Wavelength dispersion compensating apparatus

Details Wavelength dispersion compensating apparatus Wavelength dispersion compensating apparatus

2005-10-18

2005-10-18

Assaf, Fayez G. (Department: 2872)

Optical: systems and elements

Light interference

Electrically or mechanically variable

C359S577000, C359S615000, C398S147000

Reexamination Certificate

active

06956700

ABSTRACT:
A wavelength dispersion compensating apparatus of the invention comprises: a VIPA plate capable to output incident lights at different angles according to wavelengths; a variable dispersion diffraction grating which can angularly disperse the lights of respective wavelengths output from the VIPA plate, in a direction substantially perpendicular to a direction of angular dispersion in the VIPA plate and also capable to change an amount of the angular dispersion; a light return apparatus which condenses the output lights from the variable dispersion diffraction grating and reflects them by a mirror, to return them to the VIPA plate side; and a stage rotation mechanism which rotates a movable stage on which the lens and the mirror are mounted, according to a diffraction angle in the variable dispersion diffraction grating, so as to enable wavelength dispersion and wavelength dispersion slope to be given to a WDM light, to be changed independently. As a result, it becomes possible to compensate for, over a wide wavelength band, the wavelength dispersion and wavelength dispersion slope of the WDM light, which are propagated through an optical fiber to be accumulated.

REFERENCES:
patent: 6607278 (2003-08-01), Shirasaki et al.
patent: 6646805 (2003-11-01), Mitamura et al.
patent: 6714705 (2004-03-01), Lin et al.
patent: 6744991 (2004-06-01), Cao
patent: 2002/0122256 (2002-09-01), Mitamura et al.
patent: 2002-258207 (2002-09-01), None

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