Coherent beam combining of hybrid phase control in master oscillator-power amplifier configuration |
| |
| Authors: | Wang Xiao-Lin Zhou Pu Ma Yan-Xing Ma Hao-Tong Xu Xiao-Jun Liu Ze-Jin and Zhao Yi-Jun |
| |
| Affiliation: | College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China |
| |
| Abstract: | A novel scalable architecture for coherent beam combining with hybrid phase control involving passive phasing and active phasing in master oscillator-power amplifier configuration is presented. Wide-linewidth mutually injected passive phasing fibre laser arrays serve as master oscillators for the power amplifiers, and the active phasing using stochastic parallel gradient descent algorithm is induced. Wide-linewidth seed laser can suppress the stimulated Brillouin scattering effectively and improve the output power of the fibre laser amplifier, while hybrid phase control provides a robust way for in-phase mode coherent beam combining simultaneously. Experiment is performed by active phasing fibre laser amplifiers with passive phasing fibre ring laser array seed lasers. Power encircled in the main-lobe increases1.57 times and long-exposure fringe contrast is obtained to be 78% when the system evolves from passive phasing to hybrid phasing. |
| |
| Keywords: | fibre laser coherent beam combining hybrid phase control stochastic parallel gradient descent algorithm |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
|
点击此处可从《中国物理 B》下载免费的PDF全文 |
