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All-optical Wavelength Conversion of 21.4-Gb/s QPSK Signals using Intersubband Transition in InGaAs/AlAsSb Coupled Double Quantum Wells

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Abstract

We have demonstrated format-free wavelength conversion using cross-phase modulation associated with intersubband transition (ISBT) in a quantum wells waveguide. The waveguide functions as an all-optical phase modulator and a TM-polarized-QPSK launched signal that excites ISBT is converted to a cross-polarized TE-signal immune to ISBT absorption.

© 2012 Optical Society of America

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