Method for preparing an optical fibre, optical fibre and use...

Details Method for preparing an optical fibre, optical fibre and use... Method for preparing an optical fibre, optical fibre and use...

2007-01-30

2007-01-30

Pak, Sung (Department: 2874)

Optical waveguides

Optical fiber waveguide with cladding

Utilizing multiple core or cladding

C385S037000, C065S430000

Reexamination Certificate

active

10480374

ABSTRACT:
Methods for coating an optical fiber with optical fiber Bragg grating (FBG) with a hermetic coating, particularly a coating of carbon, are employed to avoid ingress of gases, vapors or fluids in the ambient environment. This ingress can be from water or hydrogen, which can diffuse in the fiber glass and cause deviation/drift in the measured Bragg measurements. Bragg gratings that maintain the grating strength at temperatures in excess of 1000° C. are used and can be formed by heating the fiber above 1000° C. in a chamber with a reactive gas that produces deposition of carbon.

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