Low-cost lateral force sensor based on a core-offset multimode fiber interferometer with intensity based interrogation technique

Da-Peng Zhou; Bo Dong; Li Wei; Wing-Ki Liu; John W. Y. Lit

doi:10.1117/12.818989

27 April 2009 Low-cost lateral force sensor based on a core-offset multimode fiber interferometer with intensity based interrogation technique

Da-Peng Zhou, Bo Dong, Li Wei, Wing-Ki Liu, John W. Y. Lit

Author Affiliations +

Proceedings Volume 7316, Fiber Optic Sensors and Applications VI; 73160U (2009) https://doi.org/10.1117/12.818989
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

Abstract

A novel lateral force sensor based on a core-offset multimode fiber interferometer with intensity-based interrogation technique is reported. An offset between the cores of the single-mode fiber and multimode fiber is made to produce high extinction ratio. When a lateral force is applied to a short section of the multimode fiber, the extinction ratio decreases with the interference phase almost unchanged. In addition to serving as a sensing head, the multimode fiber can also act as a filter to realize lateral force measurement by determining the power change from a power meter. Experimental results show that the power ratio change has a linear relationship with respect to the applied lateral force, and the resolution of the sensor configuration is about 0.01 N.

Citation Download Citation

Da-Peng Zhou, Bo Dong, Li Wei, Wing-Ki Liu, and John W. Y. Lit "Low-cost lateral force sensor based on a core-offset multimode fiber interferometer with intensity based interrogation technique", Proc. SPIE 7316, Fiber Optic Sensors and Applications VI, 73160U (27 April 2009); https://doi.org/10.1117/12.818989

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KEYWORDS

Sensors

Interferometers

Multimode fibers

Head

Single mode fibers

Fiber optics sensors

Power meters

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