Measurement of microwave electro-optic coefficient in Sr_(0.61)Ba_(0.39)Nb_2O_6 crystal fiber

摘要

A method is put forward to measure the linear electro-optic (EO) coefficient at high frequency using a light-coupled microwave cavity perturbation method of standing wave condition. The method is used to determine the EO coefficient of Sr_(0.61)Ba_(0.39)Nb_2O_6 (SBN) crystal fiber. The electro-optic coefficient r_(33) of SBN crystal fiber at 10 GHz is measured to be near 200 (pm/V), which is smaller than that measured at low frequency containing secondary contributions. This method is suitable for measuring the electro-optic property in a wide range of high frequencies depending on the availability of microwave cavity and suitable electronics.