Title :
High-sensitivity pressure sensor using a shielded polymer-coated fiber Bragg grating
Author :
Zhang, Ying ; Feng, Dejun ; Liu, Zhiguo ; Guo, Zhuanyun ; Dong, Xiaoyi ; Chiang, K.S. ; Chu, Beatrice C B
Author_Institution :
Inst. of Modern Opt., Nankai Univ., Tianjin, China
fDate :
6/1/2001 12:00:00 AM
Abstract :
We demonstrate a novel high-sensitivity pressure sensor, which is based on the use of a fiber Bragg grating (FBG) embedded in a polymer-filled metal cylinder with an opening on one side to enhance the pressure sensitivity. The measured pressure sensitivity of the fractional change in the Bragg wavelength of our experimental sensor is -3.41/spl times/10/sup -3/ MPa/sup -1/ which is approximately 1720 times higher than that can be achieved with a bare FBG. The linearity of our sensor is also good. This sensor should find applications in the area of low-pressure measurement.
Keywords :
Bragg gratings; fibre optic sensors; optical fibre cladding; polymer films; pressure sensors; FBG; fractional change; high-sensitivity pressure sensor; linearity; low-pressure measurement; polymer-filled metal cylinder; pressure sensitivity; shielded polymer-coated fiber Bragg grating; Bragg gratings; Capacitive sensors; Fiber gratings; Glass; Linearity; Optical fiber sensors; Photoelasticity; Polymer films; Pressure measurement; Wavelength measurement;
Journal_Title :
Photonics Technology Letters, IEEE
