Title :
Ultrathin FBG Pressure Sensor With Enhanced Responsivity
Author :
Zhang, W.T. ; Li, F. ; Liu, Y.L. ; Liu, L.H.
Author_Institution :
Chinese Acad. of Sci., Beijing
Abstract :
An ultrathin fiber Bragg grating pressure sensor with enhanced sensitivity is demonstrated. A novel piston-like diaphragm with a hard core in the center is used as the sensing element to enhance the responsivity. Both the theoretical analysis and the experimental results show that the Young´s modulus of the diaphragm and the radius of the hard core have significant effect on the pressure responsivity. By optimizing these two parameters, a pressure responsivity of 7 nm/MPa has been achieved.
Keywords :
Bragg gratings; fibre optic sensors; pressure sensors; Young modulus; enhanced responsivity; hard core; piston-like diaphragm; pressure sensor; ultrathin fiber Bragg grating; Bragg gratings; Capacitive sensors; Copper; Fiber gratings; Integrated optoelectronics; Optical fiber sensors; Petroleum; Polymer films; Pressure measurement; Rubber; Diaphragm; fiber Bragg grating (FBG); pressure sensor;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.903542
