A Miniature Fabry Perot Sensor for Twist/Rotation, Strain and Temperature Measurements Based on a Four-Core Fiber

Budinski, Vedran; Đonlagić, Denis

doi:10.3390/s19071574

Cited by 12 publications

(5 citation statements)

References 45 publications

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“…In multi-core optical fiber point sensing, each channel can be used to measure a specific physical parameter at a particular position. By introducing different sensing mechanisms into different channels of the optical fiber, it can be employed to construct Fabry-Perot [48][49][50][51][52][53][54][55], Michelson [56][57][58][59][60], and Mach-Zehnder [61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76] interferometers, allowing independent measurements of physical parameters at specific locations. This enables real-time monitoring and perception of changes in physical parameters such as refractive index [56,57], temperature [48,[69][70][71][72][73], bending [51,61,62,77], and strain [50,[63][64][65].…”

Section: Application Of Multi-core Optical Fibers In Sensing Networkmentioning

confidence: 99%

Applications and Development of Multi-Core Optical Fibers

Chen,

Yuan,

Zhang

et al. 2024

Photonics

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The rapid development of information and communication technology has driven the demand for higher data transmission rates. Multi-core optical fiber, with its ability to transmit multiple signals simultaneously, has emerged as a promising solution to meet this demand. Additionally, due to its characteristics such as multi-channel transmission, high integration, spatial flexibility, and versatility, multi-core optical fibers hold vast potential in sensing applications. However, the manufacturing technology of multi-core fiber is still in its early stages, facing challenges such as the design and fabrication of high-quality cores, efficient coupling between cores, and the reduction of crosstalk. In this paper, an overview of the current status and future prospects of multi-core fiber manufacturing technology has been presented, and their limitations will be discussed. Some potential solutions to overcome these challenges will be proposed. Their potential applications in optical fiber sensing will also be summarized.

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Section: Application Of Multi-core Optical Fibers In Sensing Networkmentioning

confidence: 99%

Applications and Development of Multi-Core Optical Fibers

Chen,

Yuan,

Zhang

et al. 2024

Photonics

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“…Coincidentally, ∆φ is related to the displacement length from the fiber cave-end to the sensing target (∆d), along with the number of fringes (N f ). These could be mathematically described as [8][9], [15]:…”

Section: Principles Of Ffpi Sensormentioning

confidence: 99%

A High Sensitivity of Vital Signs Detector using Fiber Optic-based Fabry-Perot Interferometer

Pullteap

Samartkit

2020

ECTI-EEC

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In this paper, a development of high sensitivity for vital sign detector based on the fiber optic-based Fabry-Perot interferometer (FFPI) has been proposed. Two interested parameters; heart rate (HR), and also blood pressure (BP) are measured as the vital sign parameters for investigating the performance of the FFPI. Particularly, the proposed sensor is exploited to detect human arterial pulse for indicating the number of interference signals (fringes). A fringe counting technique is, consequently, applied in associate with the deflection of material technique to demodulate the observed number of fringes into HR and BP. Additionally, the reflective thin film with reflectance of approximately 55% is utilized for attaching to the human wrist during the measurement. Furthermore, a digital sphygmomanometer model OMRON HEM-7130 is employed as a reference sensor. After 20 times of repeatability on the same human subject, the FFPI could indicate the systolic and diastolic BP, as well as HR, with average error of 0.94%, 1.64%, and 1.01%, respectively. Moreover, the FFPI could determine the mentioned parameters in decimal numbers, as opposed to the reference sensor. This could, thus, verified that the FFPI is a very sensitive and more precise instrument for applying to the vital sign measurement.

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“…After being traditionally used in astronomy since the 1970s [ 1 ], it has been widely used in LIDAR instruments for environmental monitoring [ 2 ], laser technology [ 3 ], atmospheric optics [ 4 , 5 ], marine optics [ 6 ], gas analysis [ 7 ], length measurement, and angle metrology [ 8 ]. The F-P interferometric technology not only includes the F-P etalon but also other structures with F-P interference form such as the optical fibre F-P interferometer [ 9 , 10 ], MEMS F-P interferometer [ 11 , 12 ], and complex mixed F-P interferometric measurement [ 13 , 14 ] of multiple quantities of temperature, displacement, structural loads, electro-optic coefficients, twist/rotation, strain, and pressure [ 15 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Microdisplacement Measurement Based on F-P Etalon: Processing Method and Experiments

Shen

Zhou

2021

Sensors

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Herein, a processing method is proposed for accurate microdisplacement measurements from a 2D Fabry–Perot (F-P) fringe pattern. The core of the processing algorithm uses the F-P interference imaging concentric ring pattern to accurately calculate the centre coordinates of the concentric ring. The influencing factors of measurement were analysed, and the basic idea of data processing was provided. In particular, the coordinate rotation by the 45-degree method (CR) was improved; consequently, the virtual pixel interval was reduced by half, and the calculation accuracy of the circle centre coordinate was improved. Experiments were conducted to analyse the influence of the subdivision and circle fitting methods. The results show that the proposed secondary coordinate rotation (SCR) by 45 degrees method can obtain higher accuracy of the centre coordinate than the CR method, and that the multichord averaging method (MCAM) is more suitable for calculation of the centre coordinate than the circular regression method (CRM). Displacement measurement experiments were performed. The results show that the standard experimental deviation of the centre of the circle is approximately 0.009 µm, and the extended uncertainty of the displacement measurement in the range of 5 mm is approximately 0.03 μm. The data processing method studied in this study can be widely used in the field of F-P interferometry.

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A Miniature Fabry Perot Sensor for Twist/Rotation, Strain and Temperature Measurements Based on a Four-Core Fiber

Cited by 12 publications

References 45 publications

Applications and Development of Multi-Core Optical Fibers

Applications and Development of Multi-Core Optical Fibers

A High Sensitivity of Vital Signs Detector using Fiber Optic-based Fabry-Perot Interferometer

Microdisplacement Measurement Based on F-P Etalon: Processing Method and Experiments

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