Towards the development of a MIR NOPA for time-domain ptychography

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dc.contributor.advisorBosman, Gurthwin W.en_ZA
dc.contributor.advisorNeethling, Pieter H.en_ZA
dc.contributor.authorDe Beer, Anthonieen_ZA
dc.contributor.otherStellenbosch University. Faculty of Science. Dept. of Physics.en_ZA
dc.date.accessioned2021-04-28T12:52:23Z
dc.date.available2021-04-28T12:52:23Z
dc.date.issued2021-03
dc.descriptionThesis (MSc)--Stellenbosch University, 2021.en_ZA
dc.description.abstractENGLISH ABSTRACT: This thesis discusses a noncollinear optical parametric amplifier as a source of ultrafast mid-infrared light for spectroscopic experiments and aims to provide a consistent method for the generation thereof. The underlining theory and fundamental principles of this device is outlined as well as various experimental considerations. A design for an experimental setup to generate suitable ultrafast mid-infrared light is proposed and preliminary optical devices are implemented. Generation of a 160 nm bandwidth, near-infrared supercontinuum centred at 1067 nm is shown to be inadequate for the generation of mid-infrared pulses. Parasitic second harmonic-, sum frequency and difference frequency generation processes are also shown to impede mid-infrared generation. These restricting experimental phenomena are highlighted and methods to bypass these limits are given. Finally, as a demonstration of usefulness of such a source of infrared pulses, the novel time-domain ptychographic measurement, HIPPY, of a material’s response to mid-infrared light is simulated.en_ZA
dc.description.abstractAFRIKAANSE OPSOMMING: Hierdie tesis bespreek die gebruik van ‘n nie-kolineêre optiese parametriese versterker as ‘n bron van ultravinnige middelinfrarooi ligpulse en poog om ‘n metode te voor te lê vir die generasie daarvan. The onderliggende teorie en fundamentele beginsels van hierdie optiese toestel word bespreek asook verskeie eksperimentele oorwegings aangaande die ontwerp. ‘n Ontwerp van ‘n optiese toestel vir die generering van ultravinnige middelinfrarooi lig word voorgestel en voorafgaande eksperimentele opstellings is geimplementeer. Die generasie van ‘n supercontinuum pulse by 1067 nm met ‘n bandwydte van 160 fs word getoon om ongepas te wees vir middleinfrarooi pulse generasie. Parasitiese tweede harmoniek-, som frekwensie- en verskil frekwensie generasie prosesse word ook getoon om middelinfrarooi generasie te verhoed. Verskynsels wat hierdie generasie belemmer word uitgelig met voorgestelde metodes om dit te beperk. Laastens, as ‘n demonstrasie van die nut van infrarooi pulse, is ‘n nuwe tyd gebieds tigografiese tegniek, HIPPY, gesimuleeraf_ZA
dc.description.versionMastersen_ZA
dc.format.extentx, 45 pages : illustrationsen_ZA
dc.identifier.urihttp://hdl.handle.net/10019.1/110358
dc.language.isoen_ZAen_ZA
dc.publisherStellenbosch : Stellenbosch Universityen_ZA
dc.rights.holderStellenbosch Universityen_ZA
dc.subjectUltrafast mid-infrared lighten_ZA
dc.subjectUCTDen_ZA
dc.subjectTime-domain analysisen_ZA
dc.subjectPtychographyen_ZA
dc.subjectParametric amplifiersen_ZA
dc.subjectInfrared spectroscopyen_ZA
dc.subjectMid-infrared lighten_ZA
dc.titleTowards the development of a MIR NOPA for time-domain ptychographyen_ZA
dc.typeThesisen_ZA
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