8-12 July 2013
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=13&confId=32"><font color=#ff0000>SAIP2013 PROCEEDINGS AVAILABLE</font></a>

Azimuthal beam superpositions with intra-cavity rings

9 Jul 2013, 17:40
1h
Poster Presentation Track C - Photonics Poster1

Speaker

Mr Darryl Naidoo (Council for Scientific and Industrial Research)

Abstract content <br> &nbsp; (Max 300 words)

We demonstrate the intra-cavity generation of a coherent superposition of Laguerre-Gaussian modes of zero radial order but opposite azimuthal order. The superposition is achieved through a set of amplitude rings in a diode-pumped solid-state resonator. By adjusting the number of rings and their thicknesses we can produce modes up to azimuthal order 12. To infer the purity of these modes we perform a full azimuthal modal decomposition by an inner product executed on a phase-only spatial light modulator. We also investigate if there is a phase difference between the Laguerre-Gaussian modes to identify if the phase difference is spatially or temporally dependent. A hallmark of a phase difference is the rotation of the field as the beam propagates into the far field or a rotation of the field at a fixed position over time.

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

Yes

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

No

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

PhD

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

Andrew Forbes, aforbes1@csir.co.za
CSIR, University of Stellenbosch

Primary author

Mr Darryl Naidoo (Council for Scientific and Industrial Research)

Co-authors

Prof. Andrew Forbes (Council for Scientific and Industrial Research) Prof. Kamel Ait-Ameur (Centre de Recherche sur les Ions, les Matériaux et la Photonique) Dr Michael Fromager (Centre de Recherche sur les Ions, les Matériaux et la Photonique) Mr Sandile Ngcobo (Council for Scientific and Industrial Research) Dr Thomas Godin (Institut FEMTO-ST)

Presentation Materials

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