Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2006-06-13
2006-06-13
Leung, Christina Y (Department: 2633)
Optical communications
Multiplex
Wavelength division or frequency division
C398S088000
Reexamination Certificate
active
07062174
ABSTRACT:
An Optical Tapped Delay Line (OTDL) is combined with other known optical apparatuses to provide an add-drop multiplexer for a wavelength division multiplexing fiber optic network. Each output beam of the OTDL is spatially distinguishable in free space. This wavelength accessibility enables selection of one or more of the optical beams for adding or dropping. The system can be a fixed or tunable single channel add/drop system, a fixed or tunable multi-channel add/drop system, or a fully programmable add/drop system.
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Frampton Keith R.
Turpin Terry M.
Essex Corporation
Leung Christina Y
Morrison & Foerster / LLP
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