An alternative phase modulator half-wave voltage measurement based on photonic link

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2013,（7）
• 页码范围: 40-42
• 页数: 3页
• 语种: 英文
• DOI: 10.3788/COL201311.071202

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 demodulation.The optical interferometer is constructed with two 50∶50 couplers and two fiber arms with a 1-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.