Fiber optic gas sensors with vanadium oxide and tungsten oxide nanoparticle coated claddings

Renganathan, B.; Sastikumar, D.; Raj, S. Gokul; Ganesan, A. R.

doi:10.1016/j.optcom.2013.10.072

Cited by 43 publications

(15 citation statements)

References 18 publications

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“…CROF sensors with NP-based coatings have been reported in several works, detecting humidity [14,15], ethanol [16], ammonia [17], methanol [18], and other gases [19,20]. For instance, Kodaira et al [20] coated an optical fiber with SiO 2 NPs and poly(diallyldimethyl ammonium chloride) to create mesoporous overlays by LbL.…”

Section: Cladding-removed Optical Fibermentioning

confidence: 99%

Optical Fiber Sensors Based on Nanoparticle-Embedded Coatings

2015

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The use of nanoparticles (NPs) in scientific applications has attracted the attention of many researchers in the last few years. The use of NPs can help researchers to tune the physical characteristics of the sensing coating (thickness, roughness, specific area, refractive index, etc.) leading to enhanced sensors with response time or sensitivity better than traditional sensing coatings. Additionally, NPs also offer other special properties that depend on their nanometric size, and this is also a source of new sensing applications. This review focuses on the current status of research in the use of NPs within coatings in optical fiber sensing. Most used sensing principles in fiber optics are briefly described and classified into several groups: absorbance-based sensors, interferometric sensors, fluorescence-based sensors, fiber grating sensors, and resonance-based sensors, among others. For each sensor group, specific examples of the utilization of NP-embedded coatings in their sensing structure are reported.

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Section: Cladding-removed Optical Fibermentioning

confidence: 99%

Optical Fiber Sensors Based on Nanoparticle-Embedded Coatings

2015

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“…Due to the high numerical aperture (NA), proper curvature, and secure processing, plastic optical fibers (POFs) have attracted significant attention from researchers and have been widely used in different applications such as gas detection, biomedical, and other fields [1][2][3][4]. The D-shaped [5,6], tapered [7], U-shaped [8], and twisted macro-bend coupling structures [9] have been fabricated and characterized. In the above structures, tapered POFs can strongly enhance the evanescent wave (EW) power in the cladding, increasing environmental sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Ethanol Gas Sensitivity Sensor Based on Roughened POF Taper of Modified Polypyrrole Films

Liu

Hou

2020

Sensors

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The three polypyrrole (PPy) films with different mixture ratios, namely PPy1, PPy2, and PPy3, were synthesized by chemical oxidation with pyrrole and ferric chloride (FeCl3). The roughened plastic optical fiber (POF) taper assembled PPy films (POF-PPy1, POF-PPy2, and POF-PPy3) were facilely prepared and bent U shape structure for testing ethanol gas at room temperature. The morphologies of the PPy films and the roughened POF taper were studied using electron microscopy. The effect of the three PPy films on the gas response was investigated and the results showed that the POF-PPy2 exhibited a high sensitivity of 5.08 × 10−5 dB/ppm. The detection limit of the sensor was 140 ppm and its response and recovery times were 5 s and 8 s, respectively. The results also showed that as the bending radius decreased, the response and recovery times gradually shortened, while the output power increased. In addition, the proposed sensor has advantages of a low cost and simple structure.

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“…Experimental set up and gas sensing characteristics of ZnO, Ce doped ZnO and Sm2O3 are discussed elsewhere [6][7][8][9] . It consists of light source, gas chamber and photodetector.…”

Section: Methodsmentioning

confidence: 99%

“…Such sensors exhibit high gas sensitivity at high operating temperatures (about 200 o C) [1][2][3][4][5] . A clad-modified with nanocrystalline metal oxide fiber optic gas sensors have been proposed for ambient temperature operation [6][7][8][9] . It is an intensity modulated fiber optic sensor and when the clad-modified region (sensor region) is exposed to a gas, the sensor output light intensity changes.…”

Section: Introductionmentioning

confidence: 99%

Sensing characteristics of clad-modified with nanocrystalline metal oxide fiber optic gas sensor

Sastikumar

Renganathan

2014

SPIE Proceedings

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Clad-modified with nanocrystalline metal oxide fiber optic gas sensors have been proposed for ambient temperature operation. The sensor output light intensity either increases or decreases when the gas concentration is increased. Study shows that optical properties of metal-oxides with air medium influence the gas sensing. Absorption characteristics of nanocrystalline metal oxides ( ZnO, Sm2O3 and Ce doped ZnO etc., ) in air, methanol, ethanol and ammonia are analyzed as well as their effect on gas sensing.

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Fiber optic gas sensors with vanadium oxide and tungsten oxide nanoparticle coated claddings

Cited by 43 publications

References 18 publications

Optical Fiber Sensors Based on Nanoparticle-Embedded Coatings

Optical Fiber Sensors Based on Nanoparticle-Embedded Coatings

Ethanol Gas Sensitivity Sensor Based on Roughened POF Taper of Modified Polypyrrole Films

Sensing characteristics of clad-modified with nanocrystalline metal oxide fiber optic gas sensor

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