Abstract

Valley et al.¹ demonstrated that pumping a Brillouin cell with two nearly equal beams produced a pair of phase-locked scattered beams when the foci of the pumps overlapped. The two beams were generated by a slightly misaligned Michelson interferometer with the number of fringes in the interference pattern a measure of the focal spot separation. They demonstrated phase locking by requiring that a marker wire in the interferometer output be located in the same fringe in the scattered fringe pattern. We have repeated this experiment, employing both a direct measurement of the focal spots and a different diagnostic to measure the phase locking of the two Brillouin beams.

© 1986 Optical Society of America