Optical element power control
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United States of America Patent
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Oct 19, 1999
Grant Date -
N/A
app pub date -
Sep 18, 1996
filing date -
Sep 6, 1996
priority date (Note) -
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Abstract
A control system for an optical element such as an optical amplifier in an optical transmission system determines the transmitted optical signal power in each of a plurality of different optical wavelength bands, determines which of the powers is closest to a threshold, and controls an output power of the element, or controls a parameter which affects the threshold, on the basis of the power closest to the threshold. Since there is no longer any need to allow a margin for possible gain variations between different wavelengths, power output can be controlled with reduced upper or lower margins, and thus error rates reduced, or transmission distances increased.
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