Current excitation model for Cerenkov lasers with a planar waveguide (レーザ・量子エレクトロニクス)

概要

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A unified theoretical analysis on the spontaneous and the stimulated emissions in Cerenkov free electron lasers (CFELs) with a planar dielectric waveguide is shown. The excitation of the electromagnetic (EM) wave is formulated with current sources of the electron beam. A non-relativistic classical analysis is applied to this model, where the electron is represented as a spatially localized particle. The spontaneous emission is evaluated through spatially varying field components associated with the motion of an electron. The stimulated emission is derived basing on the modulations concept of electrons velocity and density by the EM field. Interacting regimes by the stimulated emission are classified into transit and steady states with the time variation. The effect of the electron relaxation is introduced to explain the operation at the steady state. Compatibility of this analysis with the already given analyses is also confirmed.
社団法人電子情報通信学会の論文
2010-05-21