Optical sensing of hydrocarbons in air or in water using UV absorption in the evanescent field of fibers

Schweizer, Gerhard; Latka, Ines; Lehmann, H.; Willsch, Reinhardt

doi:10.1016/s0925-4005(97)80185-2

Cited by 38 publications

(18 citation statements)

References 4 publications

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“…The optical fiber prototype simply proves that the sensor could be fabricated and the simulation results are intriguing for an actual application. The next steps are: i) to optimize the fiber coating process with the PDMS in order to reduce the intrinsic propagation losses, ii) to enhance the mechanical properties of the sensor, iii) to identify the best PDMS methyl/phenyl group ratios [30] to refine the sensor optimization, and iv) test/measurement of PDMS response time and reversibility to extract hydrocarbons from water solution [19,31].…”

Section: Discussionmentioning

confidence: 99%

Design of exposed-core fiber for methadone monitoring in biological fluids

Palmisano

Prudenzano

Warren‐Smith

et al. 2011

Journal of Non-Crystalline Solids

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Section: Discussionmentioning

confidence: 99%

Design of exposed-core fiber for methadone monitoring in biological fluids

Palmisano

Prudenzano

Warren‐Smith

et al. 2011

Journal of Non-Crystalline Solids

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“…Sensitive cladding [4] Cladding is specially designed to be sensitive to species to be detected Fibre tapering [5] Core/clad is reduced to increase the evanescent field magnitude and penetration depth.…”

Section: Basic Principlementioning

confidence: 99%

Weaving our way towards a new generation of fibre-optic chemical sensors based on spider silk

Tow

Chow

Thévenaz

et al. 2016

2016 IEEE 6th International Conference on Photonics (ICP)

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Abstract-From the spider's perspective, silk is not only a building material but also a safety net, a weapon and a sensory organ to detect the presence of preys on its web. Indeed, this primeval material has been shaped over hundreds of millions of years by spiders to create a myriad of silk fibre types with different level of toughness, elasticity, stickiness depending on its attributed function in the web. From a human perspective, scientists are currently working on harnessing all the extraordinary properties of this material for applications spiders would never thought of, from biocompatible tissue engineering (enhancement of skin regeneration and nerve guides) to biodegradable electronics and development of specialised textile and composites. However, the potential of using spider silk fibre for chemical sensing has been overlooked. In this communication, we will explore the potential of using spider silk as a new type of fibre optic chemical sensor in a fully bio-inspired approach.

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“…In other words the contaminated polymer exhibits a complex refractive index. The propagation mode, because of the tail of the electromagnetic field profile in polymeric overlay, suffers a power attenuation due to the hydrocarbon (Schwotzer et al 1997;Buerck et al 2001).…”

Section: Theorymentioning

confidence: 99%

“…This is an interesting result because it indicates the appropriate thickness of the PDMS layer. Larger PDMS thickness is not suitable because can cause a worsening of the sensor velocity response (Schwotzer et al 1997) due to the finite time required for the complete distribution of the hydrocarbon in the polymer.…”

Section: Design Of Toluene Sensormentioning

confidence: 99%

Design of an optical sensor array for hydrocarbon monitoring

et al. 2009

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Evanescent field optical sensors are accurately designed for hydrocarbon monitoring in water. Various kinds of waveguide sensors are optimized by considering a polydimethylsiloxane polymeric overlay as sensor region. The simulation results suggest that the selection of a suitable waveguide cross section can enhance the sensor performance. In particular, the hollow waveguide sensor exhibits very intriguing performance, the absorbance being quite linear with respect to the contaminant concentration. For the toluene pollution the absorbance exhibits a slope S A TE = 2.52 × 10 −2 ppm −1 for a waveguide reference length L = 1.18 mm. In order to simultaneously detect different pollutants in water such as toluene, benzene, chlorobenzene and ethilbenzene, an array of four miniaturized hollow waveguide sensors is designed.

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Optical sensing of hydrocarbons in air or in water using UV absorption in the evanescent field of fibers

Cited by 38 publications

References 4 publications

Design of exposed-core fiber for methadone monitoring in biological fluids

Design of exposed-core fiber for methadone monitoring in biological fluids

Weaving our way towards a new generation of fibre-optic chemical sensors based on spider silk

Design of an optical sensor array for hydrocarbon monitoring

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