| 摘要 |
A transducer and measurement system includes a fiber Bragg grating which has a regular variation of spacing of partially reflecting surfaces, known as a chirp, either formed or induced therein and which is capable of reflecting energy having a predetermined wavelength. When the fiber Bragg grating is subjected to a strain, such as by a change in dimension or shape of a transducing element to which it is attached with change of a physical parameter to which the transducing element or the fiber Bragg grating is exposed, the location within the fiber Bragg grating which effectively reflects the predetermined wavelength will be formed (e.g. when the chirp is induced) or altered as the strain alters spacing of partially reflecting surface within the fiber Bragg grating allowing long optical fibers, such as are used in magnetometers and hydrophones, to be simulated with short optical fibers including a fiber Bragg grating.
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