scholarly journals Evaluation of Viscosity Dependence of the Critical Meniscus Height with Optical Fiber Sensors

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 8130
Author(s):  
Leonardo Binetti ◽  
Fraser Simpson ◽  
Lourdes S. M. Alwis

Conventional means of data extraction using optical fiber interrogators are not adequate for fast-paced detection of a target parameter. In this instance, the relationship between the critical meniscus heights (CMH) of several liquids to the extraction speed of a rod submerged in them, have been analyzed. A limitation of a previous interrogator used for the purpose had been light absorption by the liquid due to the used bandwidth of the readily-available light source, i.e., C-band. The newly proposed technique addresses this limitation by utilizing a broadband light source instead, with a Si-photodetector and an Arduino. In addition, the Arduino is capable of extracting data at a relatively faster rate with respect to the conventional optical interrogator. The use of a different operational wavelength (850 nm instead of 1550 nm) increased the r2 and the sensitivity of the sensor. The new setup can measure surface chemistry properties, with the advantage of being comparatively cheaper than the conventionally available interrogator units, thereby providing a suitable alternative to conventional measurement techniques of liquid surface properties, while reducing material waste, i.e., in terms of the required volume for detection of a target parameter, through the use of optical fiber.

1991 ◽  
Author(s):  
Alexandr T. Semenov ◽  
Boris B. Elenkrig ◽  
Valerii N. Logozinskii

2014 ◽  
Vol 933 ◽  
pp. 487-490
Author(s):  
Shinn Fwu Wang ◽  
Cheng Lung Hsu ◽  
Fu Hsi Kao ◽  
An Li Liu

In this paper, the study on response of a broadband light source for an optical fiber sensor (OFS) based on surface plasmon resonance (SPR) technology is presented. The OFS is made of a multimode optical fiber which cladding was removed and coated with two layers of metal films. As a broadband light source is launched into the OFS at a suitable incident angle, we can obtain the intensity at the output of the optical fiber sensor. With the structure, the refractive index detection can be made by the SPR spectra that are obtained by an Optical Spectrum Analyzer (OSA). The OFS could be valuable for chemical, biological and biochemical sensing, etc. It has some advantages, such as, high resolution and stability, small size and real-time measurement.


2011 ◽  
Vol 58-60 ◽  
pp. 2688-2692
Author(s):  
Feng Hong Chu ◽  
Lei Ye ◽  
Jian Qiang Zhang ◽  
Ben Shang Yang ◽  
Mian Zhao ◽  
...  

A nitro aromatic explosives sensor based on fluorescence quenching was studied in this paper. U-shaped plastic optical fiber was used as sensor head and light emitting conjugated polymer MEH-PPV as fluorescence indictor. The light source was modulated sinusoidal to eliminate the external light disturbance. TNT quenching characteristics of fluorescence intensity were measured; When TNT concentration was lower than 10mg/ml, the relationship between fluorescence intensity and TNT concentration was linearly, when TNT concentration was higher than 10mg/100ml the obtained characteristics showed deviation from linear relation described by Stern-Volmer equation.


Author(s):  
Norbert Tarjányi ◽  
Daniel Kacik ◽  
Raphael Jamier ◽  
Georges Humbert ◽  
Philippe Roy ◽  
...  

2016 ◽  
Vol E99.C (3) ◽  
pp. 381-384 ◽  
Author(s):  
Takuma YASUDA ◽  
Nobuhiko OZAKI ◽  
Hiroshi SHIBATA ◽  
Shunsuke OHKOUCHI ◽  
Naoki IKEDA ◽  
...  

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