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We proposed and experimentally demonstrated five kinds of gas pressure sensors based on in-fiber devices, including a long period fiber grating written in air-core bandgap fiber, a fiber-tip air bubble, a polymer-capped Fabry-Perot interferometer, an inflated long period fiber grating and a twin-core fiber-based Mach-Zehnder interferometer, which exhibited a sensitivity of 137, 1036, 1130, 1680, 9600...
We reported a gas pressure sensor based on CO2-laser-induced long period fiber grating (LPFG) in an air-core photonic bandgap fiber (PBF). The LPFG was inscribed by use of an improved CO2 laser system with an ultra-precision two-dimensional scanning technique, which produced single side periodic collapses in the micro-structured cladding of the air-core PBF. Such LPFG was utilized to measure the gas...
We proposed and experimentally demonstrated four kinds of high-sensitivity gas pressure sensors based on in-fiber devices, including a sub-micron silica diaphragm-based fiber-tip, a polymer-capped Fabry-Perot interferometer, an inflated long period fiber grating and a twin core fiber-based Mach-Zehnder interferometer, which have sensitivities of 1036, 1130, 1680, 9600 pm/MPa, respectively.
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