Self-referenced electrical method for measuring frequency response of high-speed Mach-Zehnder modulators based on two-tone modulation

Heng Wang; Shangjian Zhang; Xinhai Zou; Yali Zhang; Yong Liu

doi:10.1117/12.2247663

9 November 2016 Self-referenced electrical method for measuring frequency response of high-speed Mach-Zehnder modulators based on two-tone modulation

Heng Wang, Shangjian Zhang, Xinhai Zou, Yali Zhang, Yong Liu

Author Affiliations +

Proceedings Volume 10017, Semiconductor Lasers and Applications VII; 100170X (2016) https://doi.org/10.1117/12.2247663
Event: SPIE/COS Photonics Asia, 2016, Beijing, China

Abstract

We demonstrated a self-referenced electrical method for measuring frequency response of high-speed Mach-Zehnder modulators (MZMs) based on two-tone modulation. The modulation index and half-wave voltage can be extracted from the heterodyne ratio of two desired components by properly adjusting bias voltage. The method achieves the electrical domain measurement of the frequency-dependent modulation indices and frequency-dependent half-wave voltages of MZMs without any extra calibration for the responsivity fluctuation in the photodetection. Moreover, it reduces half bandwidth requirements of photodetector and electrical spectrum analyzer by carefully choosing a half frequency relationship of two-tone microwave signals. The consistency between our method and the optical spectrum analysis method verifies the simple but accurate measurement.

Citation Download Citation

Heng Wang, Shangjian Zhang, Xinhai Zou, Yali Zhang, and Yong Liu "Self-referenced electrical method for measuring frequency response of high-speed Mach-Zehnder modulators based on two-tone modulation", Proc. SPIE 10017, Semiconductor Lasers and Applications VII, 100170X (9 November 2016); https://doi.org/10.1117/12.2247663

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KEYWORDS

Modulation

Modulators

Microwave radiation

Spectrum analysis

Photodetectors

Heterodyning

Signal detection

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