Singlemode-Multimode-Singlemode Optical Fiber Sensor for Accurate Blood Pressure Monitoring

Pang, Yi-Neng; Liu, Bin; Liu, Juan; Wan, Shengpeng; Wu, Tao; Yuan, Jinhui; Xin, Xiangjun; He, Xing Dao; Wu, Qiang

doi:10.1109/jlt.2022.3155194

Cited by 25 publications

(5 citation statements)

References 39 publications

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“…Indeed, these measurands produce event-like (pulsed) signals that can be easily detected by FFSs with simple signal processing. Recently, the topic has been extended to other applications such as pulse wave velocity monitoring [123], blood pressure monitoring [124], and blood glucose sensing [92].…”

Section: Group A-physical Group B-mentioning

confidence: 99%

Advances in Optical Fiber Speckle Sensing: A Comprehensive Review

Chapalo,

Stylianou,

Mégret

et al. 2024

Photonics

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Optical fiber sensors have been studied, developed, and already used in the industry for more than 50 years due to their multiplexing capabilities, lightweight design, compact form factors, and electromagnetic field immunity. The scientific community continuously studies new materials, schemes, and architectures aiming to improve existing technologies. Navigating through diverse sensor technologies, including interferometry, intensity variation, nonlinear effects, and grating-based sensors, fiber specklegram sensors (FSSs) emerge as promising alternatives due to their simplicity and low cost. This review paper, emphasizing the potential of FSSs, contributes insights to the present state and future prospects for FSSs, providing a holistic view of advancements propelling FSSs to new frontiers of innovation. Subsequent sections explore recent research, technological trends, and emerging applications, contributing to a deeper understanding of the intricacies shaping the future of FFS sensor technologies.

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Section: Group A-physical Group B-mentioning

confidence: 99%

Advances in Optical Fiber Speckle Sensing: A Comprehensive Review

Chapalo,

Stylianou,

Mégret

et al. 2024

Photonics

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“…Notably, significant progress has been made in recent years with the development of various fiber optic pressure sensors. These sensors employ different principles, such as Fiber Bragg Gratings (FBGs) [25,26], Surface Plasmon Resonance (SPR) [27,28], Multimode Interference (MMI) [29,30], and Mach-Zehnder interferometer (MZI) [31,32]. This section primarily focuses on recent advancements in fiber optic FP pressure sensors utilizing thin film technology.…”

Section: Pressure Sensormentioning

confidence: 99%

A Review of Optical Fiber Sensing Technology Based on Thin Film and Fabry–Perot Cavity

Ma,

Peng,

Bai

et al. 2023

Coatings

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Fiber sensors possess characteristics such as compact structure, simplicity, electromagnetic interference resistance, and reusability, making them widely applicable in various practical engineering applications. Traditional fiber sensors based on different microstructures solely rely on the thermal expansion effect of silica material itself, limiting their usage primarily to temperature or pressure sensing. By employing thin film technology to form Fabry–Perot (FP) cavities on the end-face or inside the fiber, sensitivity to different physical quantities can be achieved using different materials, and this greatly expands the application range of fiber sensing. This paper provides a systematic introduction to the principle of FP cavity fiber optic sensors based on thin film technology and reviews the applications and development trends of this sensor in various measurement fields. Currently, there is a growing need for precise measurements in both scientific research and industrial production. This has led to an increase in the variety of structures and sensing materials used in fiber sensors. The thin film discussed in this paper, suitable for various types of sensing, not only applies to fiber optic FP cavity sensors but also contributes to the research and advancement of other types of fiber sensors.

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“…PDMS exhibits high structural flexibility owing to its low Young's modulus, which can solve the fragility defect of optical-fiber sensors. For example, an optical-fiber blood-pressure monitoring sensor based on a single-mode-multimode-single-mode structure encapsulated with PDMS to protect the fiber was proposed by Pang et al [27]. In addition, PDMS demonstrates good biocompatibility and chemical inertness; thus, it is often applied as a microfluidic channel [28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh Sensitivity Temperature Sensor Based on Harmonic Vernier Effect

Chen

Tian

et al. 2023

IEEE Sensors J.

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A high-sensitivity and miniature open cavity Fabry-Perot interferometer (OCFPI) encapsulated with the polydimethylsiloxane (PDMS) film based on high-order harmonic Vernier effect is designed and experimentally investigated. To the best of our knowledge, PDMS is applied for the first time to fill the open cavity of Fabry-Perot interferometer to obtain high-temperature sensitivity. The resonant dip (peak) wavelength of the designed temperature sensor monotonically moves toward the shortwave direction as the temperature increases from 40°C to 60°C due to the effects of expansion and thermo-optic property of PDMS. The proposed OCFPI encapsulated with PDMS film provides the following excellent performance advantages. (1) Compared with traditional all-fiber air-cavity OCFPIs with temperature sensitivity of approximately 10 pm/°C, the proposed OCFPI sensor has a much higher temperature sensitivity of −3.4 nm/°C at the temperature range of 40°C-60°C with a magnification factor (M-factor) of approximately 11 when order of harmonic Vernier effect i = 4. (2) The proposed OCFPI exhibits good reversibility during the heating and cooling processes, and the measured M-factor matches well with the theoretically calculated M-factor. (3) The proposed OCFPI shows excellent stability with maximum wavelength deviation of 0.567 nm (internal envelope based on a fourth-order harmonic Vernier effect) and 0.042 nm (upper envelope) within 450 min. (4) The proposed OCFPI is inexpensive, robust, easy to fabricate, and compact, which can be used in harsh environments. Therefore, it provides excellent potential in dynamic temperature measurement.

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Singlemode-Multimode-Singlemode Optical Fiber Sensor for Accurate Blood Pressure Monitoring

Cited by 25 publications

References 39 publications

Advances in Optical Fiber Speckle Sensing: A Comprehensive Review

Advances in Optical Fiber Speckle Sensing: A Comprehensive Review

A Review of Optical Fiber Sensing Technology Based on Thin Film and Fabry–Perot Cavity

Ultrahigh Sensitivity Temperature Sensor Based on Harmonic Vernier Effect

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