Optimal Design of an Hourglass in-Fiber Air Fabry-Perot Microcavity—Towards Spectral Characteristics and Strain Sensing Technology

Wang, Qi; Yan, Dongchao; Cui, Binbin; Guo, Zixuan

doi:10.3390/s17061282

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…Figure 5 represents the electric field strengths (V/m) in the three regions of the sensors A 1 A 2 , B 1 B 2 , and C 1 C 2 , respectively along the fiber, in the micro cavity and in the paraxial region of the microlens [28,29].…”

Section: Study By Comsol the Response Of The Designed Sensorsmentioning

confidence: 99%

Investigation by simulation of the highest sensitivity interferometric pressure sensor at the end of a micro-structured optical fiber

Bouchaour,

Guermat,

Adouane

et al. 2023

Phys. Scr.

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One of the most prevalent techniques used in the construction of optical fiber-based pressure sensors is Fabry-Perot interferometry. This work presents a variety of interferometric sensors based on this feature. To achieve this, we used chemical etching (HF) to create conical cavities at the ends of the optical fibers (SMF) and (GRIN), where the first gold (Au) deposition allows us to create half-mirrors. So the interface (core/Au) represents the first reflective surface. After filling each micro-cavity with a quantity of PDMS-type polymer to form a flexible micro-lens, and proceeding to a second deposition of gold (Au), we got the second reflective surface (PDMS/Au). The sensor with the highest sensitivity to pressure and temperature, namely 0.065nm/KPa and 0.24nm/°C, was obtained for a micro-cavity length of 35 µm, a diameter of 60 µm, and a micro-lens thickness of 20 µm, respectively. Analysis and simulation were performed using COMSOL Multiphysics to develop the sensor.

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Section: Study By Comsol the Response Of The Designed Sensorsmentioning

confidence: 99%

Investigation by simulation of the highest sensitivity interferometric pressure sensor at the end of a micro-structured optical fiber

Bouchaour,

Guermat,

Adouane

et al. 2023

Phys. Scr.

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show abstract

“…Recently, the miniature all-silica fiber optic FP sensors based on microcavity or microbubble have attracted much interest [8][9][10][11][12][13][14][15][16]. Ma et al [17] fabricated a compact FP pressure sensor based on a single-mode fiber (SMF) tip microcavity for high-pressure measurement.…”

Section: Introductionmentioning

confidence: 99%

Miniature All-Silica Microbubble-Based Fiber Optic Fabry-Perot Pressure Sensor with Pressure Leading-In Tube

Zhang

Liu

et al. 2019

Journal of Sensors

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A novel all-silica fiber optic Fabry-Perot (FP) pressure sensor with pressure leading-in tube based on microbubble structure is developed and experimentally demonstrated. The FP cavity is formed by fixing the end face of the single-mode fiber (SMF) parallel to the outer surface of the microbubble, in which the microbubble with a diameter of about 318 μm is constructed at the end of silica hollow tube. When external pressure is transmitted on the inner surface of the microbubble by the pressure leading-in tube, the FP cavity length changes with the diameter of microbubble. Experimental results show that such a sensor has a linear sensitivity of approximately 4.84 nm/MPa at room temperature over the pressure range of 1.1 MPa; the sensor has a very low temperature coefficient of approximately 2 pm/°C from room temperature to 600°C. The sensor has advantages of extremely low temperature coefficient, compact structure, and small size, which has potential applications for measuring pressure in high-temperature environment.

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High-sensitivity and fast-response fiber-optic micro-thermometer based on a plano-concave Fabry-Pérot cavity filled with PDMS

Kong

Zhang

et al. 2018

Sensors and Actuators A: Physical

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Optimal Design of an Hourglass in-Fiber Air Fabry-Perot Microcavity—Towards Spectral Characteristics and Strain Sensing Technology

Cited by 3 publications

References 31 publications

Investigation by simulation of the highest sensitivity interferometric pressure sensor at the end of a micro-structured optical fiber

Investigation by simulation of the highest sensitivity interferometric pressure sensor at the end of a micro-structured optical fiber

Miniature All-Silica Microbubble-Based Fiber Optic Fabry-Perot Pressure Sensor with Pressure Leading-In Tube

High-sensitivity and fast-response fiber-optic micro-thermometer based on a plano-concave Fabry-Pérot cavity filled with PDMS

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