Optical demultiplexer and optical transmission system

Details Optical demultiplexer and optical transmission system Optical demultiplexer and optical transmission system

2008-01-29

2008-01-29

Singh, Dalzid (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C398S082000

Reexamination Certificate

active

10407935

ABSTRACT:
It is an object of the present invention to provide an optical transmission system in which multiple optical frequencies can be efficiently used and the change of the system can be easily made, and to provide an optical demultiplexer suitable for such optical transmission system. In an optical demultiplexer according to the present invention, signal light having a plurality of wavelength components arranged on a grid having predetermined frequency intervals is input from an input port thereof to be demultiplexed. The demultiplexed signal lights output from the output ports thereof have a plurality of wavelength components, respectively, and any three wavelength components, fa, fb, and fd, that satisfy the following conditions: fa<fb<fd; and fd−fa≦NΔf have the following relationship: 2fb≠fa+fdwhere N represents an integer, and Δf represents each of the predetermined frequency intervals.

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