Single-mode optical fiber

Details Single-mode optical fiber Single-mode optical fiber

1997-12-12

1999-08-31

Lee, John D.

Optical waveguides

Optical fiber waveguide with cladding

Utilizing multiple core or cladding

385123, 385127, G02B 622

Patent

active

059464399

ABSTRACT:
This invention relates to a single-mode optical fiber having a configuration for effectively reducing bending loss. In the single-mode optical fiber, while an optical core is constituted by inner and outer cores, an optical cladding is constituted by an inner cladding in which "tailing" occurs and an outer cladding. In particular, in a cross section of the optical fiber perpendicular to the signal light guiding direction, when the surface integral values of relative refractive index difference of the optical cladding and optical core with respect to the outer cladding having an average refractive index n.sub.0 are respectively S1 and S2, the optical fiber satisfies a relationship of S1/S2.gtoreq.0.8.

REFERENCES:
patent: 4755022 (1988-07-01), Ohashi et al.
patent: 5175785 (1992-12-01), Dabby
patent: 5559921 (1996-09-01), Terasawa et al.
"Relation between Macrobending Losses and Cutoff Wavelength in Dispersion-Shifted Segmented-Core Fibres", Electronic Letters, May 22, 1986, vol. 22, No. 11, pp. 574-575.

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