A novel technique has been demonstrated for increasing the efficiency of bulk wave Bragg devices. The technique consists of returning the undeflected Io beam through the sound wave a multiplicity of times, allowing a series of acousto/optic interactions which contribute to the overall deflection efficiency of the Bragg cell. This technique has been demonstrated both with experimental benchtop assemblies and in monolithic form with 3-5dB improvements in deflected optical power. Research results, tradeoffs, and conclusions are discussed.
"New Concepts For Bragg Cell Efficiency Improvement", Proc. SPIE 0464, Solid-State Optical Control Devices, (23 May 1984); doi: 10.1117/12.966224; https://doi.org/10.1117/12.966224