PHASE MODULATION TECHNIQUE FOR PERFORMING ACOUSTO-OPTIC INTENSITY MODULATION OF OPTICAL WAVEFRONT

摘要

PROBLEM TO BE SOLVED: To provide a phase modulation technique for performing acousto-optic intensity modulation of an optical wavefront.;SOLUTION: An acousto-optic modulator comprises: an acousto-optic bulk medium; and a transducer attached to the acousto-optic bulk medium and formed as a linear array of electrodes. A transducer driver is connected to each electrode. Each electrode is coherently phase driven so as to alter angular momentum distribution of an acoustic field, alternately allow and inhibit phase matching between an optical field and the acoustic field, and produce desired intensity modulation of an optical wavefront.;COPYRIGHT: (C)2013,JPO&INPIT