Single-mode-transmission optical fiber and a method of manufacturing the same

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United States of America Patent

PATENT NO 4406518
SERIAL NO

06236509

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Abstract

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A single-mode-transmission optical fiber comprises a core of a radius a having an arbitrary (non constant) refractive index distribution n(r) in the radial direction r, the index distribution being expressed by n.sup.2 (r)=n.sub.1.sup.2 {1-2.DELTA..sub.o f(r)}, and a cladding having a constant refractive index n.sub.2, the radius a of the core being: ##EQU1## In these expressions, n.sub.1 denotes a maximum refractive index of the core, .lambda. denotes a transmission light wavelength, ##EQU2## and a normalized frequency V is expressed by ##EQU3## Y is a solution Y in the case where X and Y are solutions of simultaneous equations: ##EQU4## of a function which is expressed by: ##EQU5##

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Patent Owner(s)

  • HITACHI, LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Katsuyama, Toshio Hachiouji, JP 48 758
Matsumura, Hiroyoshi Saitama, JP 45 750
Suganuma, Tsuneo Tokorozawa, JP 22 366

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