两路双包层光纤激光器互注入锁相实验研究

Mutual injection phase-locking of two double clad fiber lasers

提出了一种利用45°半透半反分束镜和角锥反射器实现两路光纤激光器的能量相互注入,从而获得相干合成激光输出的新方法,分析了其锁相原理.在实验上成功实现了两路独立振荡双包层光纤激光器的互注入锁相输出,在远场观察到了清晰稳定的干涉条纹(可见度约0.57),获得了超过10W的相干合成激光输出,功率合成效率约为76%.实验表明,这种互注入锁相方法可以在更高功率条件下运行,是光纤激光相干合成领域一种有前途的新技术.

A novel mutual injection phase-locking fiber laser combining technique is proposed, based on a corner-cube and a beam splitter with reflectivity of 50% at 45%, and the mutual injection phase-locking principle is introduced. Mutual injection phaselocking of two individual double clad fiber lasers is experimentally realized, steady interference stripes with high contrast ratio （about 0.57）are observed and more than 10 W output power is obtained, which indicates that the power combining efficiency is 76% . Successful attempts of phase lock show that this mutual injection-locking method is a promising technology in the field of fiber laser coherent and the output power can be further sealed.