Survival dwdm system
OwnerGiovanni Caprino, Roberto Magri +1inventors
InventorsGiovanni Caprino, Roberto Magri, Andrea Rivolta
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Abstract
A traffic survival method in optical fiber telecommunication systems and in particular DWDM and having amplification sites (10) with ADD/DROP of channels and arranged between fiber spans is described and claimed. In accordance with the method the ASE noise produced in amplifiers (13) in the site is amplified in power to compensate at output the power of channels (n) lost by breakage of the site inpul span. An amplification device with ADD/DROP and a telecommunication system with it is also described and claimed.
Claims5
Traffic survival method in optical fiber telecommunication systems and in particular DWDM and having amplification sites with ADD/DROP of channels and arranged between fiber spans and in which the ASE noise produced in amplifiers in the site is amplified in power to compensate at output the power of channels lost by breakage of the site input span.
Optical ADD/DROP amplification device designed to be arranged in an amplification site between optical fiber spans in an optical fiber telecommunication system and comprising along the signal path between the input and the output an input amplifier a channel ADD/DROP device and an output amplifier characterized in that the input amplifier has feedback which keeps the amplifier output power virtually constant at PoutPA independently of the input signal to amplify the power of the channels input to the site up to the power PoutPA and to amplify the power of the ASE noise in the amplifier up to a power Pase virtually equal to the power Pout in case of lack of input signal in such a manner as to compensate with the output ASE noise the power of the channels lost due to breakage of the site input span.
Optical fiber telecommunication system comprising a plurality of amplification sites with ADD/DROP of channels and connected together by optical fiber spans and in which at least one site comprises a device and/or applies the method in accordance with any of the above claims.
Dependencies are inferred from the claim text.