Control signal superimposer
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United States of America Patent
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Feb 13, 2001
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N/A
app pub date -
Jun 3, 1999
filing date -
Jun 3, 1998
priority date (Note) -
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Abstract
A control signal superimposer for superimposing a control signal on a signal light, comprising a pumping light source for generating a pumping light with intensity fluctuation in accordance with the control signal; a Raman amplification medium pumped by the pumping light from the pumping light source for Raman-amplifying the signal light; a combiner for combining the pumping light output from the pumping light source and the signal light to be Raman-amplified and then supplying them to the Raman amplification medium; and an optical filter for extracting the signal light component from the output light of the Raman amplification medium and terminating the pumping light component.
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