摘要
为了获得高功率、高光束质量相干光纤激光输出,设计了一种双端输出的光纤激光器。两路光纤激光器尾端通过反射率为85%的光纤布拉格光栅连接,有一定的相互关联,利用角锥反射器使其能量相互注入,实现锁相,并利用偏振片分光,实现相干合成输出。实验上,在远场得到了清晰稳定的干涉条纹(可见度约为0.92),获得了8.6 W的相干合成激光输出,对应的功率合成效率约为90%。实验结果表明,该方案结构简单,稳定性好,相干度高,并可用于多路激光相干合成,为实现高功率光纤激光相干合成输出提供了一种新的思路。
A novel fiber laser with two output ports is designed to realize high power and high quality fiber laser coherent beam combining output.The two fiber lasers associated with each other are connected by a fiber bragg grating（FBG）（R=0.85 at 1085 nm）.Based on a corner-cube,the energy is mutual injected with each other.And by a polarizer,coherent beam combining output is realized.Through experiments,steady interference stripes with high contrast ratio（about 0.92） are observed and 8.6 W output power is achieved which indicate that the power combining efficiency is approximately 90%.This combining method can be scaled to a large number of lasers.Successful attempts of phase-locked show that this method may provide a promising way in the field of fiber laser coherent combining.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2010年第12期2964-2968,共5页
Chinese Journal of Lasers
基金
国防预研项目(51302010206)资助课题
关键词
激光技术
相干合成
关联光纤激光器
角锥
偏振片
laser technique
coherent beam combining
relating fiber laser
corner-cube
polarizer
