Optical fiber cable for detecting low temperature

Details Optical fiber cable for detecting low temperature Optical fiber cable for detecting low temperature

G - Physics

01

K

73/52, 340/155.2

G01K 11/12 (2006.01)

Patent

CA 1227944

- 1 - Abstract: The invention provides an optical fiber cable for detecting a low temperature. The cable comprises a center member made of a material having a low coefficient of linear expansion having one or more longitudinally extending grooves in each of which at least one optical fiber is placed. In one embodiment, at least one optical fiber, which comprises a core and a cladding both made of silica glass, is placed in each of the grooves and optionally the internal space of the groove which is not occupied by the optical fiber or fibers is filled with a resin which has a low glass transition tempera- ture. Alternatively, in another embodiment, at least two optical fibers are placed in the grooves, the optical fibers having different coating structures from each other and/or different fiber structures from each other so as to detect a low temperature in different temperature ranges. Fibers capable of detecting lower temperatures more accurately are thus provided.

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