Dynamic channel power equalizer based on VPG elements
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United States of America Patent
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Issued Date -
Mar 20, 2003
app pub date -
Sep 12, 2002
filing date -
Sep 20, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A channel power equalizer for adjusting the power levels of multiple channels in an optical beam is disclosed. The equalizer has a demultiplexer with a volume phase grating for isolating each of the channels of the optical beam. A photo-detector determines a power level of each of the channels and a variable optical attenuator adjusts the power level to a threshold value. After adjusting the power level of each channel, a multiplexer having a volume phase grating combines each of the channels together into a single power adjusted optical beam.
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