Single-Mode Perfluorinated Polymer Optical Fibers With Refractive Index of 1.34 for Biomedical Applications

ABSTRACTHigh-bandwidth graded-index (GI) polymer optical fiber (POF) and single-mode POF with good mechanical properties were successfully obtained by our interfacial-gel polymerization technique. The bandwidth of the GI POF is about 1 GHz · km which is two hundred times larger than that of the conventional step-index (SI) POF. The minimum attenuation of transmission is 56 dB/km at 688-nm wavelength and 94 dB/km at 780-nm wavelength. The single-mode POF in which the core diameter was 3–15 μ m and the attenuation of transmission was 200 dB/km at 652-nm wavelength was successfully obtained for the first time.

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Refractive-index profiling of single-mode optical fibers and performs

Applied Optics ◽

10.1364/ao.18.004006 ◽

1979 ◽

Vol 18 (23) ◽

pp. 4006 ◽

Cited By ~ 21

Author(s):

Herman M. Presby ◽

Dietrich Marcuse ◽

William G. French

Keyword(s):

Refractive Index ◽

Optical Fibers ◽

Single Mode

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Comparative study of solution concentration variations for polymer optical fibers sensor

Malaysian Journal of Fundamental and Applied Sciences ◽

10.11113/mjfas.v16n2.1451 ◽

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.

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

Materials ◽

10.3390/ma13102251 ◽

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.

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