We describe a phase-conjugate interferometer that consists of a partially transmitting conventional mirror placed in front of and in close proximity to a phase-conjugate mirror. The interferometer is self-referencing, compact, and insensitive to environmental disturbances, provides twice the sensitivity of conventional (nonphase-conjugate) interferometers, and produces a direct representation of an incident wave front. We have constructed such a device using internally self-pumped phase conjugation in barium titanate and have used the device to characterize the wave front produced by an aberrated optical system.
© 1989 Optical Society of America
Daniel J. Gauthier, Robert W. Boyd, Robert K. Jungquist, Jerold B. Lisson, and Laurie Lyon Voci, "Phase-conjugate Fizeau interferometer," Opt. Lett. 14, 323-325 (1989)