The Furukawa Electric Co., Ltd.

Nippon Telegraph and Telephone Public Corporation

Seikoh Giken Co., Ltd.

Toshiaki Kuroha

Masao Kawachi

Naotoshi Shiokawa

Nobuo Inagaki

Ryoichi Hara

Shintaro Sentsui

Tadashi Miyashita

Yasuro Furui

An eccentric optical fiber connector ferrule according to the present invention comprises an optical fiber in which a coating at an end thereof is removed to expose the end of the fiber, a metallic coating bonded to a part of a side face at the end of the optical fiber in an axial direction, and a ferrule receiving the end of the optical fiber, to which the metallic coating is bonded, in a central hole, for supporting it while applying a specified eccentricity. By recessing the optical fiber end face of the eccentric optical fiber connector ferrule from the ferrule end face by 0.2 to 2.0 &mgr;m, the damage at the end of the optical fiber can be prevented.

Eccentric optical fiber connector ferrule and method of manufacturing the same

A method of fabricating an optical glass base material by injecting and depositing fine glass particles produced by chemically reacting glass stock which comprises means for growing the fine glass particles in a depositing direction to form porous rod-shaped base material, support means for supporting the porous rod-shaped base material after growing, and heat treatment means for sintering at least the outer periphery of the rod-shaped base material in a semisintering state before supporting the rod-shaped base material by said support means to harden the same. Thus, since the rod-shaped base material is held in the stable state through the support means, the mechanical strength of the base material is strengthened strength by the semisintering hardening through the heat treating means before being supported by the support means, the base material is not deformed nor damaged in the supported state, and a large base material may be fabricated.

Method of fabricating optical glass base material and apparatus for

The invention relates to a single-mode optical fiber used in a long wavelength band range for optical telecommunication. The core and the cladding of this optical fiber contain P.sub.2 O.sub.5 as a dopant selected to lower the deposition temperature and to hasten the deposition speed so as to result in low absorption loss.

Single-mode optical fiber

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Yokohama, Japan

Toshiaki Kuroha