Title :
Nonlinear codirectional guided wave mode conversion in grating structures
Author :
Trillo, S. ; Wabnitz, S. ; Stegeman, G.I.
Author_Institution :
Fondazione Ugo Bordoni, Rome, Italy
fDate :
6/1/1988 12:00:00 AM
Abstract :
The authors discuss the operational characteristics of a new all-optical device, based on a nonlinear grating, potentially capable of all-optical switching between dissimilar waveguide modes. The use of a grating allows for a substantial reduction in switching-power requirements, still permitting complete power-dependent mode-conversion. An unexpected feature is that efficient switching requires detuning from the low-power wave vector matching condition. The switching behavior is very sensitive to wavelength detuning, both from the Bragg condition and from the higher-order mode cutoff condition. Furthermore, operation of the device is strongly nonreciprocal with respect to interchanging the mode launching condition
Keywords :
diffraction gratings; optical frequency conversion; optical waveguides; switching; Bragg condition; all-optical device; all-optical switching; detuning; dissimilar waveguide modes; grating structures; mode launching condition; power-dependent mode-conversion; switching-power; Fiber nonlinear optics; Gratings; Nonlinear optics; Optical bistability; Optical feedback; Optical mixing; Optical sensors; Optical solitons; Optical waveguides; Ultrafast optics;
Journal_Title :
Lightwave Technology, Journal of
