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

Demonstration of a new ultrafast pulse reconstruction modality – PIRANA

1 Jul 2015, 16:10
1h 50m
Board: C.200
Poster Presentation Track C - Photonics Poster2

Speaker

Mr Ruan Viljoen (Stellenbosch University)

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

Erich Rohwer egr@sun.ac.za, University of Stellenbosch

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

MSc

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>

Ptychography, a phase retrieval scheme used in lensless imaging, is an iterative procedure to reconstruct the phase and amplitude of an object. It has recently been shown that ptychography can be applied to reconstruct temporal objects under the condition that the illumination pulse is fully characterised. We have modified this procedure to be able to reconstruct temporal objects (recovering its amplitude and phase), with an unknown illumination pulse. In this work we explain this iterative procedure and its experimental realisation. We compare results with a known reconstruction modality such as FROG (a similar procedure for recovering the phase of a temporal object). We specifically highlight the removal of the phase ambiguity inherent in second order FROG using PIRANA.

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

No

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)

No

Primary author

Mr Dirk-Mathys Spangenberg (University of Stellenbosch)

Co-authors

Prof. Erich Rohwer (University of Stellenbosch) Dr Pieter Neethling (Laser Research Institute, University of Stellenbosch) Mr Ruan Viljoen (Stellenbosch University) Prof. Thomas Feurer (IAP, University of Bern)

Presentation Materials

There are no materials yet.