Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Reexamination Certificate
2007-10-23
2007-10-23
Font, Frank G. (Department: 2883)
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
C385S123000, C385S124000, C385S126000, C385S128000, C385S141000, C385S142000, C385S144000
Reexamination Certificate
active
11544007
ABSTRACT:
The present invention relates to an optical fiber which has a structure for further increasing an FOM (=|dispersion|/loss) and which can be applied to a dispersion compensation module. The optical fiber is mainly composed of silica glass and has a core region including a center of an optical axis, a depressed region surrounding the core region, a ring region surrounding the depressed region, and a cladding region surrounding the ring region and doped with F. As compared with the refractive index of pure silica glass, a relative refractive index difference of the core region is 3% or more but 4% or less, a relative refractive index difference of the depressed region is −1% or more but −0.5% or less, a relative refractive index difference of the ring region is 0.01% or more but 0.24% or less, and a relative refractive index difference of the cladding region is −0.3% or more but −0.1% or less. The FOM at the wavelength of 1550 nm is 250 ps
m/dB or more.
REFERENCES:
patent: 6498887 (2002-12-01), Gruner-Nielsen et al.
patent: 2003/0063878 (2003-04-01), Matsuo et al.
patent: 2004/0109656 (2004-06-01), Aikawa et al.
patent: 2004/0141701 (2004-07-01), Yagi et al.
patent: 2005/0089289 (2005-04-01), Hayami et al.
patent: 2005/0201703 (2005-09-01), Yamamoto
patent: 3247221 (2001-11-01), None
patent: 2002-169049 (2002-06-01), None
patent: 2003-84162 (2003-03-01), None
patent: 2003-104751 (2003-04-01), None
patent: 2004-38006 (2004-02-01), None
patent: 2004-126141 (2004-04-01), None
patent: 2004-157507 (2004-06-01), None
patent: 3602152 (2004-10-01), None
patent: 2005-257928 (2005-09-01), None
Kristensen, et al., “Dispersion and Slope Compensating Module for G.652 Fiber with x4 Reduced Physical Dimensions,” ECOC-IOOC 2003 Proceedings, 2003, pp. 586-587, vol. 3, Paper We4.P.14-15.
Grüner-Nielsen, et al., “Dispersion-Compensating Fibers,” Journal of Lightwave Technology, Nov. 2005, pp. 3566-3579, vol. 23, No. 11.
Haruna Tetsuya
Hirano Masaaki
Makihara Kazumasa
Onishi Masashi
Sasaki Takashi
Dupuis Derek L.
Font Frank G.
McDermott Will & Emery LLP
Sumitomo Electric Industries Ltd.
LandOfFree
Optical fiber, optical transmission line, optical module and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical fiber, optical transmission line, optical module and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical fiber, optical transmission line, optical module and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3858248