| 摘要 |
A fiber optic core cladded with a material having an index of refraction lower than the core material and light sensing means located along the length of the core and cladding material. The sensing means receives light which escapes into the cladding from the core when the fiber optic is stressed, and produces an output in response to light received. Measurement of the output provides both magnitude and location information with respect to stresses in the fiber optic. A measurement of fiber temperature by detection of dark current, which is the function of temperature, is effected in pixels of the sensing means located in intimate contact with the fiber. An accurate measurement of stress in the fiber is made by subtracting dark current measurements from stress measurements when the fiber optic is excited with light.
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