Coherent combining and phase locking of fiber lasers

This chapter presents some of the recent developments on fiber lasers. It describes the configurations and also presents the results of investigations on passive phase locking and coherent combining with a small number of fiber lasers. The chapter deals with phase locking and coherent combining of two fiber lasers, and then of four fiber lasers arranged in a two-dimensional array. It also discusses investigations and results about the effects of amplitude dynamics, noise, longitudinal modes, and time-delayed coupling on phase locking and coherent combining with two fiber lasers. The chapter explains the developments, investigations, and results on upscaling the number of lasers that can be passively phase locked and combined.