Refractive index sensing using ultrasonically crushed polymer optical fibers

2016 ◽  
Vol 10 (1) ◽  
pp. 012201 ◽  
Author(s):  
Shumpei Shimada ◽  
Heeyoung Lee ◽  
Makoto Shizuka ◽  
Hiroki Tanaka ◽  
Neisei Hayashi ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fibers ◽  
Refractive Index Sensing ◽  
Polymer Optical Fibers

Refractive index sensing using V-shaped polymer optical fibers

2015 ◽  
Vol 54 (11) ◽  
pp. 118001 ◽  
Author(s):  
Heeyoung Lee ◽  
Neisei Hayashi ◽  
Yosuke Mizuno ◽  
Kentaro Nakamura
Keyword(s):  
Refractive Index ◽  
Optical Fibers ◽  
Refractive Index Sensing ◽  
Polymer Optical Fibers

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 Comparative study of solution concentration variations for polymer optical fibers sensor

2020 ◽  
Vol 16 (2) ◽  
pp. 140-144
Author(s):  
Hazura Haroon ◽  
Muhamad Naeem Mohd Nazri ◽  
Siti Khadijah Idris ◽  
Hanim Abdul Razak ◽  
Anis Suhaila Mohd Zain ◽  
...  
Keyword(s):  
Refractive Index ◽  
Comparative Study ◽  
Output Power ◽  
Optical Fibers ◽  
Refractive Index Change ◽  
Solution Concentration ◽  
High Refractive Index ◽  
Fiber Optic Sensors ◽  
Polymer Optical Fibers ◽  
Set Up

In this paper, we report a comparative study of fiber optic sensors for the application of aqueous solutions concentration monitoring. A simple, economical, and efficient set-up for liquid concentration measurement system was developed using polymer optical fibers (POFs). Cornstarch, sucrose, and salt solutions with different concentrations were tested, and the output power and the refractive index obtained were compared. The sensitivity of the sensor is found ranging from 0.938 μW/ RIU to 96.9 μW/RIU in term of refractive index change and 0.04298 μW/molL-1 to 0.097 μW/molL-1 in terms of concentration. It has been found that the concentration is proportionally related to its refractive index where high refractive index will experience greater loss since the light rays tend to be refracted out of the fiber instead of being internally reflected. The experimental results also show that as the solution’s concentration increases, the output power decreases.

scholarly journals Refractive-Index Profile Reconstruction in Graded-Index Polymer Optical Fibers Using Raman Spectroscopy

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2251
Author(s):  
Mikel Azkune ◽  
Angel Ortega-Gomez ◽  
Igor Ayesta ◽  
Joseba Zubia
Keyword(s):  
Refractive Index ◽  
Optical Fibers ◽  
Refractive Index Profile ◽  
Graded Index ◽  
Azimuthal Symmetry ◽  
Novel Method ◽  
Molecular Information ◽  
Polymer Optical Fibers ◽  
Profile Reconstruction ◽  
Fiber Characterization

This work reports a novel method to create a 3D map of the refractive index of different graded-index polymer optical fibers (GI-POF), measuring the Raman spectra at different points of their transverse sections. Raman fingerprints provide accurate molecular information of the sample with high spatial resolution. The refractive index of GI-POFs is modified by adding a dopant in the preform; therefore, by recording the intensities of the Raman peaks related to the dopant material, a 3D map of the refractive index is rendered. In order to demonstrate the usefulness of the method, three different GI-POFs were characterized and the obtained results were compared with the information provided by the manufacturers. The results show accurate 3D maps of the refractive index taken in the actual GI-POF end faces, showing different imperfections that manufacturers do not take into account, such as the slight deviations of the azimuthal symmetry. The simplicity and the feasibility of the technique mean this method has high potential for fiber characterization purposes.

scholarly journals Analysis of the use of tapered graded-index polymer optical fibers for refractive-index sensors

2008 ◽  
Vol 16 (21) ◽  
pp. 16616 ◽  
Author(s):  
J. Arrue ◽  
F. Jiménez ◽  
G. Aldabaldetreku ◽  
G. Durana ◽  
J. Zubia ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fibers ◽  
Graded Index ◽  
Refractive Index Sensors ◽  
Polymer Optical Fibers

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.

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