Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1989-03-02
1990-01-02
Sikes, William L.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
350 9616, 455610, G02B 628, H04B 900
Patent
active
048908932
ABSTRACT:
A device for affecting an individual bit rate limitation for each of a plurality of wavelength channels propagating in an optical fiber is disclosed. In a particular embodiment, the device comprises a directional coupler which is inserted into the optical fiber link. A recirculation path for a fraction of the power propagating in the fiber link extends between an output of the coupler and an input of the coupler. Illustratively, the recirculation path includes a wavelength division demultiplexer and an individual delay element for each wavelength channel. Optical switches may be utilized to block or permit passage of individual wavelength channels in the recirculation path.
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Bell Communications Research Inc.
Falk James W.
Sikes William L.
Ullah Akm E.
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