Polymer optical fibres, preparation of the step: index and gradient, index polymer preforms and fibres

1990 ◽  
Author(s):  
Anna B. Wojcik
Keyword(s):  
Optical Fibres ◽  
Gradient Index ◽  
Step Index

scholarly journals Parabolic Pulse Generation Using Tapered Microstructured Optical Fibres

2008 ◽  
Vol 2008 ◽  
pp. 1-10 ◽  
Author(s):  
Natasha Vukovic ◽  
Neil G. R. Broderick ◽  
Francesco Poletti
Keyword(s):  
Pulse Shape ◽  
Pulse Shaping ◽  
Numerical Study ◽  
Pulse Generation ◽  
Optical Fibres ◽  
Step Index ◽  
Index Fibre ◽  
Microstructured Optical Fibres ◽  
Misfit Parameter ◽  
Better Than

This paper presents a numerical study of parabolic pulse generation in tapered microstructured optical fibres (MOFs). Based on our results and the algorithms presented, one can determine the linear taper profile (starting and finishing pitch values and taper length) needed to achieve parabolic pulse shaping of an initial Gaussian pulse shape with different widths and powers. We quantify the evolution of the parabolic pulse using the misfit parameter and show that it is possible to reach values significantly better than those obtained by a step index fibre.

Fibre Optic Development at the AAO

1982 ◽  
Vol 4 (4) ◽  
pp. 477-479 ◽  
Author(s):  
P. M. Gray ◽  
M. M. Phillips ◽  
A. J. Turtle ◽  
R. Ellis
Keyword(s):  
Data Transmission ◽  
Optical Fibres ◽  
Aperture Size ◽  
Fibre Optic ◽  
Core Size ◽  
Step Index ◽  
Light Guides

Work on the development and use of optical fibres as light guides in astronomical spectroscopy has been underway at the AAO for over a year now. The fibres used are step-index polymer-clad silica with a core size of 200 microns giving an aperture size of 1.3 arcsec at the AAT f/8 focus. They are optimised for data transmission with losses below 5dB/km at a wavelength of 800 nm. The blue transmission is somewhat lower, typically 500dB/km at 300nm and 90dB/km at 400nm but over the short 2m length used these attenuations give transmissions of 79% and 96% respectively.

scholarly journals Analysis of intrinsic coupling loss in multi-step index optical fibres

2005 ◽  
Vol 13 (9) ◽  
pp. 3283 ◽  
Author(s):  
Gotzon Aldabaldetreku ◽  
Gaizka Durana ◽  
Joseba Zubia ◽  
Jon Arrue ◽  
Felipe Jiménez ◽  
...  
Keyword(s):  
Optical Fibres ◽  
Coupling Loss ◽  
Step Index

scholarly journals Gratings in Structured Optical Fibres

2008 ◽  
Vol 2008 ◽  
pp. 1-19 ◽  
Author(s):  
John Canning ◽  
Nathaniel Groothoff ◽  
Kevin Cook ◽  
Cicero Martelli ◽  
Alexandre Pohl ◽  
...  
Keyword(s):  
Optical Fibre ◽  
Optical Fibres ◽  
Straightforward Manner ◽  
Step Index ◽  
Near Ir ◽  
Single Material ◽  
Structured Silica

Grating writing in structured optical fibres and their properties and applications are reviewed. To date, most gratings have been written in a straightforward manner into structured fibres containing a photosensitive germanosilicate step-index core. However, gratings have also been written directly into single material, structured silica fibres and into air-clad cores using two and higher-photon processes with both UV and near IR pulsed (nanosecond-femtosecond) light. Given the intrinsic-added functionality possible within a structured optical fibre, structured fibre gratings offer further capabilities for sensors, diagnostics, lasers, and devices.

scholarly journals Measurement of 60CO gamma radiation induced attenuation in multimode step-index POF at 530 nm

2013 ◽  
Vol 28 (2) ◽  
pp. 158-162
Author(s):  
Milan Kovacevic ◽  
Aleksandar Djordjevic ◽  
Svetislav Savovic ◽  
Jovan Bajic ◽  
Dragan Stupar ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
High Energy Physics ◽  
High Energy ◽  
Nuclear Industry ◽  
Optical Fibres ◽  
Space Applications ◽  
Step Index ◽  
Total Radiation Dose ◽  
Radiation Induced ◽  
60Co Gamma Radiation

As optical fibres are used ever more extensively in space applications, nuclear industry, medicine and high-energy physics experiments, it has become essential to investigate the influence of ionizing radiation on their characteristics. In this work, the radiation-induced attenuation at 530 nm is investigated experimentally in step-index multimode polymethyl-methacrylate plastic optical fibres exposed to low dose-rate gamma radiation. Cumulative doses ranged from 50 Gy to 500 Gy. The radiation induced attenuation has been empirically found to obey the power law RIA= aDb, where D is the total radiation dose and a and b are the constants determined by fitting.

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