Monolithic integration of an all-optical Mach-Zehnder demultiplexer using an asymmetric twin-waveguide structure

Studenkov, P. V. and Gokhale, M. R. and Wei, J. and Lin, W. and Glesk, I. and Prucnal, Paul R. and Forrest, S.R. (2001) Monolithic integration of an all-optical Mach-Zehnder demultiplexer using an asymmetric twin-waveguide structure. IEEE Photonics Technology Letters, 13 (6). pp. 600-602. ISSN 1041-1135

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Abstract

We demonstrate monolithic integration of a twin-waveguide Mach-Zehnder terahertz optical asymmetric demultiplexer (MZ-TOAD). The InGaAsP-InP device operates at 1.55 μm wavelength and has two semiconductor optical amplifiers in the asymmetric MZ interferometer configuration with a single control input and a built-in switching delay. A 28-ps full-width at half-maximum (FWHM) switching window with high contrast ratio for a range of control powers is obtained using a counter-propagating optical signal and control pulses.