Optical mixing of waves separated in frequency by many gigahertz can be accomplished by allowing the waves to mix in a nonlinear medium to generate microwave difference frequencies. This basis for high-bandwidth optical mixers is demonstrated by mixing optical frequencies ~4 GHz apart of a pulsed dye-laser beam at ~660 nm in a LiTaO3 crystal to produce readily detectable microwave power at ~4 GHz.
© 1984 Optical Society of America
Original Manuscript: November 23, 1983
Manuscript Accepted: January 13, 1984
Published: April 1, 1984
N. H. Tran, J. P. Watjen, G. C. Bjorklund, R. Kachru, and T. F. Gallagher, "Generation of microwaves by mixing two optical frequencies in a nonlinear crystal: a novel approach to high-bandwidth optical mixers," Opt. Lett. 9, 128-130 (1984)