Print Email Facebook Twitter Supercontinuum generation via in-situ femtosecond-laser-induced filamentation for ultrabroadband femtosecond/picosecond coherent Raman spectroscopy Title Supercontinuum generation via in-situ femtosecond-laser-induced filamentation for ultrabroadband femtosecond/picosecond coherent Raman spectroscopy: MSc Thesis Author Stutvoet, Aert (TU Delft Aerospace Engineering) Contributor Mazza, F. (mentor) Bohlin, G.A. (mentor) Degree granting institution Delft University of Technology Programme Aerospace Engineering Date 2021-11-19 Abstract For thermometry and concentration measurements in the gas-phase two-beam hybrid femtosecond/picosecond (fs/ps) coherent Raman spectroscopy (CRS) is the benchmark. To acquire additional information on major combustion species like for example carbon dioxide, oxygen and molecular hydrogen a supercontinuum is required. In this work in-situ femtosecond-laser-induced filamentation is proposed. This is a non-linear optical process where the pulse self-focusses. Through self-phase modulation and non-linear dispersion in the plasma medium a supercontinuum is created. In-situ generation of the supercontinuum allows for a great simplification of the experimental setup as no additional chirped mirrors are required to deliver a near-transform-limited ultrabroadband pulse to the probe volume. The work presents an experimental campaign split into three phases to characterise the filamentation process, the probe volume dimensions, and the effects of the filamentation process on thermometry. To reference this document use: http://resolver.tudelft.nl/uuid:d56ba53a-0deb-4929-985c-f4909f96d455 Embargo date 2021-11-20 Part of collection Student theses Document type master thesis Rights © 2021 Aert Stutvoet Files PDF Thesis_Aert_Stutvoet_4481429.pdf 17.37 MB Close viewer /islandora/object/uuid:d56ba53a-0deb-4929-985c-f4909f96d455/datastream/OBJ/view