Modulator control system and method in an optical network
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United States of America Patent
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Mar 11, 2014
Grant Date -
Oct 4, 2012
app pub date -
Nov 12, 2010
filing date -
Nov 12, 2009
priority date (Note) -
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Abstract
The invention relates to an optical modulator control system implemented in an optical burst mode transmitter, said control system comprising means for measuring a plurality of optical power sample values and associated optical wavelength data values from a modulator at a first sampling rate, wherein an average power table is generated from said values for each sample period and stored in a memory. The control system also comprises means for performing a control error calculation from two or more stored average power tables at a second sampling rate to calculate a single error value to provide gain and/or bias control signals, wherein the second sample rate is sampled at a slower rate than the first sample rate. The control system described optimises the modulator performance over temperature and lifetime in an optical network.
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