Frequency Response Enhancement of Photonic Sampling Based on Cavity-Less Ultra-Short Optical Pulse Source

Zhengkai Li; Yangxue Ma; Ying Xu; Yutong He; Weiqiang Lyu; Zhenwei Fu; Zhiyao Zhang; Shangjian Zhang; Heping Li; Yong Liu

doi:10.1109/JPHOT.2022.3162667

IEEE Photonics Journal (Jan 2022)

Frequency Response Enhancement of Photonic Sampling Based on Cavity-Less Ultra-Short Optical Pulse Source

Zhengkai Li,
Yangxue Ma,
Ying Xu,
Yutong He,
Weiqiang Lyu,
Zhenwei Fu,
Zhiyao Zhang,
Shangjian Zhang,
Heping Li,
Yong Liu

Affiliations

Zhengkai Li: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
Yangxue Ma: ORCiD; Beijing Institute of Radio Measurement, Beijing, China
Ying Xu: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
Yutong He: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
Weiqiang Lyu: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
Zhenwei Fu: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
Zhiyao Zhang: ORCiD; State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
Shangjian Zhang: ORCiD; State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
Heping Li: ORCiD; State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
Yong Liu: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, China

DOI: https://doi.org/10.1109/JPHOT.2022.3162667
Journal volume & issue: Vol. 14, no. 3
pp. 1 – 8

Abstract

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The influence of the residual pulse chirp and the spectrum shape from a cavity-less optical pulse source on the sampling performance is theoretically analyzed. According to the theoretical analysis, an optimization method for enlarging the operation bandwidth of a photonic sampling system based on a cavity-less ultra-short pulse source is proposed and experimentally demonstrated. Through biasing the Mach-Zehnder modulator in the cavity-less optical pulse source below its quadrature point, the output spectrum flatness can be greatly improved, which is beneficial for optimizing the photonic sampling frequency response introduced by the ultrashort optical pulse train. In the experiment, the 3-dB bandwidth of the photonic sampling frequency response is increased from less than 10 GHz to more than 35 GHz by using the proposed method without sacrificing the output signal-to-noise ratio.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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