期刊论文

Tian, Jiajun

Han, M (reprint author), Univ Nebraska, Dept Elect Engn, Lincoln, NE 68588 USA.

Zhang, Qi,Fink, Thomas,Li, Hong,Peng, Wei,Han, Ming

2012-11-15

OPTICS LETTERS

SCIE、EI、Scopus

J

37

22

4672-4674

0146-9592

Intensity-based demodulation of extrinsic Fabry-Perot interferometric (EFPI) fiber-optic sensors requires the light wavelength to be on the quadrature point of the interferometric fringes for maximum sensitivity. In this Letter, we propose a novel and remote operating-point tuning method for EFPI fiber-optic sensors using microstructured fibers (MFs) and gas pressure. We demonstrated the method using a diaphragm-based EFPI sensor with a microstructured lead-in fiber. The holes in the MF were used as gas channels to remotely control the gas pressure inside the Fabry-Perot cavity. Because of the deformation of the diaphragm with gas pressure, the cavity length and consequently the operating point can be remotely tuned for maximum sensitivity. The proposed operating-point tuning method has the advantage of reduced complexity and cost compared to previously reported methods. (C) 2012 Optical Society of America