System for optically demultiplexing wavelength bands

Details System for optically demultiplexing wavelength bands System for optically demultiplexing wavelength bands

2006-08-01

2006-08-01

Pak, Sung (Department: 2874)

Optical waveguides

With optical coupler

Plural

C398S079000

Reexamination Certificate

active

07085447

ABSTRACT:
An optical demultiplexer system for separating adjacent wavelength bands without losing inter-band channels and comprising a first filter stage (210) of relatively narrow passband and relatively high selectivity in order to extract all of the inter-band channels. The first stage is followed by a second filter stage (240) of relatively broad passband and relatively low selectivity to extract the wavelength bands delivered by the first filter stage. Such a system makes it possible to use the inter-band channels, in particular for managing the network and the wavelength bands.

REFERENCES:
patent: 6067178 (2000-05-01), Zheng
patent: 6208444 (2001-03-01), Wong et al.
patent: 0 874 489 (1998-10-01), None
patent: 1 043 859 (2000-10-01), None
patent: 1 213 866 (2002-06-01), None
patent: WO 01/05082 (2001-01-01), None
patent: WO 01/16558 (2001-03-01), None
patent: WO 01/41347 (2001-06-01), None

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