Fabry-PÉrot Cavity Based on a Suspended-Core Fiber for Strain and Temperature Measurement

• Published in: IEEE photonics technology letters Vol. 21; no. 17; pp. 1229 - 1231
• Main Authors: Frazao, O., Aref, S.H., Baptista, J.M., Santos, J.L., Latifi, H., Farahi, F., Kobelke, J., Schuster, K.
• Format: Journal Article
• Language: English
• Published: IEEE 01-09-2009
• Subjects: Capacitive sensors; Fabry-PÉrot (FP) interferometer; microstructured fiber; Optical fiber devices; optical fiber sensor; Optical fiber sensors; Optical fibers; Optical interferometry; Photonic crystal fibers; Sensor phenomena and characterization; Strain measurement; Temperature measurement; Temperature sensors
• ISSN: 1041-1135; 1941-0174
• DOI: 10.1109/LPT.2009.2024645

A fiber-optic Fabry-Perot sensing structure based on the utilization of a suspended-core fiber is presented. The interferometric structure is formed when a small length of the suspended-core fiber is spliced to the end of a standard single-mode fiber. The interfering waves are generated by the refractive-index mismatches between the two fibers in the splice region and at the end of the suspended-core fiber. Thermal and strain responses of two different sensing heads associated with suspended-core fibers with three and four holes are characterized.