基于自适应桶中功率评价函数的光纤放大器相干合成实验研究  

Experimental study on coherent beam combination of fiber amplifiers using adaptive power-in-the-bucket cost function

作　　者：耿超[1,2] 罗文[1,2] 谭毅[1,2] 刘红梅[1,2] 牟进博[1,2] 李新阳[1,2] 

机构地区：[1]中国科学院自适应光学重点实验室,成都610209 [2]中国科学院光电技术研究所,成都610209

出　　处：《物理学报》2013年第22期180-186,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61205069;61138007)资助的课题~~

摘　　要：光纤激光光束合成技术被公认为是实现高亮度、高光束质量激光束的优秀方法,而激光阵列间的倾斜像差是影响合成效果的重要因素.针对当前光束合成中存在的倾斜校正量受限问题,提出了基于自适应桶中功率(PIB)评价函数的倾斜控制策略.搭建了两路2 W光纤放大器的相干合成实验平台,利用自制的压电环光纤相位调制器和自适应光纤准直器分别实现锁相和倾斜像差校正,验证了基于自适应PIB的倾斜控制策略的可行性,并实现了相干合成.Beam combination （BC） of fiber amplifiers based on master-oscillator-power-amplifier configuration is an outstanding way to generate high power and high beam quality laser output, where the tip/tilt aberrations among beamlets are considered as a serious influence factor to BC effects. In this paper, a new tip/tilt control method based on adaptive power-in-the-bucket （PIB） cost function is proposed to solve the problem of restricted tip/tilt correcting value in current BC systems. Experimental setup of coherent BC of two-channel2W fiber amplifier array is established. Home-made piezoelectric-ring fiber-optic phase-modulator and adaptive fiber-optics collimator are employed to correct piston-and tip/tilt-type aberrations, respectively. The feasibility of proposed tip/tilt control method using adaptive-PIB is demonstrated and nice effect of coherent BC is achieved.

关 键 词：光纤激光阵列 倾斜控制 自适应桶中功率 相干合成 

分 类 号：TN722[电子电信—电路与系统]