Temperature-independent strain sensor based on a Hi-Bi photonic crystal fiber loop mirror

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Frazao, O (Author) Other; Baptista, JM (Author) Other; Santos, JL (Author) FCUP

Journal

Title: IEEE Sensors Journal

Vol. 7

Pages: 1453-1455

ISSN: 1530-437X

Publisher: IEEE

Indexing

ISI Web of Knowledge - 106 Citations

Scopus - 129 Citations

Scientific classification

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

Other information

Authenticus ID: P-004-7SN

DOI: 10.1109/jsen.2007.904884

Abstract (EN): This work presents an optical sensor based on a highly birefringent photonic crystal fiber (Hi-Bi PCF) loop mirror. The length of the sensing head is 380 mm and its corresponding wavelength spacing between two interferometer minima is 8 nm. The optical sensor was characterized in strain and in temperature with an uncoated Hi-Bi PCF and with an acrylate coated Hi-Bi PCF. Different results for strain and temperature sensitivity were obtained. Relatively to the strain measurement, the sensor with the uncoated Hi-Bi PCF presents slightly less sensitivity (1.11 pm/mu epsilon) when compared with coated Hi-Bi PCF (1.21 pm/mu epsilon). For the temperature measurement and with the uncoated Hi-Bi PCF, the optical sensor is insensitive to temperature (0.29 pm/K).

Language: English

Type (Professor's evaluation): Scientific