Low coherence technique to interrogate optical sensors based on selectively filled double-core photonic crystal fiber for temperature measurement

Li, Kun; Meng, Jian; Zhao, Zhenyu; Wang, Zeming

doi:10.1016/j.optcom.2016.12.037

Cited by 7 publications

(5 citation statements)

References 19 publications

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“…COF-based temperature sensors usually have complex manufacturing, high cost, and poor robustness. Recently, all-fiber interferometry sensors with lower sensing cross-sensitivity have been proposed to address these problems and have achieved temperature and even multiparameter simultaneous measurement. − Some researchers proposed interferometry sensors fabricated with halved FBGs, hollow-core fibers (HCFs) and PCFs, microfibers, and microsilica cavities, which have the potential to achieve extra-high sensitivity, up to 307.6 pm/°C, and realize multiple-parameter discriminative sensing.…”

Section: Body Temperature and Thermal Comfortmentioning

confidence: 99%

Wearable Optical Sensing in the Medical Internet of Things (MIoT) for Pervasive Medicine: Opportunities and Challenges

et al. 2022

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Recent advances in the Medical Internet of Things (MIoT) and big data enable a prospering platform for pervasive healthcare and facilitate the transformation from hospital-centered to human-centered healthcare. Wearable devices as human interfaces provide first-hand data and real-time monitoring, which are key technologies in the MIoT. Several remarkable surveys have been conducted to summarize the recent progress in wearable sensors and systems for the MIoT and pervasive medicine. However, few have focused on wearable optical sensing (WOS) technologies, which is an emerging sensing modality in wearable devices. WOS can achieve high precision, high compatibility, high anti-interference, and low motion artifacts for human vital signal acquisition, which are particularly useful in special scenarios such as intensive care units (ICUs). These technologies can also be integrated with smart fabrics or mobile computing for out-of-hospital healthcare. This work provides the first literature review of WOS for pervasive medicine. We aim to systematically summarize the emerging WOS technologies in the MIoT for disease diagnosis and health monitoring. Specifically, this review covers the technical bases and design principles of major WOS technologies and their application domains for monitoring and treatment. We also discuss the opportunities and challenges, especially in the COVID-19 outbreak.

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Section: Body Temperature and Thermal Comfortmentioning

confidence: 99%

Wearable Optical Sensing in the Medical Internet of Things (MIoT) for Pervasive Medicine: Opportunities and Challenges

et al. 2022

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“…A steady, low-cost and flexible temperature sensor with MZ interfering type was proposed, which was made by selectively filling the cladding of the DC-PCF with distilled water. The corresponding experimental measurement system of a typical temperature sensor is presented in figure 23(a) [146]. The unique temperature-dependent characteristics of the selectively NLC-filled PCF were analyzed from 45 • C to 110 • C, and the NLC was selectively infiltrated into the cladding holes of the PCFs experimentally using the fs laser drilling technique.…”

Section: Ri Sensorsmentioning

confidence: 99%

Overview of photonic devices based on functional material-integrated photonic crystal fibers

Wang¹,

Li²,

Cheng³

et al. 2022

J. Phys. D: Appl. Phys.

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Photonic crystal fibers (PCFs) have brought tremendous advancements due to their predominant features of peculiar air-holes arrangement in two-dimentional direction. Functional materials like metals, magnetic fluids, nematic liquid crystals, graphene and so on, are extensively adopted to integrate with PCFs to get extraordinary transmission properties. This review takes the development stages of photonic devices based on functional materials-infiltrated PCFs into consideration, covering the overview of common materials and their photoelectric characteristics, the state-of-art infiltrating/coating techniques, as well as the corresponding applications involving polarization filtering and splittering devices in optical communication and sensing elements related to multiple parameters measurement. The cladding air hole of PCFs provides a natural optofluidic channel for materials being introduced, light-matter interaction being enhanced, and transmission properties being extended, where a lab on a fiber are able to be proceeded. It paves a space for the development of photonic devices in the aspects of compact, multi-functional integration, and electromagnetic resistance as well. According to surface plasmon resonance, the property of tunable refractive indices, and the flexible geometry structures, it comes up to some representative researches on polarization filters, multiplexer-demultiplexers, splitters, couplers and sensors, making a candidate for widespread fields of telecommunication, signal-capacity, and high-performance sensing.

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“…However, permission to use this material for any other purposes must be obtained from the IEEE by sending a request to pubs-permissions@ieee.org. adhesive [17]. The length of the PCF was ∼4 cm, about 8 mm of the PCF was filled with LC, overlong LC would cause more transmission loss.…”

Section: Principle and Experiments Setupmentioning

confidence: 99%

“…The guiding mechanisms usually change from total internal reflection (TIR) to photonic bandgap (PBG) effect if all air holes are infiltrated with materials whose refractive indices are higher than background. However, if only a few specific holes are infiltrated with higher index materials, the guiding mechanism does not change to PBG directly but brings diverse properties [14][15][16][17][18][19][20], such as multiwaveguide coupling [14] or high birefringence induced by asymmetry infiltration [15]. Selectively infiltrated PCFs confining light by both index-guiding and bandgap-guiding was introduced in [16].…”

Section: Introductionmentioning

confidence: 99%

Electrically Tuning Characteristics of LC Selectively Infiltrated PCF Sagnac Interferometer

Xue

Liu

et al. 2021

IEEE Photon. Technol. Lett.

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A photonic crystal fiber was selectively infiltrated only two of the air holes near the core with liquid crystal. The selective infiltration caused geometric asymmetry and created high birefringence. Because of the geometric asymmetry, the response to varying electric field is concerned with electric field direction. A Sagnac interferometer was set to investigate the electric tuning characteristics of the selectively infiltrated photonic crystal fiber. The effective refractive-indices of the fiber varies with electric field due to reorientation of liquid crystal molecules. The highest sensitivity was 1.12 nm/V (504 nm/kV/mm) with tuning range of 7 nm when electric field direction was parallel to the connecting line of infiltrated holes. The response time of the selectively infiltrated photonic crystal fiber was studied. The device can be utilized as voltage sensors, electro-optical modulators and filters.

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Low coherence technique to interrogate optical sensors based on selectively filled double-core photonic crystal fiber for temperature measurement

Cited by 7 publications

References 19 publications

Wearable Optical Sensing in the Medical Internet of Things (MIoT) for Pervasive Medicine: Opportunities and Challenges

Wearable Optical Sensing in the Medical Internet of Things (MIoT) for Pervasive Medicine: Opportunities and Challenges

Overview of photonic devices based on functional material-integrated photonic crystal fibers

Electrically Tuning Characteristics of LC Selectively Infiltrated PCF Sagnac Interferometer

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