Abstract
We demonstrate, to the best of our knowledge, the first double-pass pre-chirp managed fiber amplifier. The double-pass fiber amplifier exhibits high gain allowing us to amplify chirped picosecond pulses from 20 mW to 113 W in a rod-type Yb-fiber corresponding to 38 dB gain. We study the dependence of static mode degradation (SMD) on the nonlinear phase shift (NPS) accumulated by the amplified pulse. Our results indicate that a larger nonlinear phase shift results in stronger nonlinear polarization evolution of the fundamental mode and leads to a lower threshold for SMD. After optimization, our pre-chirp managed amplifier seeded by 80 mW pulses delivers 102 W amplified power from the main output. The amplified pulses are compressed to 37 (55) fs with 90 (100) W average power by a grating pair (chirped mirrors). The double-pass configuration significantly simplifies the implementation of pre-chirp managed fiber amplifiers leading to an extremely compact system.
© 2021 Optical Society of America
Full Article | PDF ArticleMore Like This
Kong Gao, Yizhou Liu, Wenchao Qiao, Rong Xu, Tianli Feng, Hongwen Xuan, Dechun Li, Xian Zhao, Aimin Wang, and Tao Li
Opt. Lett. 47(19) 5016-5019 (2022)
Yao Zhang, Runzhi Chen, Hangdong Huang, Yizhou Liu, Hao Teng, Shaobo Fang, Wei Liu, Franz Kaertner, Junli Wang, Guoqing Chang, and Zhiyi Wei
OSA Continuum 3(7) 1988-1998 (2020)
Wei Liu, Damian N. Schimpf, Tino Eidam, Jens Limpert, Andreas Tünnermann, Franz X. Kärtner, and Guoqing Chang
Opt. Lett. 40(2) 151-154 (2015)