28 June 2015 to 3 July 2015
Africa/Johannesburg timezone
SAIP2015 Proceeding published on 17 July 2016

Communication through fibres using cylindrical vector vortex modes.

2 Jul 2015, 14:40
20m
Oral Presentation Track C - Photonics Photonics

Speaker

Mr Bienvenu Ndagano (University of the Witwatersrand)

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

No

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

Optical fibres have become, over the years, widely used in telecommunications because of their low loss and high bandwidth. In this study we explore ways in which to increase the bandwidth that are not currently used in fibre communication. Our work demonstrates that using the natural spatial modes of optical fibres, we can effectively encode and decode digital information. This is made possible by using the quantised orbital angular momentum (OAM) density of the fibre modes. The OAM density spans an infinite dimensional Hilbert space allowing, in theory, for an infinite amount of information to be communicated. We demonstrate the generation and detection of both scalar and vector vortex modes. These cylindrical vector vortex modes are close approximations to the natural fibre modes and exhibit non-separability between azimuthally symmetric polarisation and the spatial mode distribution. Further, we show that these modes are more robust in carrying information through fibres as they maintain their polarisation state and OAM density.

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

Yes

Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)

Yes

Main supervisor (name and email)<br>and his / her institution

Andrew Forbes, andrew.forbes2@wits.ac.za, University of the Witwatersrand

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

Msc

Primary author

Mr Bienvenu Ndagano (University of the Witwatersrand)

Co-authors

Prof. Andrew Forbes (CSIR) Dr Melanie McLaren (University of the Witwatersrand)

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