Results 221 to 230 of about 22,619 (253)
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Optical sensing of concentration and refractive index of pigments in a suspension
Applied Optics, 2010We describe an immersion liquid and data analysis method for the simultaneous determination of the refractive index and concentration of pigments by measurement of light transmission of suspensions. A new innovation is that, in the event that two different pigments are simultaneously present in a suspension, it is possible to detect the refractive ...
Ilpo, Niskanen +2 more
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Fiber optic sensing of liquid refractive index
Sensors and Actuators B: Chemical, 2007An optical fiber, partially stripped of its cladding is shown to sense refractive index of a liquid in which the uncladded sensing region is immersed, to a high degree of precision and over a wide range of refractive index. The slope of sensor response is found to be non linear, can have either sign and can change sign at around refractive index of the
Argha Banerjee +2 more
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S-Fiber Probe for Refraction Index Sensing
2017A refractive index (RI) sensor which based on an S-tapered fiber probe (STFP) with a silver mirror on its end facet is demonstrated. The fiber probe has a compact size of about 1 mm, making it proper for sensing in narrow or limited space. It is stiff to bend due to the short probe structure, leading to avoid the cross-sensitivity of bending.
Xian Hui Yang +5 more
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An Introduction to Plasmonic Refractive Index Sensing
2012This chapter introduces the basics of plasmon-based refractometric sensing, its application in label-free biomolecular analysis, and discusses differences between propagating plasmons and localized plasmons in terms of refractive index sensitivity, sensing volume and measurement methodology.
Mikael Svedendahl, Si Chen, Mikael Käll
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A Novel Intensity-Based Sensor Platform for Refractive Index Sensing
2019In the present investigation a new intensity-based sensor platform for refractive index sensing is presented. It is based on a special holder, a slab waveguide and two Plastic optical fibers (POFs). In particular, we present a comparison between two different configurations: the slab waveguide with and without a buffer layer.
Cennamo N., Mattiello F., Zeni L.
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Uncladded sensing fiber for refractive index measurement
AIP Conference Proceedings, 2016The formation of chemically etched optical fiber for use in refractive index sensor is addressed. This presented design of a refractive index (RI) sensor is based on recording the power loss exhibited by radiation propagating through an etched multimode fiber (MMF) immersed in the liquid under study.
V. Bhardwaj +3 more
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A Microfiber Half Coupler for Refractive Index Sensing
IEEE Photonics Technology Letters, 2017We report a reflection mode based microfiber half coupler probe for refractive index (RI) sensing. The probe was made by cleaving a fused 2 $\times$ 2 optical fiber coupler at the center of the tapered region. When used for RI sensing, the reflection spectrum blueshifted as the surrounding RI increased.
Qi Zhang +5 more
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Photonic Bandgap Fiber for Infiltration-Free Refractive-Index Sensing
IEEE Journal of Selected Topics in Quantum Electronics, 2012We report a novel photonic bandgap sensor, comprising a D-shaped fiber fabricated via side polishing. It takes advantage of measurand-elicited refractive-index profile changes upon exposure of its side-polished region to an ambient liquid. The bandgap shift can be induced by perturbations in close proximity to the fiber core, such as the change of ...
Yong, Derrick +7 more
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Polarization state-based refractive index sensing with plasmonic nanostructures
Nanoscale, 2015A theoretical value of figure of merit exceeding 1700 is achieved with a polarization state-based refractive index sensing approach.
Shao-Ding, Liu +5 more
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Humidity sensing by measurement of the refractive index of air
13th International Conference on Optical Fiber Sensors, 1999A novel remote fiberised humidity sensor is described. The sensor works linearly over the full range of humidity. Its accuracy is 1.6% with a fast response time and does not suffer from ageing, or hysteresis.
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