Optical: systems and elements – Diffraction – From grating
Reexamination Certificate
2007-08-28
2007-08-28
Assaf, Fayez G. (Department: 2872)
Optical: systems and elements
Diffraction
From grating
C359S589000, C398S081000, C398S147000
Reexamination Certificate
active
11168433
ABSTRACT:
In a chromatic dispersion and dispersion slope compensating apparatus according to the present invention, a WDM light which has been angularly dispersed to a first direction by a VIPA plate, is angularly dispersed to a second direction vertical to the first direction by a diffraction grating, and optical signals of respective wavelengths output from the diffraction grating are reflected by any one of a plurality of three-dimensional mirrors having reflective surfaces of curved shapes different from each other, to be returned to the VIPA plate. Thus, with a simple control mechanism in which the plurality of three-dimensional mirrors are moved to only the second direction, an apparatus capable of variably compensating for the chromatic dispersion and the dispersion slope independent of each other can be provided.
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U.S. Appl. No. 10/901,219, filed Jul. 29, 2004, Nobuaki Mitamura et al., Fujitsu Limited of Kawasaki, Japan.
Kubota Yoshinobu
Miura Akira
Ooi Hiroki
Yamauchi Yasuhiro
Assaf Fayez G.
Fujitsu Limited
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