Double F-P interference optical fiber high temperature gas pressure sensor based on suspended core fiber
Document Type
Article
Publication Date
12-1-2021
Abstract
A compact and simple double F-P interference optical fiber optic gas pressure sensor based on suspended core structure is proposed and demonstrated. The sensor is formed by splicing a Section of thin-walled grapefruit photonic crystal fiber (G-PCF) with single-mode fiber (SMF). By adjusting the special fusion parameters, a short air-cavity region is formed in the G-PCF next to the splicing point with the SMF segment, and the other end of the G-PCF segment is open to the atmosphere. The output interference spectrum of the sensor comprises of two spectral parameters that have different sensitivities to temperature and gas pressure. One of them is the wideband envelope that is associated with the air-cavity and it is only sensitive to the gas pressure but insensitive to the change of ambient temperature. This property is particularly useful for addressing the complex temperature-pressure cross sensitivity of both spectral parameters. The research findings indicate that the sensor can perform an accurate measurement for gas pressure in dynamic range of 0-1.0 MPa under the high temperature condition up to 500 degrees C.
Keywords
Sensors, Optical fiber sensors, Temperature sensors, Optical fibers, Temperature measurement, Sensitivity, Interference, Fiber-optic high temperature gas pressure sensor, suspended core fiber, double F-P interference
Divisions
photonics
Funders
Science Technology Plan of Shaanxi [2020GY-187],Northwest University Young Scientist Support Program [NJ00089],Scientific Research Program of Shaanxi Provincial Department of Education [21JK0945]
Publication Title
IEEE Sensors Journal
Volume
21
Issue
23
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Publisher Location
445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA