We propose a novel device that exhibits nonreciprocity in optical reflection or transmission. The device is formed by two frequency-doubling crystals and a suitable dichroic mirror or a filter. The nonreciprocity may exceed 100 and be accompanied by nonlinear reflection or transmission. Applications in unidirectional and mode-locked lasers are discussed.
© 1992 Optical Society of America
Krassimir A. Stankov, Velko P. Tzolov, and Mirko G. Mirkov, "Nonreciprocal optical device based on second-harmonic generation," Appl. Opt. 31, 5003-5009 (1992)