-optical efficiency. The spectrum and the beam quality maintain well.