激光与光电子学进展, 2018, 55 (7): 070701, 网络出版: 2018-07-20   

基于并联马赫-曾德尔调制器的锯齿波生成方法 下载: 623次

Sawtooth Waveform Generation Based on Two Parallel Mach-Zehnder Modulators
作者单位
1 上海卫星工程研究所, 上海 200240
2 上海航天技术研究院北京研发中心, 北京 100081
摘要
介绍了基于微波光子技术的射频锯齿波产生技术的应用背景和技术类型。为克服电子波形生成办法的电子瓶颈,以外调制方法作为技术基础,提出了一种基于并联马赫-曾德尔调制器(MZM)的锯齿波生成的新方法。调整MZM直流偏置电压和射频信号幅度,以满足正交偏置点和调制系数的要求,保证经光电平衡二极管后生成的光电流各频率分量特性符合锯齿波函数分解的傅里叶级数。建立了数学仿真模型,进行了实验验证。引入方均根误差对结果进行衡量,并分析了消光比和电压漂流对输出信号性能的影响。结果表明,所提方案灵活,具有优秀的可扩展性,通过简单操作即可完成波形生成和正负斜率切换。
Abstract
The application background and techniques to generate sawtooth wave based on photonic approaches are introduced. To overcome the electronic bottleneck of electronic waveform generation methods, we propose a novel method to generate sawtooth waveforms by using two parallel Mach-Zehnder modulators (MZMs) based on external modulation. We adjust the voltage of the direct current source and the intensity of the radio frequency source in order to make MZMs to operate under conditions of quadrature transmission point (QTP) and proper modulation index. Thus, the frequency components′characteristics of the photocurrent from optoelectronic balance diode are coincident with the Fourier series of sawtooth. A mathematical model is built, and the scheme is verified experimentally. The root mean square error is used to evaluate the simulated and experimental results. In addition. The influences of the extinction ratio and the drift voltage on the output signal are analyzed. The results show that the proposed system is flexible and has strong scalability. The waveform generation and slope switching can be realized through simple actions.

袁牧野, 刘波, 王天亮, 徐志康. 基于并联马赫-曾德尔调制器的锯齿波生成方法[J]. 激光与光电子学进展, 2018, 55(7): 070701. Yuan Muye, Liu Bo, Wang Tianliang, Xu Zhikang. Sawtooth Waveform Generation Based on Two Parallel Mach-Zehnder Modulators[J]. Laser & Optoelectronics Progress, 2018, 55(7): 070701.

本文已被 4 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!