Title :
Low-crosstalk 4-channel coarse WDM filter using silica-based planar-lightwave-circuit
Author :
Inoue, Yasuyuki ; Oguma, Manabu ; Kitoh, Tsutomu ; Ishii, M. ; Shibata, Takuma ; Hibino, Y.
Author_Institution :
NTT Photonics Labs., NTT Corp., Ibaraki, Japan
Abstract :
We have demonstrated a 20 nm-spacing 4-channel CWDM waveguide filter, which we fabricated by employing the half-band filter design theory and silica-based PLC fabrication technology. The filter has advantages of compactness, low-loss, low-crosstalk, and a wide passband. This filter comprises a total of 16 MZI stages, which is the largest-scale lattice-form filter yet reported. This filter can be redesigned for 8-channel use or for different wavelength channels. This means that our filter can be employed as a group wavelength channel multi/demultiplexing filter for the DWDM systems. We believe that this wide passband filter will be a key device in optical metro/access networks.
Keywords :
Mach-Zehnder interferometers; demultiplexing equipment; integrated optoelectronics; lattice filters; metropolitan area networks; optical communication equipment; optical crosstalk; optical fibre subscriber loops; optical losses; optical waveguide filters; wavelength division multiplexing; CWDM waveguide filter; DWDM systems; MZI stages; group wavelength channel multi/demultiplexing filter; half-band filter design theory; lattice-form filter; low-crosstalk; low-loss; optical metro/access networks; silica-based PLC fabrication technology; wavelength channels; wide passband; Demultiplexing; Filtering theory; Optical device fabrication; Optical devices; Optical filters; Optical waveguides; Passband; Programmable control; Waveguide theory; Wavelength division multiplexing;
Conference_Titel :
Optical Fiber Communication Conference and Exhibit, 2002. OFC 2002
Print_ISBN :
1-55752-701-6
DOI :
10.1109/OFC.2002.1036213
