Pv. Studenkov et al., Monolithic integration of an all-optical Mach-Zehnder demultiplexer using an asymmetric twin-waveguide structure, IEEE PHOTON, 13(6), 2001, pp. 600-602
We demonstrate monolithic integration of a twin-waveguide Mach-Zehnder tera
hertz optical asymmetric demultiplexer (MZ-TOAD), The InGaAsP-InP device op
erates at 1.55 mum wavelength and has two semiconductor optical amplifiers
in the asymmetric MZ interferometer configuration with a single control inp
ut 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 i
s obtained using a counterpropagating optical signal and control pulses.