Noncontact Ultrasonic Detection in Low-Pressure Carbon Dioxide Medium Using High Sensitivity Fiber-Optic Fabry–Perot Sensor System

Jiang, Junfeng; Zhang, Tianhao; Wang, Shuang; Liu, Kun; Li, Chao; Zhao, Zixu

doi:10.1109/jlt.2017.2765693

Cited by 32 publications

(17 citation statements)

References 19 publications

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“…Accordingly, it can be assumed that the magnitude and direction of the tension at each position on the circular diaphragm are the same. According to [19], the resonance frequency of the diaphragm is given by…”

Section: F-p Acoustic Sensor Structurementioning

confidence: 99%

“…Some fiber-optic acoustic sensors, such as all-optical fibers [11], Mach-Zehnder interferometers [12], Michelson interferometers [13] and extrinsic F-P interferometer sensors, have attracted significant research interest. Among these sensors, the discrete fiber-optic extrinsic F-P interferometer acoustic sensor is one of the most widely used sensors for the detection of infrasound [14][15][16][17], audible sound [18] and ultrasound [19,20] due to its simple structure and demodulation scheme. It has been reported that the sensitivity of the polymer-membrane F-P sensor is very high for infrasound detection, while the lower limit of the detectable frequency is approximately 1.00 Hz [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Filter-Based Differential Pressure Fiber-Optic Fabry-Perot Infrasound Sensor

et al. 2021

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A differential pressure fiber optic infrasound sensor based on a mechanical filter was developed, for the detection of infrasound within the frequency range of 0.01-1 Hz. The sensing unit employs a miniature polyphenylene sulfide (PPS) diaphragm which is fixed onto a glass ferrule. An extrinsic Fabry-Perot (F-P) interferometer was fabricated between the optical fiber end face and the PPS diaphragm, and a mechanical filter structure introduced to improve the minimum detectable frequency down to 0.005 Hz. Experimental results indicate that this infrasound sensor shows a favorable frequency response for infrasound signals between 0.01 and 1 Hz, and it exhibits an average minimum detectable pressure (MDP) of 88.85 mPa• Hz -1/2 . Our platform provides a promising solution for sensors in infrasound signal detection applications.

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Section: F-p Acoustic Sensor Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical Filter-Based Differential Pressure Fiber-Optic Fabry-Perot Infrasound Sensor

et al. 2021

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“…Membrane-based F-P sensor has become more and more popular, because the elastic membrane is more sensitive to the vibration of the acoustic wave. Several types of elastic materials have been used as the pressure-sensitive membrane, such as polymer [9], [10], silver [11]- [13], silicon [14], [15] and graphene [16]- [18]. However, these sensors are mainly focused on the measurement of the acoustic signal.…”

Section: Introductionmentioning

confidence: 99%

A Compact Fiber Optic Fabry–Perot Sensor for Simultaneous Measurement of Acoustic and Temperature

Liu

Wang

et al. 2019

IEEE Photonics J.

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A compact fiber optic Fabry-Perot (F-P) sensor for simultaneous acoustic and temperature measurement has been proposed in the research. The sensor consists of silicon-glass-silicon sandwich structure by anodic bonding. The air F-P cavity with a circular hole and slots utilizes the deformation of the silicon membrane to realize acoustic measurement, and the silicon F-P cavity utilizes the temperature sensitivity of the refractive index of silicon to realize temperature measurement. The acoustic signal and temperature information could be recovered by acoustic and temperature demodulation method, respectively. The experimental results demonstrate that the sensor has a signal-to-noise ratio (SNR) of 53 dB and the acoustic sensitivity of 4.65 mV/Pa at 21 kHz, and the temperature sensitivity of 123.10 nm/°C at 20°C∼120°C. The proposed fiber optic F-P sensor has great potential for simultaneous acoustic and temperature measurement in aviation, due to its compact structure, mass production and immunity to electromagnetic interference.

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“…The diaphragm, as one of the reflecting mirrors constructing the Fabry–Perot (FP) cavity, is critical to the sensor’s performance and especially its sensitivity. Different materials have been employed to fabricate a highly responsive diaphragm, including silicon [ 3 , 4 ], silver [ 5 , 6 ], polymer [ 7 , 8 , 9 , 10 ], and graphene [ 11 , 12 ]. Our previous work [ 13 ] showed that a thinner diaphragm with a smaller radius will result in a larger deformation at a determined resonant frequency; thus, such diaphragms show promise for detecting a weak signal.…”

Section: Introductionmentioning

confidence: 99%

Directional Sensitivity of a MEMS-Based Fiber-Optic Extrinsic Fabry–Perot Ultrasonic Sensor for Partial Discharge Detection

et al. 2018

Sensors

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Extrinsic Fabry–Perot (FP) interferometric sensors are being intensively applied for partial discharge (PD) detection and localization. Previous research work has mainly focused on novel structures and materials to improve the sensitivity and linear response of these sensors. However, the directional response behavior of an FP ultrasonic sensor is also of particular importance in localizing the PD source, which is rarely considered. Here, the directional sensitivity of a microelectromechanical system (MEMS)-based FP ultrasonic sensor with a 5-μm-thick micromechanical vibrating diaphragm is experimentally investigated. Ultrasonic signals from a discharge source with varying incident angles and linear distances are measured and analyzed. The results show that the sensor has a 5.90 dB amplitude fluctuation over a ±60° incident range and an exciting capability to detect weak PD signals from 3 m away due to its high signal–noise ratio. The findings are expected to optimize the configuration of a sensor array and accurately localize the PD source.

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Noncontact Ultrasonic Detection in Low-Pressure Carbon Dioxide Medium Using High Sensitivity Fiber-Optic Fabry–Perot Sensor System

Cited by 32 publications

References 19 publications

Mechanical Filter-Based Differential Pressure Fiber-Optic Fabry-Perot Infrasound Sensor

Mechanical Filter-Based Differential Pressure Fiber-Optic Fabry-Perot Infrasound Sensor

A Compact Fiber Optic Fabry–Perot Sensor for Simultaneous Measurement of Acoustic and Temperature

Directional Sensitivity of a MEMS-Based Fiber-Optic Extrinsic Fabry–Perot Ultrasonic Sensor for Partial Discharge Detection

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