Twin coupler with mode scrambling for multimode pumping of optical amplifiers
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United States of America Patent
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Sep 25, 2001
Issued Date -
N/A
app pub date -
Feb 5, 1999
filing date -
Aug 23, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A twin coupler system couples a multimode pump power signal from a pump fiber to an optical information carrying double-clad signal fiber. The twin coupler system includes first and second optical couplers and a mode scrambler. The first optical coupler couples the pump fiber to the optical signal fiber to transfer outer modes of the pump power signal from the pump fiber into the optical signal fiber. The mode scrambler scrambles the modes of the pump power signal remaining in the pump fiber beyond the first optical coupler. The second optical coupler couples the pump fiber to the optical signal fiber to transfer outer modes of the scrambled pump power signal from the pump fiber into the optical signal fiber.
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