Optical add/drop multiplexer
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United States of America Patent
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Dec 9, 2003
Grant Date -
N/A
app pub date -
Jan 13, 2000
filing date -
Sep 22, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical add/drop multiplexer capable of extracting signals from within a specified waveband in a group of signals containing various wavelengths, and then adding back a new set of signals also within the specified waveband. The multiplexer includes an optical filter plate, a plane reflector and three graded-index lenses. Using a single optical filtering plate and a plane reflector to carry out multiple reflections, intra-band isolation of light signals is improved and cost of production is reduced.
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