Beam Quality and Coupling Efficiency in Coherent Beam Combining

抄録

Laser beam quality (BQ) and coherent beam combining (CBC) efficiency metrics are summarized and discussed. Interrelations between laser BQ, CBC efficiency metrics and phase wavefront rms deviation (or variance) are elucidated. CBC efficiency degradation sources are discussed. Examples of CBC efficiency dependence on some misalignments like optical path mismatch and phase difference, pointing instability, aberrations as well as the number of combining beams, are presented. Total efficiency of the CBC is discussed.