Optical wavelength division multiplexing access system

Details Optical wavelength division multiplexing access system Optical wavelength division multiplexing access system

2004-05-28

2009-06-30

Vanderpuye, Ken N (Department: 2613)

Optical communications

Multiplex

Broadcast and distribution system

C398S067000, C398S068000, C398S070000, C398S071000, C398S005000, C398S007000, C398S020000, C398S021000, C398S030000, C398S031000, C398S035000, C398S092000

Reexamination Certificate

active

07555215

ABSTRACT:
A dual structure for a multiplexing section extended to an OSU is obtained without adding a dynamic function, such as an optical switch, to a W-MULDEM. The W-MULDEM of an optical wavelength division multiplexing access system divides, among ports corresponding to the individual ONUs, downstream optical signals having wavelengths λd1to λdn, which are received along a current-use optical fiber, or downstream optical signals having wavelengths λd1+Δλ to λdn+Δλ, which are received along a redundant optical fiber. The W-MULDEM also multiplexes, for the port that corresponds to the current-use optical fiber or the redundant optical fiber, upstream optical signals having wavelengths λu1to λun or wavelengths λu1+Δλ to λun+Δλ, which are received along optical fibers corresponding to the ONUs. A wavelength difference between the downstream optical signal and the upstream optical signal that are consonant with each ONU is defined as an integer times the FSR of an AWG.

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