Suppression of third-order intermodulation distortion in analog photonic link based on an integrated polarization division multiplexing Mach–Zehnder modulator

IF 2.5 3区物理与天体物理 Q2 OPTICS Optics Communications Pub Date : 2020-11-15 DOI:10.1016/j.optcom.2020.126253

Ruiqiong Wang , Yongsheng Gao , Wuying Wang , Junchang Zhang , Qinggui Tan , Yangyu Fan

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引用次数: 3

Abstract

A simple and linear analog photonic link (APL) based on a single integrated polarization division multiplexing Mach–Zehnder modulator (PDM-MZM) is proposed with suppressed third-order intermodulation distortion (IMD3). By properly selecting the modulation indexes of radio frequency (RF) signals and bias angles in the two sub-modulators, the electric/optical power ratio is changed and thus two nonlinear distortion signals with opposite phases are constructed to cancel out IMD3 of the link. Therefore, the IMD3 can be suppressed and the spurious-free dynamic range (SFDR) of the system can be improved. Only one electrode in each sub-modulator is used in the experiment. Experimental results show that compared with the conventional link based on a single MZM, 33.7-dB reduction of IMD3 is achieved and an enhancement of 17.6 dB in SFDR can be obtained. Besides, the proposed APL is test by a 16 quadrature amplitude modulation (QAM) RF signal and the error vector magnitude (EVM) and adjacent channel power ratio (ACPR) of the link are measured.

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基于集成极化分复用马赫-曾德尔调制器的模拟光子链路三阶互调失真抑制

提出了一种基于单集成极化分复用马赫-曾德尔调制器(PDM-MZM)的简单线性模拟光子链路(APL)，抑制了三阶互调失真(IMD3)。通过适当选择射频信号的调制指标和两个子调制器中的偏置角，改变电光功率比，从而构建两个相位相反的非线性失真信号来抵消链路的IMD3。因此可以抑制IMD3，提高系统的无杂散动态范围(SFDR)。实验中每个子调制器只使用一个电极。实验结果表明，与基于单个MZM的传统链路相比，IMD3降低了33.7 dB, SFDR增强了17.6 dB。此外，采用16正交调幅(QAM)射频信号对所提出的APL进行了测试，并测量了链路的误差矢量幅度(EVM)和相邻信道功率比(ACPR)。

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.