摘要
提出了利用模拟退火算法实现相干合成的思路。对利用模拟退火算法实现多路光纤放大器相干合成进行了数值模拟,验证了方法的有效性,并分析了算法收敛速度与合成光束数目的关系。进行了两路W量级光纤放大器相干合成的实验,结果表明,模拟退火算法能够有效控制各路光纤激光的相位,系统闭环将目标圆孔内的能量提高了1.8倍,并使得目标圆孔内能量大于理想值80%的概率从19.4%提升到了51.3%,取得了较为明显的相干合成效果。
This paper proposes the novel concept of coherent beam combining using stimulated annealing algorithm.Numerical simulation on coherent beam combining of multiple fiber amplifiers is carried out;the dependence of convergence rate on laser numbers is analyzed.Coherent beam combining of two watt-level fiber amplifiers is experimentally achieved.Experimental result shows that the whole system in close-loop performs well for long-time observation.The average energy encircled in the target pinhole is 1.8 times higher thau that in the case of open-loop.The probability of energy encircled in the main-lobe to be more than 80% of its ideal value is increased from 19.4% to 51.3% when the system evolves from open-loop to close-loop.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2010年第5期973-977,共5页
High Power Laser and Particle Beams
基金
国防科技大学研究生创新资助课题(B070701)
关键词
光纤放大器
相干合成
模拟退火算法
主动相位控制
随机并行梯度下降算法
fiber amplifier
coherent beam combining
stimulated annealing algorithm
active phase control
stochastic parallel gradient descent algorithm
