Opto-VLSI-based correlator architecture for multiwavelength optical header recognition

• Published in: Journal of lightwave technology Vol. 24; no. 7; pp. 2779 - 2785
• Main Authors: Aljada, M., Alameh, K.E., Al-Begain, K.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.07.2006; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Arrays; Bragg gratings; Circuit properties; Correlation; Correlators; Delay effects; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Fiber gratings; Headers; Integrated optics. Optical fibers and wave guides; Lookup tables; Microprocessors; Optical and optoelectronic circuits; Optical arrays; Optical communication; Optical correlators; Optical fiber communications; Optical telecommunications; packet switching; Pattern matching; Pattern recognition; Recognition; Routing; Switching and signalling; Systems, networks and services of telecommunications; Table lookup; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Very large scale integration; wavelength-division multiplexing (WDM); Wavelengths; Integrated optics; Optical telecommunication; Bragg grating; Optical correlator; Table lookup; Optical processor; Time dependence; optical correlators; Optical communication; Optical fiber communication; Delay time; Delayed time; Optical fiber; High rate transmission; Packet switching; VLSI circuit; Wavelength division multiplexing; Routing; Pattern recognition; Grating in fiber; Look up table; Circuit architecture; wavelength-division multiplexing (WDM); Integrated circuit; Signal processing; Feature extraction; Autocorrelation
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/JLT.2006.875949

A novel optical correlator employing an opto-very-large-scale-integration (VLSI) processor to construct the routing lookup table, in conjunction with an array of fiber Bragg gratings (FBGs) for multiwavelength optical header recognition is demonstrated. The FBG array provides wavelength-dependent time delays, whereas the opto-VLSI processor generates wavelength intensity profiles that match arbitrary bit patterns. The recognition of 4-b optical patterns is experimentally demonstrated at 2.2 Gb/s by showing that the correlator produces an autocorrelation waveform of high peak whenever the input bit pattern matches the wavelength intensity profile.