Method and apparatus to compensate for differential attenuation in an optical time slot interchanger
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United States of America Patent
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Nov 5, 1996
Grant Date -
N/A
app pub date -
Mar 31, 1994
filing date -
Mar 31, 1994
priority date (Note) -
Expired
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Abstract
Look-ahead control techniques and a variable attenuator are used to solve the known problem of differential attenuation of photonic intensities between time slots are delayed differently in delay paths that have different losses which optical time slot interchangers have. The result of the look-ahead control techniques and variable attenuator is a data frame in which the widely varying photonic intensities are equalized to a substantially similar level, thereby greatly reducing the bit error rate of the downstream receiver/demodulator.
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