1982-06-17
1985-02-19
Sikes, William L.
350 9633, G02B 514
Patent
active
045001685
ABSTRACT:
In the single polarization optical fiber of the present invention, an elliptical jacket is composed of SiO.sub.2 +P.sub.2 O.sub.5 +B.sub.2 O.sub.3, whereby increase in transmission loss at long wavelength band is prevented. In the process for fabricating single polarization optical fibers of the invention, a starting silica tube is subjected to pressure reduction with an amount of pressure reduction in response to concentration of dopants P.sub.2 O.sub.5 +B.sub.2 O.sub.3, whereby an ellipticity of the resulting elliptical jacket is made to be a pertinent value.
REFERENCES:
patent: 4339173 (1982-07-01), Aggarwal et al.
patent: 4385802 (1983-05-01), Blaszyk et al.
patent: 4413882 (1983-11-01), Bailey et al.
patent: 4415230 (1983-11-01), Keck
patent: 4426129 (1984-01-01), Matsumura et al.
Y. Namihira et al., Electronics Letters, vol. 18, No. 2, Jan. 21, 1982, "Birefringence in Elliptical-Cladding Single-Polarisation Fibres", pp. 89-91.
T. Katsuyama et al., Electronics Letters, vol. 17, No. 13, Jun. 25, 1981, "Low-Loss Single-Polarisation Fibres", pp. 473-474.
Kajioka Hiroshi
Nakagawa Junkichi
Tokunaga Toshihide
Gonzalez Frank
Hitachi Cable Ltd.
Sikes William L.
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