Title :
A novel FBG sensing head geometry for strain-temperature discrimination
Author :
Zhou, Wenjun ; Zhao, Chun-liu ; Huang, Jie ; Shen, Weimin ; Dong, Xinyong
Author_Institution :
Institute of Optoelectronic Technology, China Jiliang University, Hangzhou, China, 310018
Abstract :
A novel FBG sensing head geometry with half corroded by hydrofluoric acid and half kept intact for strain-temperature discrimination has been proposed. Utilizing different diameters of two halves of the gratings, different strain sensitivities are achieved (≈50% difference) while temperature sensitivities remain the same. The maximum experimental errors obtained were within ±5.49 µε and ±1.6 °C, respectively. The design has not only realized the simultaneous measurement of temperature and strain, but also obtained the temperature insensitive measurement.
Keywords :
Bragg gratings; Capacitive sensors; Fiber gratings; Geometry; Optical reflection; Refractive index; Strain measurement; Temperature measurement; Temperature sensors; Wavelength measurement; FBG sensing head; half corroded FBG; simultaneous measurement; temperature-independent sensor;
Conference_Titel :
Communications and Photonics Conference and Exhibition (ACP), 2009 Asia
Conference_Location :
Shanghai, China
Print_ISBN :
978-1-55752-877-3
Electronic_ISBN :
978-1-55752-877-3
