Sensors 2012, 12(1), 415-428; doi:10.3390/s120100415

An Intrinsic Fiber-Optic Single Loop Micro-Displacement Sensor

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Received: 15 December 2011; in revised form: 26 December 2011 / Accepted: 28 December 2011 / Published: 4 January 2012
(This article belongs to the Special Issue Optical Fiber Sensors)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: A micro-displacement sensor consisting of a fiber-loop made with a tapered fiber is reported. The sensor operation is based on the interaction between the fundamental cladding mode propagating through the taper waist and higher order cladding modes excited when the taper is deformed to form a loop. As a result, a transmission spectrum with several notches is observed, where the notch wavelength resonances shift as a function of the loop diameter. The loop diameter is varied by the spatial displacement of one end of the fiber-loop attached to a linear translation stage. In a displacement range of 3.125 mm the maximum wavelength shift is 360.93 nm, with 0.116 nm/μm sensitivity. By using a 1,280 nm broadband low-power LED source and a single Ge-photodetector in a power transmission sensor setup, a sensitivity in the order of 2.7 nW/μm is obtained in ~1 mm range. The proposed sensor is easy to implement and has a plenty of room to improve its performance.
Keywords: fiber sensors; displacement sensor; tapered fiber; fiber loop
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MDPI and ACS Style

Martinez-Rios, A.; Monzon-Hernandez, D.; Torres-Gomez, I.; Salceda-Delgado, G. An Intrinsic Fiber-Optic Single Loop Micro-Displacement Sensor. Sensors 2012, 12, 415-428.

AMA Style

Martinez-Rios A, Monzon-Hernandez D, Torres-Gomez I, Salceda-Delgado G. An Intrinsic Fiber-Optic Single Loop Micro-Displacement Sensor. Sensors. 2012; 12(1):415-428.

Chicago/Turabian Style

Martinez-Rios, Alejandro; Monzon-Hernandez, David; Torres-Gomez, Ismael; Salceda-Delgado, Guillermo. 2012. "An Intrinsic Fiber-Optic Single Loop Micro-Displacement Sensor." Sensors 12, no. 1: 415-428.

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