Intrinsic Fabry-Perot Cavity Sensor Based on Etched Multimode Graded Index Fiber for Strain and Temperature Measurement

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Paula A R Tafulo (Author) Other; Pedro. A S Jorge (Author) FCUP; Jose Luis Santos (Author) FCUP; Francisco M Araujo (Author) Other; Orlando Frazao (Author) FCUP

Journal

Title: IEEE Sensors Journal

Vol. 12

Pages: 8-12

ISSN: 1530-437X

Publisher: IEEE

Indexing

ISI Web of Knowledge - 54 Citations

Scopus - 61 Citations

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

Other information

Authenticus ID: P-002-HHD

DOI: 10.1109/jsen.2011.2107737

Abstract (EN): Two Fabry-Perot interferometers based on chemical etching in multimode graded index fibers are fabricated and their response to temperature and strain are compared. Chemical etching is applied in the graded index fiber end creating an air cavity. The interferometric cavity is formed when the graded index fiber with the air concavity is spliced to a single-mode fiber. The intrinsic sensors present high sensitivity to strain and low sensitivity to temperature. For the 62.5 mu m core fiber, sensitivities of 6.99 pm/mu epsilon and, 0.95 pm/degrees C were obtained for strain and temperature, respectively. The sensor based in the 50 mu m core fiber, on the other hand, presented sensitivities of 4.06 pm/mu epsilon and -0.84 pm/degrees C for strain and temperature, respectively.

Language: English

Type (Professor's evaluation): Scientific