Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1994-11-03
1996-09-24
Williams, Hezron E.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359118, 359120, H04B 1020
Patent
active
055596240
ABSTRACT:
A passive optical network architecture is disclosed for application in a local loop telephone environment. A local digital switch transmits an optical signal bearing information downstream over an optical fiber to the terminal equipment of a group of subscribers. This transmitted optical signal comprises light at a number of different wavelengths, i.e., it is a wavelength-division multiplexed signal, where each subscriber is associated with a particular wavelength of light. Each subscriber's terminal equipment detects that portion of the transmitted optical signal that exists at its assigned wavelength and thereby recovers the information sent by the local digital switch for that subscriber. However, a fraction of this detected optical signal is then remodulated by the subscriber's equipment with the subscriber's upstream information and returned to the local digital switch. As a result, no optical sources exist in the subscriber equipment in this optical network architecture.
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Darcie Thomas E.
Frigo N. J.
Magill Peter D.
Brendzel Henry T.
Lucent Technologies - Inc.
Moller Richard A.
Opalach Joseph J.
Williams Hezron E.
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