Efficient phase-locking of 60 fiber lasers by stochastic parallel gradient descent algorithm

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2020,（10）
• 所属期刊栏目: Lasers and Laser Optics
• 页码范围: 43-47
• 页数: 5页
• 语种: 英文
• DOI: 10.3788/COL202018.101403

摘要

Coherent beam combining of 60 fiber lasers by using the stochastic parallel gradient descent algorithm has been demonstrated.The functions of pinhole(s) on the power distributions in the far-field have been systematically simulated on both in-phase and out-of-phase modes.Only one photoelectric detector was used to detect the combined power in the far-field central lobe of the in-phase mode state.When the phase controller was in a closed loop,the contrast of the far-field intensity pattern was as high as ～97％ with residual phase error of ～λ/30,and ～34.7％ of the total power was contained in the central lobe.