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All-optical nonlinear switching in GaAs-AlGaAs microring resonators

IEEE Photonics Technology Letters · 2002 · Vol. 14(1) · pp. 74–76

Vien Van✉(University of Maryland, College Park)T.A. Ibrahim(University of Maryland, College Park)K. J. Ritter(University of Maryland, College Park)P. Absil(University of Maryland, College Park)F.G. Johnson(University of Maryland, College Park)R. Grover(University of Maryland, College Park)J. Goldhar(University of Maryland, College Park)Paul T. P. Ho(University of Maryland, College Park)

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Abstract

We demonstrate all-optical nonlinear switching in compact GaAs-AlGaAs microring resonators at the 1.55-μm wavelength. Switching is accomplished in the pump-and-probe configuration in which the pump-and-probe signals are tuned to different resonance wavelengths of the microring. Refractive index change in the microring due to free carriers generated by two photon absorption is used to switch the probe beam in and out of resonance. Measured transient responses of the pump and probe through the microring show good agreement with theoretical predictions based on nonlinear pump-probe interaction due to two photon absorption.

Photonic and Optical Devices Advanced Fiber Laser Technologies Mechanical and Optical ResonatorsResonatorOptoelectronicsResonance (particle physics)Optical switchMaterials scienceRefractive indexOpticsWavelengthAbsorption (acoustics)Nonlinear optics

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