We demonstrate that a nonlinear directional coupler with special bending of waveguide axes can be used for all-optical switching of polychromatic light with a very broad spectrum covering all of the visible region. The bandwidth of the suggested device is enhanced five times compared with conventional couplers. Our results suggest novel opportunities for the creation of all-optical logical gates and switches for polychromatic light with white-light and supercontinuum spectra.
© 2007 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: September 21, 2006
Manuscript Accepted: November 21, 2006
Published: February 2, 2007
Ivan L. Garanovich and Andrey A. Sukhorukov, "Nonlinear directional coupler for polychromatic light," Opt. Lett. 32, 475-477 (2007)