Title :
Eight-channel flat spectral response arrayed-waveguide multiplexer with asymmetrical Mach-Zehnder filters
Author :
Okamoto, K. ; Takiguchi, K. ; Ohmori, Y.
Author_Institution :
NTT Opto-Electron. Labs., Ibaraki, Japan
fDate :
3/1/1996 12:00:00 AM
Abstract :
An eight-channel flat spectral response arrayed-waveguide grating (AWG) multiplexer with asymmetrical Mach-Zehnder filters has been fabricated on the planar lightwave circuit (PLC). The monotonic spectral loss characteristics of AWG have been canceled by the opposite spectral response in the asymmetric MZ filter. The 1.5 dB bandwidth of 141 GHz and 3 dB bandwidth of 159 GHz are obtained for the 200 GHz channel spacing. The 1.5 dB bandwidth becomes 1.8 times wider than that of the conventional AWG. Crosstalks to neighboring and all other channels are less than -24 dB and the on-chip insertion losses range from 7.0 to 7.4 dB, respectively.
Keywords :
Mach-Zehnder interferometers; diffraction gratings; interference filters; multiplexing equipment; optical communication equipment; optical crosstalk; optical losses; optical planar waveguides; optical waveguide components; wavelength division multiplexing; 141 GHz; 159 GHz; 7.0 to 7.4 dB; AWG multiplexer; arrayed-waveguide grating multiplexer; asymmetrical Mach-Zehnder filters; crosstalks; eight-channel flat spectral response arrayed-waveguide multiplexer; monotonic spectral loss characteristics; on-chip insertion losses; opposite spectral response; optical WDM networks; planar lightwave circuit; Arrayed waveguide gratings; Bandwidth; Channel spacing; Circuits; Crosstalk; Filters; Insertion loss; Multiplexing; Optical arrays; Programmable control;
Journal_Title :
Photonics Technology Letters, IEEE
