Active coherent beam combination of two high-power single-frequency nanosecond fiber amplifiers

作者：Su, Rongtao; Zhou, Pu; Wang, Xiaolin; Ma, Yanxing; Xu, Xiaojun^*

来源：Optics Letters, 2012, 37(4): 497-499.

DOI：10.1364/OL.37.000497

We report on active coherent beam combining of two single-frequency nanosecond fiber amplifiers by using stochastic parallel gradient descent algorithm. Each fiber amplifier produces an average power of more than 100W by using three-stage cascaded amplification. The two laser beams are actively phase-locked with a total average power of 215.8W, producing similar to 8 ns pulses at 10 MHz repetition rate. The contrast of the far-field intensity pattern of the coherently combined beam is more than 83%.

• 出版日期2012-2-15
• 单位中国人民解放军国防科学技术大学