Self-calibrated electrical spectrum measurement of optical frequency comb based on segmental electro-optic up-conversion

Mengke Wang; Yutong He; Ying Xu; Zhao Liu; Yali Zhang; Zhiyao Zhang; Shangjian Zhang; Yong Liu

doi:10.1117/12.2601276

9 October 2021 Self-calibrated electrical spectrum measurement of optical frequency comb based on segmental electro-optic up-conversion

Mengke Wang, Yutong He, Ying Xu, Zhao Liu, Yali Zhang, Zhiyao Zhang, Shangjian Zhang, Yong Liu

Author Affiliations +

Proceedings Volume 11891, Semiconductor Lasers and Applications XI; 118910K (2021) https://doi.org/10.1117/12.2601276
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Abstract

A self-calibrated method is proposed for electrical spectrum measurement of optical frequency comb (OFC) based on segmental electro-optic up-conversion. In the method, every N comb teeth of OFC are divided into one segment in the frequency domain, and M segments are investigated with the measuring frequency range of M×N×fr (fr is the repetition frequency of the OFC). Through symmetric frequency modulation, intra-segment measurement and seamless stitching between different segments are performed. Finally, only a low-frequency microwave source is required to achieve the electrical spectrum measurement of OFC within ultra-wideband frequency range, and the measuring frequency range can be 2M-fold expanded with respect to the modulation frequency rang. Meanwhile, the frequency responses of MachZehnder modulator and photodetector are fully cancelled out, realizing the self-calibrated electrical spectrum measurement of OFC within ultra-wideband frequency range.

Citation Download Citation

Mengke Wang, Yutong He, Ying Xu, Zhao Liu, Yali Zhang, Zhiyao Zhang, Shangjian Zhang, and Yong Liu "Self-calibrated electrical spectrum measurement of optical frequency comb based on segmental electro-optic up-conversion", Proc. SPIE 11891, Semiconductor Lasers and Applications XI, 118910K (9 October 2021); https://doi.org/10.1117/12.2601276

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KEYWORDS

Modulation

Calibration

Electro optics

Frequency combs

Optical testing

Microwave radiation

Teeth

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