Control signal superimposer
AssigneesKDD Corporation, KDD Submarine Cable Systems Inc.
InventorsYukio Horiuchi, Masatoshi Suzuki, Shu Yamamoto, Shigeyuki Akiba
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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.
Claims13
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 fluctuations 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, said Raman amplification medium having output light comprising a light signal component and a pumping light component;
- a combiner for combining the pumping light from the pumping light source and the signal light to be Raman-amplified and supplying such combined light 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.
Dependencies are inferred from the claim text.