Wide sideband generation by quasi-velocity-matched electro-optic modulator using periodic domain inversion

摘要

Abstract: In the report, we explain how the quasi-velocity-matched electrooptic (EO) modulator using domain inversion can generate extreme wide sideband. The quasi-matching between the phase velocity of microwave and the group velocity of light was established by using periodic domain inversion of an EO crystal LiTaO$-3$/ at a frequency of 9.35 GHz. Long effective interaction length was also obtained at such a high modulation frequency. As a result, we obtained modulation index 22.5 rad and extended the sidebands up to 420 GHz.!5