Optical waveguides – Optical fiber waveguide with cladding
Patent
1998-10-09
2000-07-18
Palmer, Phan T. H.
Optical waveguides
Optical fiber waveguide with cladding
385124, 385126, 385127, G02B 602
Patent
active
06091873&
ABSTRACT:
A dispersion-shifted optical fiber (DS-fiber) is structured so that it has nearly zero chromatic dispersion in the 1.55 .mu.m wavelength band and, at the same time, achieves both reduced non linear effects and low dispersion slope. In particular, dispersion slope is reduced to a level sufficient for the fiber to be used for wavelength division multiplexing (WDM) applications. The properties of the fiber are developed such that chromatic dispersion in the 1.55 .mu.m band is nearly zero but not zero, effective cross section area is 45.about.70 .mu.m.sup.2, bending loss is 0.1.about.100 dB/m, dispersion slope is 0.05.about.0.08 ps/km
m.sup.2, and the cutoff wavelength is such that transmission is always single-mode transmission within the 1.55 .mu.m band. Such a DS-fiber has sufficiently large effective cross section area Aeff, low bending loss and small dispersion slope to make the fiber suitable for use in WDM transmission systems.
REFERENCES:
patent: 5963700 (1999-10-01), Kato et al.
patent: 5995695 (1999-11-01), Aikawa et al.
WO 97/33188, International Publication Date: Sep. 12, 1997.
XP 000646740, Single-Mode Dispersion-Shifted Fibers With Effective Area Larger Than 80 um.sup.2 and Good Bending Performance.
XP-000749816, Dispersion Shifted Optical Fiber for Wavelength-Division-Multiplexing Transmission.
N. Yamada et al., "Dispersion Shifted Fibers With Low Nonlinear Sensitivity", Technical Digest CLEO/Pacific Rim '95, pp. 44, Jul. 10, 1995.
S. Matsuo, et al., "Dispersion Shifted Fibers for WDM Transmission", Technical Report of IEICE CS97-43, OCS97-23 (1997-06), pp. 37-42, Jun. 24, 1997.
S. Matsuo, et al., "Dispersion Shifted Fibers With Low Nonlinear Sensitivity", Technical Report of IEICE vol. 96, No. 217 EMD96-39-52, pp. 55-59, Aug. 1, 1996.
Horikoshi Masahiro
Matsuo Shoichiro
Fujikura Ltd.
Palmer Phan T. H.
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