Optical waveguides – Optical waveguide sensor – Including physical deformation or movement of waveguide
Patent
1996-10-07
1998-04-28
Bovernick, Rodney B.
Optical waveguides
Optical waveguide sensor
Including physical deformation or movement of waveguide
385128, 25022714, 25022718, G02B 6125
Patent
active
057456119
ABSTRACT:
An optical fiber pressure sensor for measuring a pressure on the basis of an optical power loss depending on a configuration change of an optical fiber comprising a luminescence device optically connected with at least an optical fiber which is constructed with a main part for propagating a light protective coating member for protecting the main part. A light intercepting device detects a light passing through the optical reflected light from the optical fiber. A bending device bends at least a part of the optical fiber according to a measured pressure. The optical fiber pressure sensor is characterized by being used when a normalization frequency V value of the optical fiber is smaller than 90% of a normalization cut-off frequency defining a single transmission mode condition of the optical fiber.
REFERENCES:
patent: 4822135 (1989-04-01), Seaver
patent: 5218419 (1993-06-01), Lipson et al.
patent: 5260566 (1993-11-01), Reed
patent: 5633494 (1997-05-01), Danisch
Fumino Takayuki
Komachiya Masahiro
Oho Shigeru
Sakaguchi Tatsunori
Sasayama Takao
Bovernick Rodney B.
Hitachi , Ltd.
Kang Ellen E.
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