Mode field diameter conversion optical fiber

Details Mode field diameter conversion optical fiber Mode field diameter conversion optical fiber

1993-07-29

1995-08-29

Gonzalez, Frank

Optical waveguides

Optical fiber waveguide with cladding

385 50, 385124, 385125, 65385, G02B 610

Patent

active

054468205

ABSTRACT:
An object of this invention is to provide a mode field diameter conversion optical fiber which can be processed in a short period of time to have a reduced mode field diameter at a desired portion thereof. The optical fiber according to this invention comprises a core of silica glass having a residual tensile stress, and a cladding surrounding the core and having a lower refractive index than that of the core. The desired portion is heated to relax the residual tensile stress in the core, whereby the optical fiber has a reduced mode field diameter at the desired portion.

REFERENCES:
patent: 4413882 (1983-11-01), Bailey et al.
patent: 4669821 (1987-06-01), Blair et al.
patent: 4784465 (1988-11-01), Berkey
patent: 4978201 (1990-12-01), Yamada et al.
patent: 5216728 (1993-06-01), Charlton et al.
Patent Abstracts of Japan, vol. 14, No. 372 (P-1091) 10 Aug. 1990 & JP-A-02 139 504 (Fujikura Ltd.) 29 May 1990.
Hanafusa et al, "Termally-Diffused Expanded Core Fibers for Low-Loss and Inexpensive Photonic Components", Electronics Letters, vol. 27, No. 21, 10 Oct. 1991, pp. 1968-1969.

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