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To remedy this limitation, we will, through experimental and numerical methods, investigate two approaches to enhance the sensitivity of fiber optic acoustic pressure sensors using graphene film.
In the first half of this thesis, I present a highly sensitive fiber optic acoustic sensor that meets these requirements by utilizing a high-reflectivity photonic-crystal diaphragm 450 nm thick to convert the
The diaphragm fiber optic sensor (DFOS) solely based on Fabry-Perot multiple beam interference has been designed and fabricated with Micro-electric mechanical system (MEMS) technology.
We have reported a graphene diaphragm based optical fiber sensor array, as well as the coherent phase demodulation system to achieve real-time multipoint acoustic detection.
An all-silica Diaphragm-based miniature optical fiber pressure sensor based on the Fabry-Perot (FP) interferometric principle is proposed. The FP structure is composed of a single-mode fiber
In the diaphragm-embedded FBG force or pressure sensors, the sensitivity is related to the material''s elastic modulus, since the sensor is based on the stress/strain transmission between the diaphragm
Here, a diaphragm based optical fiber sensor array is proposed, in which each sensor tip is made of 10-layer graphene diaphragm and optical fiber pigtail, with the compact size of about...
A fiber Bragg grating (FBG) sensor capable of simultaneous temperature-pressure measurement is presented and experimentally verified, which consists of a diaphragm, a special
Aiming at the current pressure monitoring requirement in the energy and chemical industry, combined with the principle of fiber double grating sensing, a ber optic pressure sensor is designed and
This is the first time to theoretically demonstrate large-scale acoustic sensor array for diaphragm based fiber sensor by phase detection for time division multiplex (TDM), and the
Especially in the application of miniature fiber-optic pressure sensors, the introduction of the corrugated structure gives the sensor high sensitivity, large dynamic range, good linearity, small
A new type of fiber-optic sensor that determines pressure from a diaphragm displacement is discussed. This sensing technique automatically compensates for variation in the source intensity,
In this article, we thoroughly discuss many aspects of diaphragm-embedded optical fiber sensors covering industrial, robotics and medical applications: from the modeling to field applications, which
Abstract Intensity based fiber optic pressure sensor has been fabricated using micromachining technology. The sensor consists of a multimode fiber bundle and a 100nm-Au/30nm-
In this paper, we propose a corrugated diaphragm applied to the fiber optic pressure sensor which needs a wide sensing range and a large deflection. The corrugated diaphragm can effectively
By employing the proposed sensor structure, the influence of prestress on the resonance frequency and the sensitivity of optical fiber acoustic sensor can be investigated theoretically and
A novel spiral-beams supported diaphragm extrinsic Fabry-Pérot interferometer (EFPI) sensor is proposed and applied to four-channel acoustic source track tracki
Together with fiber-optic Fabry–Perot interferometric''s inherent advantages, the chitosan diaphragm-based Fabry–Perot sensor becomes a wonderful candidate for dynamic pressure
The general theory of a diaphragm fiber-optic sensor (DFOS) is proposed. We use a critical test to determine if a DFOS is based on Fabry-Perot interference or intensity modulation.