Fiber optic sensing of liquid refractive index

Banerjee, Agnid; Mukherjee, Sayak; Verma, Rishi Kumar; Jana, Biman; Khan, Tapan K.; Chakroborty, Mrinmoy; Das, Ruma; Biswas, Shyamal; Saxena, Ashutosh; Singh, Vandana

doi:10.1016/j.snb.2006.09.063

Cited by 107 publications

(44 citation statements)

References 49 publications

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“…Modern approaches based on fiber optic sensing [26], or made in a total internal reflection configuration [27], should provide a sufficient accuracy to detect correlation effects even for strongly turbid samples. Yet, when using methods relying on so small penetration depths, care should be taken to avoid probing correlation effects on the particle distribution at the interface between the solution and the sensor wall, rather than bulk structural properties.…”

Section: F Feasibility Of the Experimental Determination Of Correlatmentioning

confidence: 99%

Optical extinction, refractive index, and multiple scattering for suspensions of interacting colloidal particles

Parola

Piazza

Degiorgio

2014

The Journal of Chemical Physics

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We provide a general microscopic theory of the scattering cross-section and of the refractive index for a system of interacting colloidal particles, exact at second order in the molecular polarizabilities.In particular: a) we show that the structural features of the suspension are encoded into the forward scattered field by multiple scattering effects, whose contribution is essential for the so-called "optical theorem" to hold in the presence of interactions; b) we investigate the role of radiation reaction on light extinction; c) we discuss our results in the framework of effective medium theories, presenting a general result for the effective refractive index valid, whatever the structural properties of the suspension, in the limit of particles much larger than the wavelength; d) by discussing stronglyinteracting suspensions, we unravel subtle anomalous dispersion effects for the suspension refractive index.

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Section: F Feasibility Of the Experimental Determination Of Correlatmentioning

confidence: 99%

Optical extinction, refractive index, and multiple scattering for suspensions of interacting colloidal particles

Parola

Piazza

Degiorgio

2014

The Journal of Chemical Physics

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“…Optical fiber sensors have several advantages over electrical based sensors in many chemical and biological applications [1]. The most intriguing advantages lies in the miniaturization and response time.…”

Section: Introductionmentioning

confidence: 99%

Reduced Graphene Oxide nano-composites layer on fiber optic tip sensor reflectance response for sensing of aqueous ethanol

Rosli

Arasu

Noor

et al. 2016

J. Eur. Opt. Soc.-Rapid Publ.

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In this study, the used of tapered optical fiber tip as sensors coated with reduced Graphene Oxide (rGO) is investigated. The resultant rGO nanocomposites coated on the tapered fiber sensor were characterized by X-ray Diffraction (XRD), Raman spectroscopy, and field emission scanning electron microscopy (FESEM). Optimization of the rGO layer and the tapering parameters are found and the sensing capability of the device is tested using different concentrations of ethanol in water. The nanocomposite layer improved the performance of the sensor by demonstrating high sensitivity to aqueous ethanol when interrogated in the visible region using a spectrometer in the optical wavelength range of 500-700 nm. The reflectance response of the rGO coated fiber tip reduced linearly, upon exposure to ethanol concentrations ranging between 20-80 %.

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“…Sang et al [13] demonstrated the temperature insensitive FBG chemical sensor by etching half of the region cladding. An optical fiber, partially striped of its cladding is shown to sense refractive index of a liquid in which uncladded sensing region is immersed [14].…”

Section: Introductionmentioning

confidence: 99%

Concentration and refractive index sensor for methanol using short period grating fiber

Raikar

Lalasangi

Kulkarni

et al. 2011

Optik

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Fiber optic sensing of liquid refractive index

Cited by 107 publications

References 49 publications

Optical extinction, refractive index, and multiple scattering for suspensions of interacting colloidal particles

Optical extinction, refractive index, and multiple scattering for suspensions of interacting colloidal particles

Reduced Graphene Oxide nano-composites layer on fiber optic tip sensor reflectance response for sensing of aqueous ethanol

Concentration and refractive index sensor for methanol using short period grating fiber

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