Optical communications – Optical repeater system – Specific optical waveguide
Reexamination Certificate
2003-06-11
2011-11-15
Tran, Dzung (Department: 2613)
Optical communications
Optical repeater system
Specific optical waveguide
C398S176000, C398S180000
Reexamination Certificate
active
08059966
ABSTRACT:
An optical regeneration system for regenerating a degenerated signal light, comprising a regeneration device having at least one of a soliton converter, a pulse roller, a Kerr-shutter and a soliton purifier. The solilton converter uses an anomalous-dispersion fiber (ADF) having a fiber length up to three times the soliton frequency, and the pulse roller is provided with a pulse roller fiber having high non-linear characteristics. The Kerr-shutter comprises an optical LO (local oscillation) generator for generating an optical LO on an OPLL (optical phase locked loop), a phase comparator for detecting the phase difference between an externally-input signal light and an optical LO, and a control unit for regulating the repeated frequency of an optical LO based on the phase difference. The soliton purifier has a soliton fiber disposed between two optical fibers.
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Hiroishi Jiro
Igarashi Koji
Inoue Takashi
Matsushita Shunichi
Namiki Shu
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
The Furukawa Electric Co. Ltd.
Tran Dzung
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