角锥腔互注入锁相光纤激光器

Mutual-Injection Phase-Locking Fiber Laser with Corner-Cube Cavity

提出一种基于角锥互注入锁相的多路光纤激光器相干合成新技术,分析了其锁相原理,设计了基于球面角锥和平面角锥的两种多光束光纤激光器相干合成方案。开展了基于平面角锥互注入锁相的两路光纤激光器的相干合成实验,成功实现了两路独立光纤激光器的注入锁定,观察到波长锁定(中心波长稳定在1085.22 nm)、远场干涉条纹(可见度约0.5)、线宽压缩(44%)和功率合成效率大于1(120%)等现象,获得了超过2.4 W的相干合成激光输出。在两路光纤激光器不同功率比例注入条件下,研究了波长漂移的规律,得到了波长漂移量与注入功率成反比的定性规律。

A novel mutual-injection phase-locking fiber laser combination technology based on corner-cuber was proposed. The phase locking principle was theoretically analyzed and two coherent combination schemes respectively utilizing spherical corner-cuber and planar corner-cuber were introduced. The mutual injection phase-locking coherent combination experiment of two fiber lasers based on planar corner-cuber was demonstrated, and the locked wavelength centered at 1085.22 nm, the steady interference strips with visibility about 0. 5 and the line-width of compression of 44% are experimentally observed. The combined output power is more than 2.4 W with a power combination efficiency of 120%. The relationship between the wavlength shift and the injecting power is found to be in the inverse proportion pattern for two fiber lasers with different injecting power ratio.