Nonlinearity-induced broadening of resonances in dynamically modulated couplers

Abstract

We report the observation of nonlinearity-induced broadening of resonances in dynamically modulated directional couplers. When the refractive index of the guiding channels in the coupler is harmonically modulated along the propagation direction and out-of-phase in two channels, coupling can be completely inhibited at resonant modulation frequencies. We observe that nonlinearity broadens such resonances and that localization can be achieved even in detuned systems at power levels well below those required in unmodulated couplers.

14 pages, 4 figures, to appear in Optics Letters

References in corpus (3)

• Visualization of Coherent Destruction of Tunneling in an Optical Double Well System
• Resonant mode flopping in modulated waveguiding structures
• Diffraction-managed solitons and nonlinear beam diffusion in modulated arrays of optical waveguides

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