Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Reexamination Certificate
2005-10-04
2005-10-04
Font, Frank G. (Department: 2883)
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
C385S127000, C385S123000, C385S124000, C385S125000
Reexamination Certificate
active
06952518
ABSTRACT:
The invention relates to a low dispersion slope dispersion-shifted single-mode fiber for large capacity transmission comprising a core and a cladding. Said fiber is characterized in that said core has three to five core segments having different refractive index profiles, and said cladding has four to six cladding segments. The total dispersion slope of said fiber at 1550 nm is less than 0.060 ps
m2·km, the zero dispersion wavelength is less than 1420 nm, the effective area ranges from 55 μm2to 65 μm2, and the dispersion in the region of 1530 nm˜1565 nm ranges from 5.0 ps
m2·km to 12.0 ps
m2·km. The fiber has low dispersion slope, moderate dispersion, low attenuation, and excellent bend resistance performance. It is suitable for a high-speed (10 Gbits/s and 40 Gbits/s), large capacity, and long distance DWDM system. Therefore, not only the non-linear problem that fazes high-speed communication is solved effectively, but also the DWDM transmission at 10 Gbits/s can be realized within a wider wavelength range. In addition, low dispersion slope is advantageous for comprehensive management of dispersion, so that the requirement for long distance non-electric relay can be fulfilled.
REFERENCES:
patent: 6396987 (2002-05-01), de Montmorillon et al.
patent: 6684016 (2004-01-01), Jung et al.
patent: 2003/0077057 (2003-04-01), Kato et al.
patent: 1068434 (2001-07-01), None
patent: 1337010 (2002-02-01), None
patent: 1348548 (2002-05-01), None
Cao Yuqing
Han Qingrong
Luo Jie
Matai Raadj
Wang TieJun
Dorsey & Whitney LLP
Font Frank G.
Kim Joanne H.
Yangtze Optical Fibre and Cable Co. Ltd.
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