SYSTEM AND METHOD FOR PREVENTING STRAIN CAUSED ERRORS IN FIBER OPTIC SENSORS
First Claim
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1. A fiber optic sensor comprising:
- a hollow tube;
an optical fiber installed within a lumen of the hollow tube; and
a substance for controlling a coefficient of friction between a wall of the lumen of the hollow tube and the optical fiber is disposed about the optical fiber within the hollow tube;
an array of fiber Bragg gratings formed within a section of the optical fiber.
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Abstract
An encapsulated fiber Bragg grating sensor is provided wherein the EFL of sensor as well as the coefficient of friction between the sensor and the encapsulating tubing is controlled to minimize measurement errors caused by tensile and compressive strains. A method of manufacturing such a sensor is also provided.
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Citations
12 Claims
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1. A fiber optic sensor comprising:
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a hollow tube; an optical fiber installed within a lumen of the hollow tube; and a substance for controlling a coefficient of friction between a wall of the lumen of the hollow tube and the optical fiber is disposed about the optical fiber within the hollow tube; an array of fiber Bragg gratings formed within a section of the optical fiber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of manufacturing and encapsulating a fiber optic sensor to provide for a controlled amount of friction between the array and the encapsulating tube, comprising:
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disposing a length of optical fiber within a tube, the length of optical fiber including at least one Bragg grating disposed therein; disposing a substance for controlling a coefficient of friction between the length of the fiber array and an inner wall of the tube; sealing the ends of the tube. - View Dependent Claims (11, 12)
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Specification