A narrow-linewidth master-oscillator fiber power amplifier system was presented, in which an ultrastable, continuous-wave, single-frequency laser was adopted as the master oscillator and a China-made Yb-doped large-mode-area fiber was used as the power amplifier medium. The system generates single-frequency radiation up to 7.3 W at 1064-nm wavelength with 39% slope efficiency and 26% optical-optical power conversion efficiency. The spectral characteristics as well as the suppression of amplified spontaneous emission were discussed in detail.
© 2007 Chinese Optics Letters
Fangpei Zhang, Qihong Lou, Jun Zhou, Hongming Zhao, Jingxing Dong, Yunrong Wei, Bing He, Jinyan Li, Weibiao Chen, Jianqiang Zhu, and Zhijiang Wang, "7.3-W single-frequency master-oscillator fiber power amplifier with China-made double-clad fiber," Chin. Opt. Lett. 5, 322-324 (2007)