Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1996-09-13
1999-05-25
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359124, 359161, H04B 1017, H04B 1018, H04J 1402
Patent
active
059074205
ABSTRACT:
A system and method of protecting all the amplifiers in a link between wavelength routing network elements of an optical network. According to the invention, an optical control channel is added before a plurality of optical amplifier, preferably the first amplifier, in a link. To prevent improper loading of downstream links, the control channel is stripped off at the next wavelength routing network element. The power of the control channel is automatically adjusted using a fast feedback circuit to hold substantially constant the total power of the signal channels and the control channel at the input of the first amplifier following the feedback loop. In this manner, channel loading of all optical amplifiers in the link is maintained substantially constant, and the incidence of error bursts, as might otherwise result when one or more channels are added or dropped due to a network fault or reconfiguration, is substantially reduced.
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Chraplyvy Andrew R.
Ellson John C.
Newsome George W.
Tkach Robert William
Zyskind John Lehrer
Lucent Technologies - Inc.
Pascal Leslie
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