Abstract
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.
Original language | English (US) |
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Pages (from-to) | 4672-4674 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 37 |
Issue number | 22 |
DOIs | |
State | Published - Nov 15 2012 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics