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

Glesk, I. (2001) Monolithic, 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.