Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1997-03-10
1999-08-17
Moskowitz, Nelson
Optical: systems and elements
Optical amplifier
Optical fiber
359117, 359128, 385 17, 385 20, 385 32, G02B 600, H04B 1000, G02G 626
Patent
active
059402083
ABSTRACT:
A fiber optic device for use in fiber optic transmission systems and components thereof includes a pass-through fiber and one or more lengths of circulating fiber connected to the pass-through fiber by respective optical switches for selectively routing an optical signal through the circulating fiber lengths as it propagates along the pass-through fiber. The circulating fiber lengths are either dispersion compensating fibers or fibers doped with a substance that will amplify or absorb the optical signal in the respective presence or absence of a pump signal. The invention thus allows various amounts of dispersion or gain (absorption) to be selectively switched into or out of use depending upon requirements at the time. For example, an amplifying component could serve as a pre- or power- or in-line amplifier device depending on the lesser or greater amount of gain fiber elected by switching. The device can be interconnected with the transmission system or components thereof via splicing to of the ends of the pass-through fiber or via optical switches connected to the ends of the pass through fiber.
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Blaszyk Robert P.
Hall Douglas W.
Yadlowsky Michael
Corning Incorporated
Greener William
Moskowitz Nelson
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