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双音调制下星上微波光子系统的交调失真分析

Inter-Modulation Distortion Analysis for On-Board Microwave Photonics System under Dual-Tone Modulation

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摘要

马赫曾德尔调制器的非线性会严重恶化星上微波光子系统的性能。建立了包括光源、马赫曾德尔调制器和光电探测器的双音调制理论模型,利用傅里叶级数展开、傅里叶变换和Gegenbauer加法定理,推导出了调制器非线性失真的严格通用解析解。根据该解析解,可精确地预计不同调制方式下星上微波光子系统的非线性失真,优化系统性能。分析结果表明,双边带和单边带调制条件下,将调制器输出信号保留至二次谐波能较好地近似计算三阶交调失真比和三阶交调截点,三阶交调失真比随调制系数的增大先增大后减小。当调制系数小于1.4674时,单边带调制三阶交调失真比至少比双边带调制小6 dB,适合于星上微波光子系统的应用。

Abstract

The nonlinearity of Mach-Zehnder modulator greatly deteriorates the performance of on-board microwave photonics system. A dual-tone modulation model is presented including optical source, Mach-Zehnder modulator and photodiode, and an exact analytical solution is derived with the method of Fourier expansion, Fourier transform and Gegenbauer addition theory. According to the analytical expression, it can precisely predict the nonlinearity characteristics of the on-board microwave photonics system under different modulation and optimize the system performance. Analytical results indicate that the third-order inter-modulation distortion ratio and the third-order inter-modulation intercept can be approximately calculated with the case when the second-order terms of modulator output signal are included, and the third-order inter-modulation distortion ratio increases and then decreases as the modulation index increases. When the modulation index is less than 1.4674, the third-order inter-modulation distortion ratio of single sideband modulation is at least 6 dB less than that of double sideband modulation and it is suitable for the application of on-board microwave photonics system.

广告组1 - 空间光调制器+DMD
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中图分类号:TN927+.2

DOI:10.3788/aos201232.0706004

所属栏目:光纤光学与光通信

责任编辑:谢婧  信息反馈

基金项目:国家863计划(2007AA01Z294)资助课题。

收稿日期:2012-01-10

修改稿日期:2012-03-16

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作者单位    点击查看

朱子行:空军工程大学电讯工程学院, 陕西 西安 710077
赵尚弘:空军工程大学电讯工程学院, 陕西 西安 710077
幺周石:空间微波技术国防科技重点实验室, 陕西 西安 710000
谭庆贵:空间微波技术国防科技重点实验室, 陕西 西安 710000
李勇军:空军工程大学电讯工程学院, 陕西 西安 710077
楚兴春:空军工程大学电讯工程学院, 陕西 西安 710077
王翔:空军工程大学电讯工程学院, 陕西 西安 710077
赵顾颢:空军工程大学电讯工程学院, 陕西 西安 710077

联系人作者:朱子行(zhuzihang6@126.com)

备注:朱子行(1985—),男,博士研究生,主要从事微波光子学方面的研究。

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引用该论文

Zhu Zihang,Zhao Shanghong,Yao Zhoushi,Tan Qinggui,Li Yongjun,Chu Xingchun,Wang Xiang,Zhao Guhao. Inter-Modulation Distortion Analysis for On-Board Microwave Photonics System under Dual-Tone Modulation[J]. Acta Optica Sinica, 2012, 32(7): 0706004

朱子行,赵尚弘,幺周石,谭庆贵,李勇军,楚兴春,王翔,赵顾颢. 双音调制下星上微波光子系统的交调失真分析[J]. 光学学报, 2012, 32(7): 0706004

被引情况

【1】李轩,赵尚弘,张薇,韩磊,赵静. 双频段信号同步调制下星间微波光子链路性能分析. 激光与光电子学进展, 2013, 50(5): 50601--1

【2】李轩,赵尚弘,朱子行,韩磊,赵静. 星间微波光子链路调制方式的优化. 应用光学, 2013, 34(3): 547-552

【3】李勇军,缪新萍,李 轩,赵尚弘,李瑞欣,刘振霞. 星上微波信号光学调制偏置点优化理论及仿真研究. 红外与激光工程, 2015, 44(8): 2511-2516

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