Optical differential group delay module with folded optical path
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United States of America Patent
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May 25, 2010
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N/A
app pub date -
Mar 26, 2008
filing date -
Mar 26, 2007
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Abstract
Differential group delay (DGD) devices and techniques based on folded optical paths. An in-line polarization monitor can be provided as a feedback for worst-case alignment without using an in-line polarizer. Polarization maintaining retro reflectors can minimize the introduced higher-order polarization effects caused by reflections between folding mirrors or prisms in conventional schemes.
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