Optical demultiplexer and optical transmission system

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

H - Electricity

04

J

H04J 14/02 (2006.01) H04J 14/06 (2006.01)

Patent

CA 2424087

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, f a, f b, and f d, that satisfy the following conditions: f a < f b < f d; and f d - f a <= N.DELTA.f have the following relationship: 2f b ~ f a + f d where N represents an integer, and .DELTA.f represents each of the predetermined frequency intervals.

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