Abstract
Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea(Received 1 February 2010, in final form 10 July 2010)Using stimulated Brillouin scattering phase conjugate mirrors (SBS-PCMs), we conducted a co-herent beam combination of wavefront-divided beams. “Self-phase-controlled” SBS-PCMs wereused to lock and control the phases of the SBS wave. Using an interferometer, we monitored therelative phase differences of the four spatially divided beams in real time. With long-term phasestabilization, the phase differences between the reference beam and the other three beams were wellstabilized at standard deviations of λ/36.3, λ/35.8, and λ/43.4 for a duration of 2500 shots (250 s).
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