Increasing the cladding-to-core ratio (D/d) of low D/d ratio...

Details Increasing the cladding-to-core ratio (D/d) of low D/d ratio... Increasing the cladding-to-core ratio (D/d) of low D/d ratio...

2007-05-09

2010-11-23

Nguyen, Khanh (Department: 1791)

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

Process of manufacturing optical fibers, waveguides, or...

C065S414000, C065S421000, C065S428000, C065S429000

Reexamination Certificate

active

07836728

ABSTRACT:
An optical fiber preform is fabricated by inserting a number of core body pieces end-to-end inside a glass cylinder, wherein the pieces may have a cladding-to-core diameter (D/d) ratio within the range of one to four. The cylinder with the inserted core body pieces is mounted vertically on a furnace and heated so that the cylinder becomes elongated and its outside diameter collapses to form a core rod from which core rod sections with D/d ratios greater than five, can be cut. A soot overcladding is deposited on the circumference of a core rod section until the diameter of the deposited soot builds to a determined value. The core rod section with the deposited soot overcladding is consolidated to obtain a finished optical fiber preform. The preform preferably has a D/d ratio of about 15 or more, and an optical fiber may be drawn directly from the preform.

REFERENCES:
patent: 4195980 (1980-04-01), Sterling et al.
patent: 4407667 (1983-10-01), Le Noane et al.
patent: 6131414 (2000-10-01), Shimizu et al.
patent: 6131415 (2000-10-01), Chang et al.
patent: 6434975 (2002-08-01), Berkey
patent: 6460378 (2002-10-01), Dong et al.
patent: 6574994 (2003-06-01), Cain et al.
patent: 2006/0216527 (2006-09-01), Fletcher, III
patent: 1632460 (2006-03-01), None

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