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Summary form only given. We show that one can modify a multi-pass amplifier scheme to provide phase conjugate beam steering over a useful angular range. Experiments demonstrate a scalable architecture in which phase conjugate beam control provides a method for manipulating high power beams using components designed for low power operation.

Summary form only given.If one wishes to extract energy from an amplifier one usually requires substantial input energies, and the net gain is modest. Gain and energy extraction can be improved by double passing an amplifier system, often using nonlinear optical phase conjugation to compensate for aberrations. In amplifier systems it is often convenient to use relay imaging, using an intermediate telescope. In this paper we introduce an optical element to intercept beams propagating in a self-imaging system and introduce an angle multiplexing arrangement. This makes it possible to pass a beam through an amplifier many times. The technique is generic and applicable to a variety of laser amplifiers.