A Brillouin-enhanced four-wave mixing phase conjugator featuring a field of view that varies by approximately an order of magnitude, i.e., from 2 to 20 mrad, is described. We control this variable field of view by utilizing a slightly noncollinear pumping geometry and by adjusting the pump-pump frequency difference to optimize the phase mismatch for the overall process. A model that describes the interplay between frequency and geometry to the Brillouin-enhanced four-wave-mixing phase mismatch is found to predict the expandable field of view.
© 1994 Optical Society of America
John R. Ackerman and Paul S. Lebow, "Optimization of the field of view of a Brillouin-enhanced four-wave-mixing phase conjugator," Opt. Lett. 19, 2015-2017 (1994)