scholarly journals D-Shaped POF Sensors for Refractive Index Sensing—The Importance of Surface Roughness

Sensors ◽  
2019 ◽  
Vol 19 (11) ◽  
pp. 2476 ◽  
Author(s):  
Filipa Sequeira ◽  
Nunzio Cennamo ◽  
Alisa Rudnitskaya ◽  
Rogério Nogueira ◽  
Luigi Zeni ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Refractive Index ◽  
Optical Fibers ◽  
Low Cost ◽  
Water Quality Assessment ◽  
Refractive Index Sensing ◽  
Plastic Optical Fibers ◽  
Index Changes ◽  
Low Cost Manufacturing ◽  
Scattering Losses

In this study the influence of the surface roughness on the transmission capacities of D-shaped plastic optical fibers (POFs) and sensors performance was investigated. Five D-shaped POF sensors were produced and characterized for refractive index sensing between 1.33 and 1.41. The sensors were characterized using a low-cost optical sensing system based on the variation of the transmitted light though the POF with refractive index changes (RI). Higher surface roughness increases the scattering losses through the POF and influences the sensors’ performance; therefore, a balance must be attained. Generally, the best performance was achieved when the sensing region was polished with P600 sandpaper as a final polishing step. Polishing with sandpapers of lower grit size resulted in lower scattering, higher linearity of the sensor response and generally lower performance for RI sensing. A sensor resolution of 10−3–10−4 RIU, dependent on the value of the external refractive index, was obtained through simple and low-cost manufacturing procedures. The obtained results show the importance of surface roughness in the development of POF sensors which can be used in several applications, such as for water quality assessment.

Locally pressed plastic optical fibers for refractive index sensing

2017 ◽  
Author(s):  
Shumpei Shimada ◽  
Heeyoung Lee ◽  
Makoto Shizuka ◽  
Hiroki Tanaka ◽  
Neisei Hayashi ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fibers ◽  
Refractive Index Sensing ◽  
Plastic Optical Fibers

scholarly journals Refractive Index Sensor Based on Twisted Tapered Plastic Optical Fibers

Photonics ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 40 ◽  
Author(s):  
Teng ◽  
Deng ◽  
Liu ◽  
Yang ◽  
Yuan ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fibers ◽  
Simple Structure ◽  
External Medium ◽  
Low Cost ◽  
The Other ◽  
Refractive Index Sensor ◽  
Coupling Ratio ◽  
Plastic Optical Fibers ◽  
Drawing Method

We proposed a refractive index (RI) sensor employing two twisted tapered plastic optical fibers (POFs). The tapered POFs were fabricated by a heating and drawing method and were twisted around each other to form a coupled structure. The sensor consisted of two input ports, a twisted region, and two output ports. The tapered POF could make the light couple from one POF to the other easily. The twisted tapered POFs could constitute a self-referencing sensor, and by monitoring the changes of the coupling ratio, the variations of the external medium RIs could be measured. The RI sensing performances for the sensors with different fiber diameters and twisted region lengths were studied. The sensitivities of 1700%/RIU and −3496%/RIU in the RI ranges of 1.37–1.41 and 1.41–1.44 were obtained, respectively. The sensor is a low-cost solution for liquid RI measurement, which has the features of simple structure and easy fabrication.

Low-Cost Sensing with Plastic Optical Fibers—From Turbidity and Refractive Index to Chemical Sensing

Proceedings ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 12
Author(s):  
Filipa Sequeira ◽  
Daniel Duarte ◽  
Rogério Nogueira ◽  
Lúcia Bilro
Keyword(s):  
Refractive Index ◽  
Quality Assessment ◽  
Optical Fibers ◽  
Chemical Sensing ◽  
Low Cost ◽  
Research Groups ◽  
Water Contaminants ◽  
Sensing Systems ◽  
Site Monitoring ◽  
Plastic Optical Fibers

This manuscript presents low-cost sensing systems for the monitoring of liquids, namely water and beverages quality assessment, with remote and in-site monitoring capabilities. The collaboration with several research groups allowed the development of smart optical platforms and low-cost sensors based on plastic optical fibers for the measurement of turbidity, color, refractive index and water contaminants.

Screw-Shaped Plastic Optical Fibers for Refractive Index Sensing

2020 ◽  
Vol 20 (10) ◽  
pp. 5237-5242 ◽  
Author(s):  
Peng Xue ◽  
Bingcheng Wu ◽  
Haiyang Bao ◽  
Jie Zheng
Keyword(s):  
Refractive Index ◽  
Optical Fibers ◽  
Refractive Index Sensing ◽  
Plastic Optical Fibers

scholarly journals Refractive Index Sensing with D-Shaped Plastic Optical Fibers for Chemical and Biochemical Applications

Sensors ◽  
2016 ◽  
Vol 16 (12) ◽  
pp. 2119 ◽  
Author(s):  
Filipa Sequeira ◽  
Daniel Duarte ◽  
Lúcia Bilro ◽  
Alisa Rudnitskaya ◽  
Maria Pesavento ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fibers ◽  
Refractive Index Sensing ◽  
Plastic Optical Fibers

scholarly journals Analysis of Effects of Surface Roughness on Sensing Performance of Surface Plasmon Resonance Detection for Refractive Index Sensing Application

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6164
Author(s):  
Treesukon Treebupachatsakul ◽  
Siratchakrit Shinnakerdchoke ◽  
Suejit Pechprasarn
Keyword(s):  
Surface Roughness ◽  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Figure Of Merit ◽  
Root Mean Square Roughness ◽  
Performance Parameters ◽  
Refractive Index Sensing ◽  
Sensing Performance

This paper provides a theoretical framework to analyze and quantify roughness effects on sensing performance parameters of surface plasmon resonance measurements. Rigorous coupled-wave analysis and the Monte Carlo method were applied to compute plasmonic reflectance spectra for different surface roughness profiles. The rough surfaces were generated using the low pass frequency filtering method. Different coating and surface treatments and their reported root-mean-square roughness in the literature were extracted and investigated in this study to calculate the refractive index sensing performance parameters, including sensitivity, full width at half maximum, plasmonic dip intensity, plasmonic dip position, and figure of merit. Here, we propose a figure-of-merit equation considering optical intensity contrast and signal-to-noise ratio. The proposed figure-of-merit equation could predict a similar refractive index sensing performance compared to experimental results reported in the literature. The surface roughness height strongly affected all the performance parameters, resulting in a degraded figure of merit for surface plasmon resonance measurement.

Sign in / Sign up

Export Citation Format

Share Document