Spectral characteristics of stimulated Raman scattered radiation in a waveguide

[摘要] ENGLISH ABSTRACT: The spectral characteristics of stimulated Raman scattered radiation in a waveguide was investigatedusing a laser as source of pump radiation.The pump laser is focused into the waveguide to obtain a high intensity region necessary to enhancethe Raman effect. The propagation of laser radiation through a medium was investigatedas well as the coupling of the laser to the waveguide. A model which describes the transmissionof laser radiation through the waveguide was derived and the parameters which influences thetransmission were identified.The theory of the Raman scattering process was studied and the parameters which influencethe gain factor for the process, were investigated. The influence of these parameters on the gainwere experimentally determined and comparison was made with theoretical predictions.Various Stokes and Anti-Stokes orders with hydrogen as the Raman medium were measuredand identified. Further studies were proposed involving the use of an interferometer to measurethe spectral line profiles.

[发布机构] Stellenbosch University