Sensing of airborne molecular contaminants based on microfiber coupler with mesoporous silica coating

Zhou, Guorui; Niu, Longfei; Jiang, Yilan; Líu, Hao; Xie, Xiufang; Yan, Hongwei; Yan, Lianghong; Liu, Jun; Chen, Jiaxuan; Miao, Xinxiang; Zhang, Hai; Jiang, Xiaodong; Lv, Haibing

doi:10.1016/j.sna.2018.12.046

Cited by 9 publications

(10 citation statements)

References 27 publications

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“…The resulting tapered SMF coupler has been used for sensing applications, including temperature [226][227], RI [228][229][230], strain [231], liquid flow rate [232] and magnetic field sensing [233][234][235][236][237] etc. The functionalization of tapered SMF couplers enables the sensors to be used to detect bio-chemical materials, such as humidity [238][239], ammonia [240], ethanol [241], human cardiac troponin, in which the Vernier effect was utilized to improve sensor sensitivity [242], airborne contaminants [243], myocardial infarction I [244].…”

Section: B Tapered Sms Fiber Couplermentioning

confidence: 99%

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

Liu

et al. 2021

IEEE Sensors J.

118

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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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Section: B Tapered Sms Fiber Couplermentioning

confidence: 99%

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

Liu

et al. 2021

IEEE Sensors J.

118

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“…Selectivity is an essential evaluation factor for a chemical sensor and shows the possibility of crosstalk with other foreign substances. Zhou’s group propose an MFC sensor with a mesoporous silica coating to realize the the detection of airborne molecular contaminants (AMCs) [ 74 ]. With the help of mesoporous silica, the absorption ability to AMCs has been enhanced.…”

Section: Sensing Applicationsmentioning

confidence: 99%

“… ( a ) The fabrication setup of MFCs; ( b ) the fabricated MFC sensing unit; ( c ) the mesoporous silica coating on the surface of the MFC; ( d ) transmission spectral responses of the MFC before and after it is coated with mesoporous silica layer; ( e ) the cross-section of the fabricated MFC sensing unit. Copyright (2019) from Reference [ 74 ]. …”

Section: Figurementioning

confidence: 99%

State-of-the-Art Optical Microfiber Coupler Sensors for Physical and Biochemical Sensing Applications

et al. 2020

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An optical fiber coupler is a simple and fundamental component for fiber optic technologies that works by reducing the fiber diameter to hundred nanometers or several micrometers. The microfiber coupler (MFC) has regained interest in optical fiber sensing in recent years. The subwavelength diameter rationales vast refractive index (RI) contrast between microfiber “core” and surrounding “cladding”, a large portion of energy transmits in the form of an evanescent wave over the fiber surface that determines the MFC ultrasensitive to local environmental changes. Consequently, MFC has the potential to develop as a sensor. With the merits of easy fabrication, low cost and compact size, numerous researches have been carried out on different microfiber coupler configurations for various sensing applications, such as refractive index (RI), temperature, humidity, magnetic field, gas, biomolecule, and so on. In this manuscript, the fabrication and operation principle of an MFC are elaborated and recent advances of MFC-based sensors for scientific and technological applications are comprehensively reviewed.

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“…Furthermore, the sensors provided supporting measures of optics components operation, which is suitable for potential application in biological and chemical detection. Compared with our previous work [33], this work has made progress on novel structure and theoretical analysis, as well as the measurement method and technical feasibility verification. Firstly, taking the advantage of energy transfer in the coupling region, we reused the region as the effective sensing region; the device with the Sagnac OMFs loop possesses a more compact structure than a system containing an OMFs coupler.…”

Section: Introductionmentioning

confidence: 98%

A Novel Airborne Molecular Contaminants Sensor Based on Sagnac Microfiber Structure

Zhou

Xiang

You

et al. 2022

Sensors

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The impact of airborne molecular contaminants (AMCs) on the lifetime of fused silica UV optics in high power lasers (HPLs) is a critical issue. In this work, we demonstrated the on-line monitoring method of AMCs concentration based on the Sagnac microfiber structure. In the experiment, a Sagnac microfiber loop with mesoporous silica coating was fabricated by the microheater brushing technique and dip coating. The physical absorption of AMCs in the mesoporous coating results in modification of the surrounding refractive index (RI). By monitoring the spectral shift in the wavelength domain, the proposed structure can operate as an AMCs concentration sensor. The sensitivity of the AMCs sensor can achieve 0.11 nm (mg/m3). By evaluating the gas discharge characteristic of four different low volatilization greases in a coarse vacuum environment, we demonstrated the feasibility of the proposed sensors. The use of these sensors was shown to be very promising for meeting the requirements of detecting trace amounts of contaminants.

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Sensing of airborne molecular contaminants based on microfiber coupler with mesoporous silica coating

Cited by 9 publications

References 27 publications

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

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

State-of-the-Art Optical Microfiber Coupler Sensors for Physical and Biochemical Sensing Applications

A Novel Airborne Molecular Contaminants Sensor Based on Sagnac Microfiber Structure

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