Optical network and optical add/drop apparatus

Details Optical network and optical add/drop apparatus Optical network and optical add/drop apparatus

2005-01-21

2008-10-07

Chan, Jason (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C398S069000, C398S073000

Reexamination Certificate

active

07433601

ABSTRACT:
Provided are a plurality of fixed wavelength drop filters35demultiplexing optical signals having a plurality of different fixed wavelengths, a plurality of fixed wavelength add filters36provided corresponding respectively to the fixed wavelength drop filters35and adding the optical signals having the fixed wavelengths wavelength division multiplexed light flowing along a transmission path1, a first optical branching unit31branching part of the wavelength division multiplexed light flowing along the transmission path1, and a variable wavelength drop filter32demultiplexing the optical signal having the wavelength corresponding to a specified value from the wavelength division multiplexed light branched by the first optical branching unit31.

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