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

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6 Author(s)
Studenkov, P.V. ; Dept. of Electr. Eng., Princeton Univ., NJ, USA ; Gokhale, M.R. ; Lin, W. ; Glesk, I.
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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.

Published in:

Photonics Technology Letters, IEEE  (Volume:13 ,  Issue: 6 )