Wide-band electrooptic intensity modulator frequency response measurement using an optical heterodyne down-conversion technique
Wide-band electrooptic intensity modulator frequency response measurement using an optical heterodyne down-conversion technique
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DOI：
10.1109/tmtt.2005.860303
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发表时间：
2006-01
影响因子：
4.3
通讯作者：
A.K.M. Lam;M. Fairburn;N. Jaeger
中科院分区：
文献类型：
--
作者：
A.K.M. Lam;M. Fairburn;N. Jaeger
本文描述了一种用于测量毫米波频率电光强度调制器频率响应的新型系统。系统测量|S21|以电分贝为单位。其中，调制器的电输入信号是通过外差两个可调谐激光器产生的。然后将调制器的输出下变频至易于测量输出的微波频率。使用 55 GHz 光电二极管作为两个激光器的混频器进行了高达 78 GHz 的测量。此外，我们的系统还跟踪激光器输出的任何频率变化。如果调制器在非线性区域运行，我们的系统还可以测量调制器的线性响应，因为它可以抑制调制器中产生的由于非线性而产生的高阶谐波
This paper describes a novel system for measuring the frequency response of electrooptic intensity modulators at millimeter-wave frequencies. The system measures |S21| in decibels electrical. In it, the electrical input signal to the modulator is generated by heterodyning two tunable lasers. The output of the modulator is then down-converted to a microwave frequency at which the output is easily measured. Measurements have been made up to 78 GHz using a 55-GHz photodiode as the mixer for the two lasers. In addition, our system tracks any frequency variations in the outputs of the lasers. Our system can also measure the linear response of the modulator if it is operated in nonlinear regions since it can reject higher order harmonics, due to nonlinearities, generated in the modulator