Application of a Photonic Crystal Fiber LPG for vibration monitoring

• Type: Article in International Conference Proceedings Book
• Date: 2013

Authors

Nascimento, IM (Author) Other; Chesini, G (Author) Other; Sousa, M (Author) Other; Osorio, JH (Author) Other; Baptista, JM (Author) Other; Cordeiro, CMB (Author) Other; Jorge, PAS (Author) FCUP

Conference proceedings International

Title: FIFTH EUROPEAN WORKSHOP ON OPTICAL FIBRE SENSORS

5th European Workshop on Optical Fibre Sensors

Krakow, POLAND, MAY 19-22, 2013

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Other information

Authenticus ID: P-006-FTX

DOI: 10.1117/12.2026723

Abstract (EN): A fiber optic sensor based on a long-period grating (LPG) inscribed in a photonic crystal fiber is investigated for vibration sensing for structural monitoring applications. In this paper, preliminary results are shown demonstrating the sensor ability to detect vibration induced in a test structure. The sensor frequency response when attached to a loudspeaker-acrylic plate stimulation system (tested in the range from 40 Hz to 2.5 kHz) is analyzed using an intensity based scheme with a tunable laser. An alternative interrogation scheme, where the vibration signal is retrieved from a spectral scan, is also demonstrated and analyzed showing promising characteristics for structural health monitoring.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4