Optical receiver and optical transmission apparatus

Details Optical receiver and optical transmission apparatus Optical receiver and optical transmission apparatus

2005-11-29

2005-11-29

Healy, Brian M. (Department: 2883)

Optical waveguides

With optical coupler

C385S014000, C385S024000, C385S034000, C385S088000, C385S092000, C398S079000, C398S082000, C398S085000

Reexamination Certificate

active

06970613

ABSTRACT:
The optical receiver includes: an optical input port for receiving WDM signals; a transmittable-wavelength-variable filtering unit which transmits, of the received WDM signals, a light signal in a predetermined transmittable wavelength bandwidth with a desired central wavelength of λi (i=1 to n: n is an integer number greater than 2); an optical output port which outputs the remaining light signals at wavelengths (λi) (k=1 to n; k≠i) untransmittable through the transmittable-wavelength-variable filtering unit; and a control unit which controls the central wavelength so that the level of the light signal passing through the transmittable-wavelength-variable filtering unit is the maximum. It is whereby possible to flexibly accommodate changes in number of channels combined in a WDM system, and to adaptively minimize ASE light leaking into the photoreceptor of the optical receiver even in a CWDM system with wide channel spacing.

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patent: 8-237203 (1996-09-01), None
patent: 11-122221 (1999-04-01), None

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