All-optical tunable filter in a nonlinear waveguide grating: analysis using coupled-mode theory

Ferideh Khaleghi; Eli S. Simova; Mohsen Kavehrad

doi:10.1117/12.205276

23 March 1995 All-optical tunable filter in a nonlinear waveguide grating: analysis using coupled-mode theory

Ferideh Khaleghi, Eli S. Simova, Mohsen Kavehrad

Proceedings Volume 2402, Components for Wavelength Division Multiplexing; (1995) https://doi.org/10.1117/12.205276
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

An optically tunable filter device is considered based on a Bragg reflection grating in a nonlinear waveguide. An external light beam of high intensity controls the refractive index via nondegenerate optical Kerr effect and tunes the grating to a selected wavelength. The signal wavelengths are different from the excitation, and typical values of the signal power do not affect the refractive index of the material. Assuming an instantaneous response of the Kerr material and neglecting absorption, we apply the general predictions of the local normal mode expansion theory (LNME) for an arbitrary angle of incidence. A design example is given in a waveguide based on InGaAs on a AlGaAs substrate. The spectral response and tuning range of the waveguide filter device is examined.

Citation Download Citation

Ferideh Khaleghi, Eli S. Simova, and Mohsen Kavehrad "All-optical tunable filter in a nonlinear waveguide grating: analysis using coupled-mode theory", Proc. SPIE 2402, Components for Wavelength Division Multiplexing, (23 March 1995); https://doi.org/10.1117/12.205276

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