Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2007-05-15
2007-05-15
Font, Frank G. (Department: 2883)
Optical waveguides
With optical coupler
Input/output coupler
C385S027000, C398S147000
Reexamination Certificate
active
11190889
ABSTRACT:
A dispersion compensating fiber whose chromatic dispersion is positive and a negative dispersion compensating fiber whose chromatic dispersion is negative are prepared, and division-multiplexed optical signals, after being guided to either dispersion compensating fiber to once shift the whole wavelength band to positivity or negativity, are subjected to fine adjustment with a dispersion compensating fiber of a reverse sign.
REFERENCES:
patent: 5608562 (1997-03-01), Delavaux et al.
patent: 5930045 (1999-07-01), Shirasaki
patent: 5943151 (1999-08-01), Grasso et al.
patent: 6647180 (2003-11-01), Rothenberg
Fukashiro Yasuyuki
Hirai Tooru
Nakano Hiroyuki
Uda Tetsuya
Antonelli, Terry Stout & Kraus, LLP.
Font Frank G.
Hitachi Communication Technologies Ltd.
Wong Eric
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