Browsing by Author "Du Plessis, Johann Altenburg"
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- ItemSpectral characteristics of stimulated Raman scattered radiation in a waveguide(Stellenbosch : Stellenbosch University, 1992-01) Du Plessis, Johann Altenburg; Rohwer, Erich G.; Stellenbosch University. Faculty of Science. Dept. of Physics.ENGLISH ABSTRACT: The spectral characteristics of stimulated Raman scattered radiation in a waveguide was investigated using a laser as source of pump radiation. The pump laser is focused into the waveguide to obtain a high intensity region necessary to enhance the Raman effect. The propagation of laser radiation through a medium was investigated as well as the coupling of the laser to the waveguide. A model which describes the transmission of laser radiation through the waveguide was derived and the parameters which influences the transmission were identified. The theory of the Raman scattering process was studied and the parameters which influence the gain factor for the process, were investigated. The influence of these parameters on the gain were experimentally determined and comparison was made with theoretical predictions. Various Stokes and Anti-Stokes orders with hydrogen as the Raman medium were measured and identified. Further studies were proposed involving the use of an interferometer to measure the spectral line profiles.