Systems and methods for low-loss splicing of optical fibers

Details Systems and methods for low-loss splicing of optical fibers Systems and methods for low-loss splicing of optical fibers

2005-01-11

2005-01-11

Palmer, Phan T. H. (Department: 2874)

Optical waveguides

With splice

C385S096000, C385S097000

Reexamination Certificate

active

06840687

ABSTRACT:
Techniques and systems are described for reducing splice loss in an optical fiber transmission line. One described technique includes splicing together at a splice point a first fiber having a first modefield diameter to a second fiber having a second modefield diameter larger than the first modefield diameter. The splice point is heated to a core expansion temperature to cause a controlled thermal diffusion of core dopant in the first fiber in order to reduce modefield mismatch between the first and second fibers. Splice loss is then reduced by heating the splice point to a differential diffusion temperature to cause a controlled diffusion of a cladding dopant in the first fiber, while maintaining the expanded core.

REFERENCES:
patent: 4326870 (1982-04-01), Bendit et al.
patent: 6336749 (2002-01-01), O'Toole et al.
patent: 6565269 (2003-05-01), Riis et al.
patent: 20010022879 (2001-09-01), Wu

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