Self-compensating fiber optic flow sensor system and its field applications

Peng, Wei; Pickrell, Gary; Huang, Zhengyu; Xu, Juntao; Kim, Dae Woong; Qi, Bing; Wang, Anbo

doi:10.1364/ao.43.001752

Cited by 17 publications

(12 citation statements)

References 17 publications

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“…One study has shown that white light interferometry-based methods are capable of measuring flow rate [83]. Here, the self-compensation fibre-optic sensor employed the principles of cantilever beam mechanics.…”

Section: Measurement Of Flow Parametersmentioning

confidence: 99%

Use of Fibre-Optic Sensors for Pipe Condition and Hydraulics Measurements: A Review

et al. 2022

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The combined length of the sewerage and clean water pipe infrastructure in the UK is estimated to be about 800,000 km. It is prone to failure due to its age and the inadequacies of the current pipe inspection methods. Fibre-optic cable sensing is an attractive way to continuously monitor this infrastructure to detect critical changes. This paper reviews the existing fibre-optic sensor (FOS) technologies to suggest that these technologies have better sensing potential than traditional inspection and performance monitoring methods. This review also discusses the requirements for retrofitting an existing pipeline with an FOS. It also demonstrates that there is a need for further research into methods applicable to non-pressurised pipelines, as there is very little existing literature that focuses on partially filled pipes and pipes with gravity fed flows.

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Section: Measurement Of Flow Parametersmentioning

confidence: 99%

Use of Fibre-Optic Sensors for Pipe Condition and Hydraulics Measurements: A Review

et al. 2022

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“…sensors have been widely used in temperature, pressure and chemical measurements [36][37][38][39][40][41][42][43][44]. This kind of sensors possess a series of characteristics such as compactness, lightweight, and generally immunity to electromagnetic interference ( EMI) [1].…”

Section: Application Of Fabry-perot Sensorsmentioning

confidence: 99%

Microgap Structured Optical Sensor for Fast Label-Free DNA Detection

Wang

Cooper

Wang

2008

J. Lightwave Technol.

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DNA detection technology has developed rapidly due to its extensive application in clinical diagnostics, bioengineering, environmental monitoring, and food science areas.Currently developed methods such as surface Plasmon resonance (SPR) methods, fluorescent dye labeled methods and electrochemical methods, usually have the problems of bulky size, high equipment cost and time-consuming algorithms, so limiting their application for in vivo detection. In this work, an intrinsic Fabry-Perot interferometric (IFPI) based DNA sensor is presented with the intrinsic advantages of small size, low cost and corrosion-tolerance. This sensor has experimentally demonstrated its high sensitivity and selectivity.In theory, DNA detection is realized by interrogating the sensor's optical cavity length variation resulting from hybridization event. First, a microgap structure based IFPI sensor is fabricated with simple etching and splicing technology. Subsequently, considering the sugar phosphate backbone of DNA, layer-by-layer electrostatic self-assembly technique is adopted to attach the single strand capture DNA to the sensor endface. When the target DNA strand binds to the single-stranded DNA successfully, the optical cavity length of sensor will be increased. Finally, by demodulating the sensor spectrum, DNA hybridization event can be judged qualitatively.This sensor can realize DNA detection without attached label, which save the experiment expense and time. Also the hybridization detection is finished within a few minutes.This quick response feature makes it more attractive in diagnose application. Since the iii sensitivity and specificity are the most widely used statistics to describe a diagnostic test, so these characteristics are used to evaluate this biosensor. Experimental results demonstrate that this sensor has a sensitivity of 6nmol/ml and can identify a 2 bp mismatch. Since this sensor is optical fiber based, it has robust structure and small size ( 125μm ). If extra etching process is applied to the sensor, the size can be further reduced. This promises the sensor potential application of in-cell detection. Further investigation can be focused on the nanofabrication of this DNA sensor, and this is very meaningful topic not only for diagnostic test but also in many other applications such as food industry, environment monitoring.iv Acknowledgement

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“…The Center for Photonics Technology at Virginia Tech has developed optical sensors for a wide range of analytes such as temperature [15], pressure [16,17], flow [18], acoustics [17,19], humidity, and various gases [20,21], including the world’s smallest high temperature pressure sensor [22]. The layer-by-layer electrostatic self-assembly (LbL/ESA) process allows direct attachment of these probes to the fiber surface, either the endface or side surfaces.…”

Section: Introductionmentioning

confidence: 99%

Photonic Biosensor Assays to Detect and Distinguish Subspecies of Francisella tularensis

Cooper

Bandara

Wang

et al. 2011

Sensors

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The application of photonic biosensor assays to diagnose the category-A select agent Francisella tularensis was investigated. Both interferometric and long period fiber grating sensing structures were successfully demonstrated; both these sensors are capable of detecting the optical changes induced by either immunological binding or DNA hybridization. Detection was made possible by the attachment of DNA probes or immunoglobulins (IgG) directly to the fiber surface via layer-by-layer electrostatic self-assembly. An optical fiber biosensor was tested using a standard transmission mode long period fiber grating of length 15 mm and period 260 μm, and coated with the IgG fraction of antiserum to F. tularensis. The IgG was deposited onto the optical fiber surface in a nanostructured film, and the resulting refractive index change was measured using spectroscopic ellipsometry. The presence of F. tularensis was detected from the decrease of peak wavelength caused by binding of specific antigen. Detection and differentiation of F. tularensis subspecies tularensis (type A strain TI0902) and subspecies holarctica (type B strain LVS) was further accomplished using a single-mode multi-cavity fiber Fabry-Perot interferometric sensor. These sensors were prepared by depositing seven polymer bilayers onto the fiber tip followed by attaching one of two DNA probes: (a) a 101-bp probe from the yhhW gene unique to type-A strains, or (b) a 117-bp probe of the lpnA gene, common to both type-A and type-B strains. The yhhW probe was reactive with the type-A, but not the type-B strain. Probe lpnA was reactive with both type-A and type-B strains. Nanogram quantities of the target DNA could be detected, highlighting the sensitivity of this method for DNA detection without the use of PCR. The DNA probe reacted with 100% homologous target DNA, but did not react with sequences containing 2-bp mismatches, indicating the high specificity of the assay. These assays will fill an important void that exists for rapid, culture-free, and field-compatible diagnosis of F. tularensis.

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Self-compensating fiber optic flow sensor system and its field applications

Cited by 17 publications

References 17 publications

Use of Fibre-Optic Sensors for Pipe Condition and Hydraulics Measurements: A Review

Use of Fibre-Optic Sensors for Pipe Condition and Hydraulics Measurements: A Review

Microgap Structured Optical Sensor for Fast Label-Free DNA Detection

Photonic Biosensor Assays to Detect and Distinguish Subspecies of Francisella tularensis

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