Five-channel Bragg splitter

A five-channel splitter of a new type is discussed. In this splitter, normal optical modes of monochromatic light interact simultaneously with two acoustic waves. These two waves are orthogonal with respect to each other and differ in frequency. Experiments reveal a splitting at transverse sound frequencies of 20.1, 16, and 13.5 MHz at light wavelengths of 488, 514, and 633 nm, respectively, in a TeO₂ single crystal.