1976-10-20
1980-01-29
Hille, Rolf G.
350 9631, G02B 514
Patent
active
041858905
ABSTRACT:
In order to expand the product between the transmission length and the transmission bandwidth of an optical fiber for use in the optical communication and to facilitate the connection between the optical fibers, the optical fiber is made of transparent materials of three concentric layers of a core whose refractive index gradually decreases in the radial direction from the center, an intermediate layer which has a uniform refractive index lower than the varying refractive index of the core, and a cladding which has a uniform refractive index substantially equal to the lowest refractive index of the core.
REFERENCES:
patent: 3785718 (1974-01-01), Gloge
Ishida Koji
Onoda Seiichi
Suganuma Tsuneo
Sumi Masao
Tanaka Toshiki P.
Hille Rolf G.
Hitachi , Ltd.
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