We propose and analyze a new type of phase conjugation between counterpropagating beams in photorefractive materials based on diffraction from transmission gratings only. This effect does not require temporal coherence between the counterpropagating beams and may occur spontaneously, with no external seeding, even with wide (frequency) band light sources.
© 1991 Optical Society of America
Original Manuscript: September 3, 1991
Published: December 15, 1991
Mordechai Segev and Amnon Yariv, "Phase conjugation involving incoherent counterpropagating beams in photorefractive media," Opt. Lett. 16, 1938-1940 (1991)