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Self-calibrating measurement of high-speed electro-optic phase modulators based on two-tone modulation

机译：基于双音调制的高速电光相位调制器的自校准测量

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摘要

We propose a self-calibrating method for high-frequency response measurement of electro-optic phase modulators based on two-tone modulation. The method utilizes the electrical domain measurement of heterodyning spectrum between the two-tone modulation optical signal and the frequency-shifted optical carrier, and eliminates the need to correct the responsivity fluctuation in the photodetection. High-frequency modulation depth and half-wave voltages are measured and compared to those with the traditional optical spectrum analysis method in the experimental demonstration. The proposed method enables calibration-free and accurate frequency response measurement of electro-optic phase modulators by using high-resolution electrical spectrum analysis.
机译：我们提出了一种基于双音调制的电光相位调制器高频响应测量的自校准方法。该方法利用了双音调制光信号和频移光载波之间的外差光谱的电域测量，并且不需要校正光电检测中的响应度波动。测量了高频调制深度和半波电压，并与实验演示中的传统光谱分析方法进行了比较。通过使用高分辨率电频谱分析，所提出的方法可以实现电光相位调制器的无标定和准确的频率响应测量。

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