Single mode optical fibers

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350 9634, G02B 514

Patent

active

043726470

ABSTRACT:
In a single mode optical fiber of the type comprising a core, a cladding surrounding the core and an intermediate layer, the refractive indices n1, n2 and n3 respectively of the core, the cladding and the intermediate layer are selected such that the following relations are satisfied

REFERENCES:
patent: 3997241 (1976-12-01), Nishida et al.
patent: 4185890 (1980-01-01), Onoda et al.
patent: 4206968 (1980-06-01), Suganuma et al.
Kawakimi et al., "Characteristics of a Doubly Clad Optical Fiber with a Low-Index Inner Cladding", IEEE Journal of Quantum Electronics, Dec. 1974; pp. 879-887.
Daikoku et al., "Direct Measurement of Wavelength Dispersion in Optical Fibres-Difference Method", Electronics Letters, Mar. 2, 1978, vol. 14, No. 5; pp. 149-151.
Miya et al., "Ultimate Low Loss Single-Mode Fibre at 1.55 .mu.m", Electronics Letters, Feb. 15, 1979; pp. 106-108.

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