摘要
We measure the half-wave voltage of LiNbO3 phase modulators in a 26-GHz wideband frequency range, and then analyze it by the phase modulation photonic peak gain linked to the interferometric demodu- lation. The optical interferometer is constructed with two 50：50 couplers and two fiber arms with a l-m difference in fiber length. The photonic link gain peaks are frequency dependent, as indicated by the differential time delay in the interferometer. The procedure described is a new and practical half-wave voltage measurement method that can accurately predict the nonlinear frequency characteristics of the phase modulator. Moreover, the method can be applied to various types of LiNbO3 phase modulators.
We measure the half-wave voltage of LiNbO3 phase modulators in a 26-GHz wideband frequency range, and then analyze it by the phase modulation photonic peak gain linked to the interferometric demodu- lation. The optical interferometer is constructed with two 50：50 couplers and two fiber arms with a l-m difference in fiber length. The photonic link gain peaks are frequency dependent, as indicated by the differential time delay in the interferometer. The procedure described is a new and practical half-wave voltage measurement method that can accurately predict the nonlinear frequency characteristics of the phase modulator. Moreover, the method can be applied to various types of LiNbO3 phase modulators.
基金
supported by the Chinese Defense Advance Research Program of Science and Technology,China under Grant No.6906005003
