4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=10&confId=86">The Proceedings of SAIP2016</a> published on 24 December 2017

PIRANA, an all optical time-domain ptychographic pulse characterisation method

5 Jul 2016, 14:40
20m
5C (Kramer Law building)

5C

Kramer Law building

UCT Middle Campus Cape Town
Oral Presentation Track C - Photonics Photonics

Speaker

Mr Dirk-Mathys Spangenberg (University of Stellenbosch)

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>

Pulse characterization of ultrashort laser pulses cannot be done directly as no detector is fast enough. Various methods utilising nonlinear second harmonic and sum frequency generation have been developed since such as FROG, SPIDER, MIIPS etc. We migrated an iterative spatial lens-less imageing technique, ptychography, to the time domain and modified the reconstruction algorithm such that it can be used to do pulse characterisation. The proof of principle experiment was done with a dynamic optical setup which uses spatial light modulators (SLM) in order to generate arbitrary pulse shapes which is then measured with the adapted time-domain ptychography method. Recently we have developed an optical setup which can do the time-domain ptychographic pulse characterisation methods which does not require the use of an SLM called PIRANA.

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

no

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

Erich Rohwer

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, N/A)?

N/A

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

yes

Primary author

Mr Dirk-Mathys Spangenberg (University of Stellenbosch)

Co-authors

Prof. Erich Rohwer (University of Stellenbosch) Dr Michael Bruegmann (Institute of Applied Physics, University of Bern) Prof. Thomas Feurer (Institute of Applied Physics, University of Bern)

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