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Manipulation of short pulses
Thesis (MSc)--Stellenbosch University, 2013.
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2013
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| _version_ | 1867613805811335168 |
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| access_status_str | Open Access |
| author | Okoye, Raphael |
| author2 | Rohwer, Erich G. |
| author_browse | Okoye, Raphael Rohwer, Erich G. |
| author_facet | Rohwer, Erich G. Okoye, Raphael |
| author_sort | Okoye, Raphael |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MSc)--Stellenbosch University, 2013. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/85576 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:41:59.323Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/85576 Manipulation of short pulses Okoye, Raphael Rohwer, Erich G. Schwoerer, Heinrich Neethling, Pieter H. Stellenbosch University. Faculty of Science. Dept. of Physics. Group delay dispersion Femtosecond lasers Laser pulses, Ultrashort Dissertations -- Physics Theses -- Physics Thesis (MSc)--Stellenbosch University, 2013. ENGLISH ABSTRACT: An ultra-fast laser pulse can be described in the time or frequency domain. If the timebandwidth product of an ultra-fast pulse is not satisfied, then the pulse is stretched. Stretching can be described in the time or frequency domain. In the time domain, it is called a chirp and in the frequency domain, it is known as the group delay dispersion GDD. Various techniques can be used to stretch and compress laser pulses. In this project, a prism pulse compressor used for compressing stretched pulses was built. A 200nm supercontinnum generated in an all normal dispersion photonic crystal fibre (ANDi-PCF) was compressed using the prism pulse compressor from 2ps to 140fs. The experiment and physical interpretation presented in this project suggest that a shorter pulse duration less than the measured 140fs of the compressed supercontinnum can be obtained. AFRIKAANSE OPSOMMING: 'n Ultra-vinnige laser puls kan beskryf word in tyd of frekwensie. As die tyd-bandwydte produk van ‘n ultra-vinnige puls nie bevredig is nie, dan is die puls uitgerek. Hierdie uitrekking kan beskryf word in tyd of frekwensie. In tyd word dit tjirp genoem en in frekwensie groep vertraging dispersie. Verskeie tegnieke kan gebruik word om ‘n laser puls te rek of saam te pers. In hierdie projek is ‘n prisma puls kompressor gebou om uitgerekte pulse saam te pers. ‘n 200nm bre e bandwydte puls (“supercontinuum”) is gegenereer in ‘n fotoniese kristal optiese vesel wat uitsluitlik normale dispersie toon (ANDI-PCF) en die puls is toe saamgepers met behulp van die prisma puls kompressor van‘n oorspronklike 2ps na 140fs. Die eksperiment en fisiese interpretasie wat in hierdie projek aangebied word dui daarop dat ‘n nog korter puls, minder as die gemete 140 fs, verkry kan word deur die bre e bandwydte puls verder saam te pers. 2013-05-15T14:51:42Z 2013-12-13T14:46:58Z 2013-05-15T14:51:42Z 2013-12-13T14:46:58Z 2013-12 Thesis http://hdl.handle.net/10019.1/85576 en_ZA Stellenbosch University ix, 83 p. : ill. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Group delay dispersion Femtosecond lasers Laser pulses, Ultrashort Dissertations -- Physics Theses -- Physics Okoye, Raphael Manipulation of short pulses |
| title | Manipulation of short pulses |
| title_full | Manipulation of short pulses |
| title_fullStr | Manipulation of short pulses |
| title_full_unstemmed | Manipulation of short pulses |
| title_short | Manipulation of short pulses |
| title_sort | manipulation of short pulses |
| topic | Group delay dispersion Femtosecond lasers Laser pulses, Ultrashort Dissertations -- Physics Theses -- Physics |
| url | http://hdl.handle.net/10019.1/85576 |
| work_keys_str_mv | AT okoyeraphael manipulationofshortpulses |