Review of high sensitivity fibre-optic pressure sensors for low pressure sensing

Vorathin, E.; Hafizi, Z. M.; Ismail, Norfarah Nadia; Loman, M.

doi:10.1016/j.optlastec.2019.105841

Cited by 119 publications

(42 citation statements)

References 190 publications

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“…The pressure sensitivity of a bare FBG sensor is 3.04 pm/MPa [ 25 ], which is too low to be employed for the practical applications. To improve the FBG pressure sensitivity, several mechanical systems incorporating FBG sensing technology have been proposed, such as FBG embedded in a polymer [ 26 , 27 ], metal coated FBG on a cylinder [ 28 ], and FBG bonded on a triangular cantilever [ 29 ]. However, some of the methods involve relatively complicated structures which are not easy to be prepared and multiplexed in single optical fiber.…”

Section: Introductionmentioning

confidence: 99%

Fiber Bragg Grating Pressure Sensor Integrated with Epoxy Diaphragm

Her

Weng

2021

Sensors

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A fiber Bragg grating (FBG) sensor integrated with an epoxy diaphragm was developed for the measurement of pressure and water level. The bending strain of a circular diaphragm induced by uniform pressure was transferred to the FBG sensor. The response of the FBG sensor to the pressure was observed in terms of the Bragg wavelength shift which is linearly proportional to the strain. The effect of epoxy diaphragm thickness on the sensitivity and accuracy was investigated. The experimental results show that the sensitivity of FBG/epoxy diaphragm pressure sensor is decreasing with the increase of the diaphragm thickness. The sensitivities of the FBG pressure sensors with diaphragm thicknesses of 0.5 mm, 0.7 mm, and 1.0 mm were 175.5 pm/kPa, 89.5 pm/kPa, and 43.7 pm/kPa, respectively. The pressure measured by the proposed FBG sensor was compared with theoretical prediction and a close agreement was observed.

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Section: Introductionmentioning

confidence: 99%

Fiber Bragg Grating Pressure Sensor Integrated with Epoxy Diaphragm

Her

Weng

2021

Sensors

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“…Common optical hydrophones include Bragg-gratings [14], fiber-lasers [15], Mach-Zender interferometers [16], and Sagnac interferometers [17]. However, the highest resolution optical hydrophones use externallymounted Fabry-Pérot interferometric cavities [1], [2], [4], [6], [9], [10], [18] Intracellular electrical measurements are used in studying cell electrophysiology for a variety of applications [19]- [21]. The patch-clamp technique is the most common and requires inserting a micro-pipette into the cell membrane [19], [22], [23].…”

Section: Introductionmentioning

confidence: 99%

“…Hz. This is more sensitive than alternative pressure sensor designs [6] and is sufficient to measure cardiomyocyte acoustics [12]. We demonstrate measurements of cardiomyocyte acoustic signals from cellularsized sources.…”

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confidence: 99%

Optical Fiber Photonic Crystal Hydrophone for Cellular Acoustic Sensing

2021

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This paper describes the design, characterization, and testing of a compact hydrophone capable of measuring acoustic signals from cardiomyocytes. Our hydrophone consists of a nanofabricated photonic-crystal diaphragm externally-mounted to the facet of an optical fiber to form a pressure-sensitive Fabry-Pérot cavity. Our hydrophone can operate in small liquid volumes less than 5 mm deep and incorporates a microchannel to vent air during immersion. The venting channel is designed to optimize bandwidth and sensitivity. Modeling and experimental results in water show a bandwidth from 50 Hz to 18 kHz and a minimum detectable pressure of 3 µP a/ √Hz. We demonstrate the sensitivity to simulated bio-acoustic sources with nanometer-scale displacements.

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“…Another advantage is that it has a high light transmission speed, resistant to corrosion, and relatively affordable [4]. Because of these advantages, optical fiber has been developed as a sensor system, such as temperature sensors [5,6], UV radiation sensors [7], pressure sensors [8,9], water turbidity sensors [10], etc.…”

Section: Introductionmentioning

confidence: 99%

Detection of Mercury Ions in Water using a Plastic Optical Fiber Sensor

Hardiantho

Arminah²,

Arifin³

2021

IPR

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Research has been carried out on the detection of mercury ions in water using plastic optical fibers. Detection of mercury ions is done by immersing the optical fiber sensor in the HgCl2 solution, where both ends of the sensor are connected to an LED and a phototransistor. LED as a light source will emit light along with the optical fiber which will be received by the phototransistor. The optical light received by the phototransistor is converted into an electric voltage and given a gain in the differential amplifier. The output voltage in the form of an analog signal is converted into a digital signal on the Arduino UNO so that it can be read on a computer. The optical fiber as a sensor is made in two configurations, namely U configuration and spiral spring configuration. The jacket and the fiber optic cladding are peeled off and then covered with chitosan. Each configuration will be given a variation of the curve to analyze the characteristics of the sensor. The curvature can cause a large power loss resulting in attenuation of the light intensity of the LED received by the phototransistor. Apart from the effect of indentation on optical fibers, the output voltage measurement results are also influenced by the level of HgCl2 concentration. The best measurement results for mercury ion sensors in water using plastic optical fibers are obtained in a spiral spring configuration with a chitosan cladding with a variation of 6 coils which has a sensitivity of 104.065 mV/ppm.

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Review of high sensitivity fibre-optic pressure sensors for low pressure sensing

Cited by 119 publications

References 190 publications

Fiber Bragg Grating Pressure Sensor Integrated with Epoxy Diaphragm

Fiber Bragg Grating Pressure Sensor Integrated with Epoxy Diaphragm

Optical Fiber Photonic Crystal Hydrophone for Cellular Acoustic Sensing

Detection of Mercury Ions in Water using a Plastic Optical Fiber Sensor

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