Spectral Analyses Of Electrooptic Modulation

Based upon the spectral expansions of output intensity and amplitude of light of electro-optic modulation (EON), the mode of EOM is studied for both external and internal modulations. The normalized harmonic distortions are introduced, and the conditions under which E0M, can be approximated to amplitude modulation (.00 or intensity modulation (IM) are obtained at different dc biases. The harmonic components of output light intensity and amplitude of intra-cavity EOM are numerically caculated for the first time. And the modulation index versus dc bias is obtained. The experiments of CO 2 EOM using a CdTe crystal shower an agreement with the taeory.