A CNT-coated refractive index sensor based on Michelson interferometer with thin-core fiber

Wang, Bowen; Ni, Kai; Wang, Piaopiao; Ma, Qingsong; Wu, Tian; Tan, Lili

doi:10.1016/j.yofte.2018.11.018

Cited by 21 publications

(11 citation statements)

References 17 publications

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“…In order to achieve biosensing, the tip of sensor can be coated with the sensitive film. Wang et al [177] proposed an RI sensor based on an MI with a TCF coated by carbon nanotube. This sensor was fabricated by the splice of a sectioned SMF on one end of TCF, and the other end was turned into a circular arc by fusion discharge.…”

Section: Mis Fabricated With Splicingmentioning

confidence: 99%

Fiber-Optic Microstructure Sensors: A Review

Ran

Rao

et al. 2021

Photonic Sens

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This paper reviews a wide variety of fiber-optic microstructure (FOM) sensors, such as fiber Bragg grating (FBG) sensors, long-period fiber grating (LPFG) sensors, Fabry-Perot interferometer (FPI) sensors, Mach-Zehnder interferometer (MZI) sensors, Michelson interferometer (MI) sensors, and Sagnac interferometer (SI) sensors. Each FOM sensor has been introduced in the terms of structure types, fabrication methods, and their sensing applications. In addition, the sensing characteristics of different structures under the same type of FOM sensor are compared, and the sensing characteristics of the all FOM sensors, including advantages, disadvantages, and main sensing parameters, are summarized. We also discuss the future development of FOM sensors.

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Section: Mis Fabricated With Splicingmentioning

confidence: 99%

Fiber-Optic Microstructure Sensors: A Review

Ran

Rao

et al. 2021

Photonic Sens

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“…Except for simplifying the detection operation, label-free methods benefit for the real-time interaction kinetic measurement of biomolecules [ 6 ]. To date, label-free optical biosensor based on refractive index (RI) is the most widely studied, applied, and successful method [ [7] , [8] , [9] , [10] , [11] ]. For example, surface plasmon resonance (SPR) biosensors are typically RI-response label-free and commercially available instruments (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, highly effective RI sensors can be designed using the Fresnel reflection principle [ [9] , [10] , [11] ]. In these systems, the reflectivity of the liquid-sensor interface is approximated by combining Fresnel reflection equations with Snell's law.…”

Section: Introductionmentioning

confidence: 99%

Development of a novel label-free all-fiber optofluidic biosensor based on Fresnel reflection and its applications

Zhuo

Song

et al. 2021

Analytica Chimica Acta

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A novel, compact, cost-effective, and robust label-free all-fiber optofluidic biosensor (LF-AOB) based on Fresnel reflection mechanism was built through integrating single-multi mode fiber coupler and highly sensitive micro-photodetector. The Fresnel reflection light intensity detected by the LF-AOB greatly depended on the RI change on the end-surface of the fiber probe according to experimental and simulation results. The capability of the LF-AOB for real-time in situ detection in optofluidic system were verified by measuring salt and protein solution, and the lowest limit of detection was 1.0 × 10 −6 RIU. Our proposed theory can effectively eliminate the influence of light intensity fluctuation, and one-point calibration method of sensor performance is conducive for rapid and convenient detection of targets. Label-free sensitive detection of SARS-Cov-2 Spike protein receptor-binding domain (S-RBD) and the binding kinetics assay between S-RBD and anti-S-RBD antibody were achieved using the LF-AOB. These contributed to the elegant design of all-fiber optical system with high efficiency, high resolution and sensitivity of micro-photodetector, and enhanced interaction between the light and the samples at the liquid-sensor interface because of the large surface area of the multi-mode fiber probe. The LF-AOB can be extended as a universal sensing platform to measure other factors associated with refractive index because its high sensitivity, low sample consumption (∼160 nL), and capability of real-time in situ detection.

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“…Functionalizing of a reflective SSCS fiber structure has also been widely studied. A phenylboronic -acid-derivatized poly acrylic acid (PAA-PBA)/ polyvinyl alcohol (PVA) functionalized reflective SSCS fiber tip was reported for glucose detection for physiological (human body) pH levels [101] and a methylcellulose film-coated reflective SSCS for humidity measurement with a maximum sensitivity of 0.133 nm/RH [102]; Wang et al proposed to deposit a thin carbon nanotube layer, which has better compatibility, on the surface of a reflective SSCS for RI sensing [103]; Finally carbon-nanotube (CNT)/polyvinyl alcohol (PVA) was coated on a reflective SSCS for relative humidity sensing by Ma et al [104].…”

Section: B Sscs Fiber Structuresmentioning

confidence: 99%

Singlemode-Multimode-Singlemode Fiber Structures for Sensing Applications—A Review

Liu

et al. 2021

IEEE Sensors J.

119

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A singlemode-multimode-singlemode (SMS) fiber structure consists of a short section of multimode fiber fusionspliced between two SMS fibers. The mechanism underpinning the operation of an SMS fiber structure is multimode interference and associated self-imaging. SMS structures can be used in a variety of optical fiber systems but are most commonly used as sensors for a variety of parameters, ranging from macro-world measurands such as temperature, strain, vibration, flow rate, RI and humidity to the micro-world with measurands such as proteins, pathogens, DNA, and specific molecules. While traditional SMS structures employ a short section of standard multimode fiber, a large number of structures have been investigated and demonstrated over the last decade involving the replacement of the multimode fiber section with alternatives such as a hollow core fiber or a tapered fiber. The objective of replacing the multimode fiber has most often been to allow sensing of different measurands or to improve sensitivity. In this paper, several different categories of SMS fiber structures, including traditional SMS, modified SMS and tapered SMS fiber structures are discussed with some theoretical underpinning and reviews of a wide variety of sensing examples and recent advances. The paper then summarizes and compares the performances of a variety of sensors which have been published under a number of headings. The paper concludes by considering the challenges faced by SMS based sensing schemes in terms of their deployment in real world applications and discusses possible future developments of SMS fiber sensors.

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A CNT-coated refractive index sensor based on Michelson interferometer with thin-core fiber

Cited by 21 publications

References 17 publications

Fiber-Optic Microstructure Sensors: A Review

Fiber-Optic Microstructure Sensors: A Review

Development of a novel label-free all-fiber optofluidic biosensor based on Fresnel reflection and its applications

Singlemode-Multimode-Singlemode Fiber Structures for Sensing Applications—A Review

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