9 November 2010 A novel multi-path combination matching Michelson interferometer for straindeformation sensing
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Abstract
Based on low-coherence white light interferometric technology, a novel multi-path combination matching Michelson interferometer system has been proposed and demonstrated. The multi-path combination Michelson interferometer is configured by a series 2x2 fiber optic coupler connected each other. One end of the coupler array is connected with SLD light source in one port, the other port is linked with a photodiode detector. The other end of the 3dB fiber coupler array is with a coated reflective mirror in one port, the other port is terminated with a fiber collimator, and a reflective scanning mirror mounted on a translation stage and perpendicular to the fiber collimator. The scanning mirror is moving back and forth to match each optical path of the combination Michelson interferometer. In this multi-path combination Michelson interferometer, each fiber arm could be used as strain or deformation sensor. By using optical path tracking and recording technique, the quasi-distributed strain of each fiber arm can be calculated. The sensing system can be used to measure distribution strain or temperature. It has the potential in the applications of large scale smart structures health monitoring.
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Haili Jiang, Haili Jiang, Yonggui Yuan, Yonggui Yuan, Jun Yang, Jun Yang, Libo Yuan, Libo Yuan, } "A novel multi-path combination matching Michelson interferometer for straindeformation sensing", Proc. SPIE 7853, Advanced Sensor Systems and Applications IV, 785336 (9 November 2010); doi: 10.1117/12.870382; https://doi.org/10.1117/12.870382
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