Sensitive and Wearable Optical Microfiber Sensor for Human Health Monitoring
Abstract
Abstract Silica‐fiber‐based sensors have the advantage of being small, electrically isolated, immune to electromagnetic fields, and easily incorporated into networks. However, only few of them were used for monitoring physiological signals directly, due to their limited sensitivity, comfort, and safety. In this work, a simple architecture for sensitive and wearable photonic sensors, which are capable of strain and pressure detection for healthcare applications is reported. The proposed sensor consists of a hybrid plasmonic microfiber knot resonator embedded in a polydimethylsiloxane membrane. The mechanical sensitivity is more than one order of magnitude larger than exhibited by traditional electronic devices or other fiber devices, including Bragg gratings. In addition, the sensing of wrist pulse, respiration, and finger pulse are also experimentally demonstrated. This novel photonic‐based platform may provide a new basis for designing sensitive and wearable sensors for personalized diagnostics and physiological monitoring applications. With their potential to be embedded into networks of smart clothing and remote health monitoring of patients, these sensors possessing great biocompatibility will have a distinguished advantage in military, aerospace, and medical applications, particularly in high‐magnetic‐field environments, e.g., magnetic resonance imaging.
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A hybrid plasmonic microfiber knot resonator embedded in a PDMS membrane has high sensitivity for sensing wrist/finger pulse and respiration.
“In addition, experiments with a novel photonic-based platform—a hybrid plasmonic microfiber knot resonator embedded in a PDMS membrane—were performed and high sensitivity was confirmed when sensing wrist/finger pulse and respiration [216].”
From The Current State of Optical Sensors in Medical Wearables (2022) · cites this paper as [216]
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Recent advancements of plasmonic sensor technologies in healthcare and electronics
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Flexible wearable optical microfiber sensor for identifying bending direction and body temperature
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Highly sensitive skin-like wearable optical sensor for human physiological signals monitoring
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A High-Temperature Accelerometer with Excellent Performance Based on the Improved Graphene Aerogel
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Soft Optoelectronic Sensors with Deep Learning for Gesture Recognition
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A capillary-aided microfiber Bragg grating pH sensor for hydrovoltaic technology
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Optical Microfiber Biomedical Sensors: Classification, Applications, and Future Perspectives
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“For example, Li et al. [13] reported a packaged hybrid plasmonic microfiber knot resonator for human health monitoring.”
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“At the same time, they can also offer tailored healthcare services to diverse populations without the drawbacks associated with other wearable solutions, such as lack of breathability and reliance on adhesives [39, 40].”
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“They also developed a smart insole for gait monitoring by using intensity-based POF curvature sensors with enhanced sensitivity which was done by laterally sectioning the fibers through a polishing process.(55) Their third study summarized the application of POFs in the field of healthcare.”
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“Due to their smaller diameter, these sensors possess a relatively low equivalent elastic modulus, enhancing their sensitivity to pressure and enabling efficient detection of pulse waves with a high signal-to-noise ratio [19], [20], [21].”
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Ultrasensitive Micro-/Nano-Fiber-Enabled Flexible Sensor for Monitoring Human Temperature
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“…by human nerve fibers, stretching standard single-mode fibers to micro-/nano-fibers with a diameter of several micrometers can achieve strong evanescent fields, significantly improving the ability of light to interact with matter, allowing for higher flexibility and configurability [18], [19].”
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Whispering gallery mode based micro-ring resonator for magnetic field sensing
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Twisted Optical Micro/Nanofibers Enabled Detection of Subtle Temperature Variation
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High-Sensitivity Optic Fiber Pressure Sensor Based on Balloon-Like Single-Mode Fiber
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“For instance, tapered ultrafine fiber sensors can significantly increase the sensitivity of pressure sensors, but the difficulty in tapering and high susceptibility to breakage, as well as significant temperature effects, have limited their development [9], [27], [28].”
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“Various fiber-based interferometers play an important role in physical health monitoring techniques [4], marine monitoring [5] techniques, aquiculture [6], hazard forecasts [7], etc.”
BackgroundUltrasensitive and stable pressure sensor based on tapered optical fibres
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Coil-shaped multimode polymer optical fibers for robotic tactile perception
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“In order to address this obstacle, tactile sensing devices were constructed using optical micro/nanofibers that were fabricated from standard single-mode silica optical fibers [13–20].”
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“In contrast, the immunity to the aforementioned issues, coupled with the wide transmission bandwidth and multiplexing capabilities of optical signals, has increasingly brought fiber-optic sensors into focus within wearable sensing technologies [12], [13], [14], [15].”
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Cuffless Wearable Sphygmomanometers Using Dual Digital Optical Frequency Combs in Chalcogenide Chips
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Prognosis of Cardiovascular Conditions Noninvasively Using Printable Elastomeric Electronic Skin
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Force-sensitive optical fiber fabric based on hollow elastic tube and structural grating
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Cutting of optical fibers using a Bessel profile femtosecond laser
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- Authors
- Li, J., Chen, J., & Xu, F.
- Affiliations
- National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 P. R. China
- Collaborative Innovation Center of Advanced Microstructures (CN)
- Corresponding author
- Xu, Fei
- ORCID
- Xu, Fei
- Venue
- Advanced Materials Technologies
- Publisher
- Wiley
- Published
- 2018-10-03
- Volume
- 3
- Issue
- 12
- ISSN
- 2365-709X (ISSN-L)
- OpenAlex
- W2894770852
- Cited by
- 151
- References
- 35
- Citations by year
- 2026: 12 · 2025: 22 · 2024: 38 · 2023: 26 · 2022: 17 · 2021: 19 · 2020: 8 · 2019: 8 · 2018: 1
- FWCI
- 3.44
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Advanced Materials Technologies (publishedVersion)
- Funders
- National Natural Science Foundation of China (61535005, 61475069)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Fiber Optic Sensors
- Physical Sciences › Engineering › Biomedical Engineering › Non-Invasive Vital Sign Monitoring
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Photonic Crystal and Fiber Optics
- Keywords
- wearable sensors, polydimethylsiloxane membranes, strain sensing, pressure sensing, physiological monitoring, pulse detection, respiratory monitoring, smart clothing, remote patient monitoring, magnetic resonance imaging safety, biocompatibility
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