M. Horita et al., WAVELENGTH TUNABLE OPTICAL ADD AND DROP MULTIPLEXER UTILIZING COUPLEDSEMICONDUCTOR WAVE-GUIDES AND A STRIPED THIN-FILM HEATER, Electronics Letters, 34(23), 1998, pp. 2240-2241
A wavelength tunable semiconductor optical ADM is implemented which ut
ilises coupled semiconductor waveguides and a striped thin-film hearer
. Stable optical characteristics over an 11 nm tuning range, such as i
nsertion loss variation, crosstalk and 3dB optical bandwidth are demon
strated. Through 5 Gbit/s demultiplexing experiments it was confirmed
that there were no inherent transmission problems due to the device ev
en when the centre wavelength was tuned. Also the possibility of penal
ty-free tunable demultiplexing was demonstrated for the first time.