Wavelength-division switching system for optical...

Details Wavelength-division switching system for optical... Wavelength-division switching system for optical...

H - Electricity

04

Q

344/28, 363/1.8

H04Q 11/02 (2006.01) H04J 14/02 (2006.01) H04Q 11/00 (2006.01)

Patent

CA 2008675

ABSTRACT An optical switching system has an input terminal for receiving an optical wavelength-division multiplexed (WDM) signal in which optical signals differing in center wavelength .lambda.i (i = 1 to N) are wavelength-division multiplexed, the optical signal being an optical frequency-shift keying (FSK) signal which is a first optical FSK signal Fi. A splitter splits the optical WDM signal correspondingly to the wave- lengths .lambda.i to generate optical wavelength-corresponding WDM signals Wi. Wavelength extracting circuits extract optical FSK signals Fj (j = 1 to N) pertaining to wavelengths .lambda.j, to which the wavelengths .lambda.i are to be switched, from the optical wavelength-corresponding WDM signals Wi to generate optical amplitude-shift keying (ASK) signals Aj pertaining to the wavelengths .lambda.j to be switched to. Wavelength switches switch the optical ASK signals Aj to second optical FSK sig- nals Fi corresponding to the wavelengths .lambda.i. A wavelength multiplexer wavelength-multiplexes the second optical FSK signals Fi into an optical switched WDM signal.

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