Abstract
We present a narrow linewidth, all-fiber polarization-maintained amplifier chain seeded by a phase-modulated single-frequency laser, which is a narrow linewidth. Different from previous phase-modulation techniques, the phase-modulation signal is generated by simply imposing an excited signal to an acoustic-optical driven source. Theoretical simulation results show that this method can suppress stimulated Brillouin scattering (SBS) to a better degree, and the output power can be boosted to about 1.2 kW in terms of the SBS threshold. By amplifying the phase-modulated seed based on master-oscillator power-amplification configuration in experiments, a 560 W output laser is achieved with slope efficiency of 87.2% and linewidth of . Further power scaling is limited by mode instability instead of an SBS effect. At maximal output power, the beam quality ( factor) and polarization extinction ratio is measured to be within 1.3 and 14 dB, respectively.
© 2015 Optical Society of America
Full Article | PDF ArticleMore Like This
Pengfei Ma, Rumao Tao, Rongtao Su, Xiaolin Wang, Pu Zhou, and Zejin Liu
Opt. Express 24(4) 4187-4195 (2016)
Yanshan Wang, Yinhong Sun, Wanjing Peng, Yujun Feng, Jue Wang, Yi Ma, Qingsong Gao, Rihong Zhu, and Chun Tang
Appl. Opt. 60(21) 6331-6336 (2021)
Qiuhui Chu, Pengfei Zhao, Honghuan Lin, Yu Liu, Chengyu Li, Bopeng Wang, Chao Guo, Xuan Tang, Chuanxiang Tang, and Feng Jing
Appl. Opt. 57(12) 2992-2996 (2018)