Spatially resolving fiber-optic crosstalk strain sensor
First Claim
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1. A strain sensing apparatus comprising an optical waveguide including first and second light-guiding cores for carrying at least a single mode of light, fixedly mounted with respect to a mechanical structure;
- a multiwavelength light source for simultaneously launching light into both of said cores for propagation therealong and for providing crosstalk between said cores which modifies the light propagating along each of said cores in a manner dependent on the stressing of said waveguide; and
a detection system for responding to the crosstalk between said first and second light-guiding cores, including means for comparing light from said cores to establish a contrast relationship with respect to said wavelengths indicative of the locations and degrees of distributed stresses in said mechanical structure along said waveguide.
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Abstract
An optical strain measuring arrangement including an optical waveguide comprising first and second cores fixedly mounted with respect to a mechanical structure to be monitored, and a detection system for relating the contrast in light intensity emerging from said cores to a range of wavelengths to establish an indication of strain along the range of the optical waveguide.
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2 Claims
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1. A strain sensing apparatus comprising an optical waveguide including first and second light-guiding cores for carrying at least a single mode of light, fixedly mounted with respect to a mechanical structure;
- a multiwavelength light source for simultaneously launching light into both of said cores for propagation therealong and for providing crosstalk between said cores which modifies the light propagating along each of said cores in a manner dependent on the stressing of said waveguide; and
a detection system for responding to the crosstalk between said first and second light-guiding cores, including means for comparing light from said cores to establish a contrast relationship with respect to said wavelengths indicative of the locations and degrees of distributed stresses in said mechanical structure along said waveguide. - View Dependent Claims (2)
- a multiwavelength light source for simultaneously launching light into both of said cores for propagation therealong and for providing crosstalk between said cores which modifies the light propagating along each of said cores in a manner dependent on the stressing of said waveguide; and
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Current AssigneeUnited Technologies Corporation (Raytheon Technologies Corporation d/b/a RTX)
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Original AssigneeUnited Technologies Corporation (Raytheon Technologies Corporation d/b/a RTX)
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InventorsDunphy, James R., Meltz, Gerald, Snitzer, Elias
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Primary Examiner(s)McGraw, Vincent P.
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Application NumberUS06/640,491Time in Patent Office960 DaysField of Search356/32, 250/227US Class Current356/32CPC Class CodesG01L 1/243 using means for applying fo...
