Title :
Neural-processing-type optical WDM demultiplexer
Author :
Aisawa, Shigeki ; Noguchi, Kazuhiro ; Koga, Masafumi ; Matsumoto, Takao ; Amemiya, Yoshihito ; Sugita, Akio
Author_Institution :
NTT Transmission Syst. Labs., Kanagawa, Japan
fDate :
12/1/1993 12:00:00 AM
Abstract :
A neural-processing-type optical WDM demultiplexer consisting of a multimode waveguide, a detector array, and an electrical neural network (NN) is described. This demultiplexer regenerates the original signals by recognizing the different speckle patterns of each channel with the pattern-recognition function of an NN. The demultiplexing properties can be flexibly changed, in the electrical domain, by modifying the parameters of the NN, and only simple optical components are required for implementation. Three 150-Mb/s WDM signals are successfully demultiplexed with a silica-based multimode planar waveguide, a four-channel detector array, and two high-speed analog neural network integrated circuits (ANNIC´s), each of which has sixteen modifiable weights and four sigmoidal transfer functions
Keywords :
demultiplexing equipment; linear integrated circuits; neural chips; optical communication equipment; optical waveguides; wavelength division multiplexing; 150 Mbit/s; WDM signals; analog neural network integrated circuits; detector array; electrical neural network; modifiable weights; multimode waveguide; neural processing demultiplexer; optical WDM demultiplexer; optical components; pattern recognition; sigmoidal transfer functions; signal regeneration; silica; speckle patterns; Adaptive optics; High speed optical techniques; Neural networks; Optical arrays; Optical computing; Optical fiber networks; Optical waveguides; Repeaters; Sensor arrays; Wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
