Title :
Arrayed-waveguide grating multiplexer with loop-back optical paths and its applications
Author :
Tachikawa, Yoshiaki ; Inoue, Yasuyuki ; Ishii, Motohaya ; Nozawa, Toshinori
Author_Institution :
NTT Opto-Electron. Labs., Ibaraki, Japan
fDate :
6/1/1996 12:00:00 AM
Abstract :
We present a basic configuration of an unique integrated-optic arrayed-waveguide grating (AWG) multiplexer with loop-back optical paths and demonstrate an add-drop multiplexer (ADM), a network access terminal, and a wavelength channel selector for dense-WDM ring or bus networks, as three useful examples of its attractive applications. A key device in these components is a silica-glass based 1.55 μm polarization-insensitive 32×32 AWG multiplexer chip with 0.8 nm channel spacing which is fabricated using planar lightwave circuit (PLC) technologies. Fine operation in their new functional components is achieved by using the AWG multiplexer module having low insertion loss of 3.9 dB and low interchannel crosstalk of less than -28 dB
Keywords :
diffraction gratings; integrated optics; multiplexing equipment; optical crosstalk; optical losses; optical planar waveguides; optical waveguide components; optical waveguides; wavelength division multiplexing; 1.55 mum; 3.9 dB; WDM bus networks; add-drop multiplexer; arrayed-waveguide grating multiplexer; channel spacing; dense-WDM ring networks; integrated-optic arrayed-waveguide grating multiplexer; loop-back optical paths; low insertion loss; low interchannel crosstalk; network access terminal; planar lightwave circuit; silica-glass based μm polarization-insensitive multiplexer chip; wavelength channel selector; Add-drop multiplexers; Arrayed waveguide gratings; Channel spacing; Integrated optics; Multiplexing; Optical add-drop multiplexers; Optical arrays; Optical crosstalk; Optical fiber networks; Optical polarization;
Journal_Title :
Lightwave Technology, Journal of
