Optical waveguides – Optical waveguide sensor
Patent
1996-09-25
1997-05-27
Ullah, Akm E.
Optical waveguides
Optical waveguide sensor
25022719, G02B 600
Patent
active
056339607
ABSTRACT:
An optical fiber which includes a light transmitting center portion, a prcting layer and a stress preventing layer. The protecting layer concentrically surrounds the center portion and the stress preventing layer concentrically surrounds the center portion and is positioned between the protecting layer and the center portion. The stress preventing layer has a Young's Modulus substantially lower than the Young's Modulus of the protecting layer. The optical fiber can be used in a sensor, wherein the sensor includes an encapsulant and the fiber is embedded in the encapsulant. The embedded fiber is arranged in a pancaked spiral configuration in the encapsulant. Alternatively, the embedded fiber can be arranged to form a plurality of sequential loops. The plurality of sequential loops are then arranged in the same plane as a spiral, where each of the plurality of sequential loops are perpendicular to the plane. A decoupler is also provided for attaching the sensor to a structure, to reduce stretching motion affecting the sensor.
REFERENCES:
patent: 4621896 (1986-11-01), Lagakos et al.
patent: 5140559 (1992-08-01), Fisher
patent: 5367376 (1994-11-01), Lagakos et al.
Bucaro Joseph A.
Lagakos Nicholas
Jameson George
McDonnell Thomas E.
The United States of America as represented by the Secretary of
Ullah Akm E.
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