基于偏振锁相的双光束相干合成

Coherent Combining of Two Beams Based on Polarization Phase Locking

多路光束的相干合成是获得高功率、高亮度激光输出的有效途径。实验采用一种新型的偏振锁相技术,实现了对偏振方向相互垂直的两路光束的相位锁定和相干合成。研究表明该偏振锁相装置可将两束光的相位差锁定于0～2π之间的任意值且在较大振幅比情况下仍可获得大于90%的合束效率,是一种可定标放大的相干合成技术。

Coherent combining of laser arrays is an important technique in realizing high power high brightness laser system. The coherent combining of two orthogonal polarized lasers is achieved by using polarization phase locking technique. Experimental results show that this scheme can achieve above 90 % combining efficiency even when the power of the two lasers is highly imbalanced. The combining method can be scaled to a large number of lasers.