Optical fiber extrinsic Fabry-Perot interferometric strain sensor for multiple strain state measurements

Vikram Bhatia; Mallika B. Sen; Kent A. Murphy; Richard O. Claus; Mark E. Jones; Jennifer L. Grace; Tuan A. Tran; Jonathan A. Greene

doi:10.1117/12.207665

20 April 1995 Optical fiber extrinsic Fabry-Perot interferometric strain sensor for multiple strain state measurements

Vikram Bhatia, Mallika B. Sen, Kent A. Murphy, Richard O. Claus, Mark E. Jones, Jennifer L. Grace, Tuan A. Tran, Jonathan A. Greene

Author Affiliations +

Proceedings Volume 2444, Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation; (1995) https://doi.org/10.1117/12.207665
Event: Smart Structures and Materials '95, 1995, San Diego, CA, United States

Abstract

A modified design of the extrinsic Fabry-Perot interferometric (EFPI) optical fiber sensor, for complete characterization of multi-component strain fields, is proposed. The novel EFPI includes a sensor head with two input fibers such that the respective reflections from the output multimode fibers end face are in quadrature. Any strain field possessing a component along the line joining the axes of the two fibers causes the initial phase difference to be modulated. The measured changes in phase difference is employed to determine this transverse component of the strain field. Absolute measurements are possible using the AEFPI sensing system. Applications of the modified sensor-head to smart materials and structures are discussed.

Citation Download Citation

Vikram Bhatia, Mallika B. Sen, Kent A. Murphy, Richard O. Claus, Mark E. Jones, Jennifer L. Grace, Tuan A. Tran, and Jonathan A. Greene "Optical fiber extrinsic Fabry-Perot interferometric strain sensor for multiple strain state measurements", Proc. SPIE 2444, Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation, (20 April 1995); https://doi.org/10.1117/12.207665

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