Analysis of Optical Processing for Recognition of BPSK Optical Codes Using Collinear Acoustooptic Switches for Photonic Routing Network

Nobuo GOTO  Yasumitsu MIYAZAKI  

IEICE TRANSACTIONS on Electronics   Vol.E90-C   No.2   pp.334-342
Publication Date: 2007/02/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e90-c.2.334
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Electromagnetic Theory and Its Application)
Category: Electromagnetics in Information Processing
photonic router,  optical label,  acoustooptic effect,  code matching,  binary phase shift keying,  

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Optical processing with efficient coding is expected in photonic label routing network. We consider optical codes encoded in the time and spectral domains. Wavelength-selective devices are useful for effective processing of such optical codes. In this study, collinear acoustooptic (AO) switches are investigated as a constituent elements of a wavelength selective correlator for optical BPSK codes. It is theoretically shown that the number of optical codes that can be distinguished is 2Nt-1, where Nt is the bit number of optical pulses. The device can also be used for recognition of codes encoded in time and spectral domains. Crosstalk in code recognition is discussed with numerical analysis considering AO filtering characteristics for optical processing with collinear AO devices.