Title :
Integrated-optic encoder/decoder for time-spreading/wavelength-hopping optical CDMA
Author :
Takiguchi, Koichi ; Itoh, Mikitaka
Author_Institution :
NTT Photonics Labs., NTT Corp., Kanagawa, Japan
Abstract :
We demonstrate an integrated-optic encoder/decoder for time-spreading/wavelength-hopping optical code division multiple access. It is composed of a wavelength multi/demultiplexer and variable delay lines fabricated by using silica-based planar lightwave circuit technology. We evaluated the device characteristics, including those of the key components and the encoding/decoding operation, and confirmed its flexible code assignment ability and good auto/cross correlations. We then tested the performance of the encoder/decoder by undertaking bit error rate measurements with 10-Gb/s pseudorandom binary sequence signals and confirmed its applicability to optical layer multicast routing and its ability to compensate for bit skew caused by fiber chromatic dispersion.
Keywords :
binary sequences; code division multiple access; code division multiplexing; decoding; encoding; error statistics; integrated optics; multicast communication; multiplexing equipment; optical correlation; optical delay lines; optical fibre communication; optical fibre dispersion; random sequences; telecommunication network routing; 10 Gbit/s; autocorrelation; bit error rate measurements; bit skew compensation; code assignment ability; code division multiplexing; cross correlation; decoder; decoding operation; encoder; encoding operation; fiber chromatic dispersion; integrated optics; multicast routing; optical CDMA; optical code division multiple access; optical layer; pseudorandom binary sequence; silica-based lightwave circuit technology; time-spreading; variable delay lines; wavelength demultiplexer; wavelength multiplexer; wavelength-hopping; Binary sequences; Bit error rate; Circuit testing; Decoding; Delay lines; Encoding; Integrated circuit technology; Integrated optics; Multiaccess communication; Optical fiber testing; Code division multiplexing; integrated optics; optical delay line; optical fiber communication; optical planar waveguide components; optical signal processing; optical waveguide filters;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2005.846535
