1. Low-pressure fiber-optic sensor by polyester Fabry-Perot cavity and its phase signal processing analysis
- Author
-
Juan Manuel Sierra-Hernández, D. F. Garcia-Mina, Daniel Jauregui-Vazquez, M. Gutierrez-Rivera, Y. Lopez-Dieguez, Julian M. Estudillo-Ayala, Roberto Rojas-Laguna, and Elsevier
- Subjects
Polímeros ,Materials science ,Polymers ,Physics::Optics ,02 engineering and technology ,Optoelectronic devices ,01 natural sciences ,Pressure detection ,0103 physical sciences ,Electrical and Electronic Engineering ,Instrumentation ,010302 applied physics ,Dispositivos optoelectrónicos ,Signal processing ,Multi-mode optical fiber ,business.industry ,Metals and Alloys ,Fabry-Perot interferometers ,Detectors ,Fiber optic sensor ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Blueshift ,Wavelength ,Interferometry ,Optoelectronics ,Spatial frequency ,0210 nano-technology ,business ,Detectores ,Fabry–Pérot interferometer - Abstract
This manuscript presents the development of a low-pressure extrinsic Fabry-Perot fiber optic sensor based on a thin polyester film, using a phase signal analysis. The proposed interferometer is controlled by the simple contact interaction between the polymer membrane and a multimode fiber optic tip. The created cavity was uniformly stressed by applying a pressure varying from 0 to 2 psi. A finite element analysis was performed for these parameters. The stress applied to the membrane was below the yielding point. Thus, a linear study could be performed. The wavelength spectra exhibited a blue shift with a sensitivity of around 10.5 nm/psi. Although the interference spectra presented crosstalk measurements and required an initial set-point calibration, these effects were overcome by examining the spatial frequency components’ phase analysis. The sensors offered a high sensitivity, close to 3.5 rad/psi. Ultimately, this sensor is a high sensitivity and versatile alternative for low-pressure detection.
- Published
- 2020