中国激光, 2017, 44 (12): 1206001, 网络出版: 2017-12-11
基于互补型双MZM结构的光子时间拉伸模数转换器系统
Photonic Time-Stretched Analog-to-Digital Converter System Based on Complementary Dual Mach-Zehnder Modulator Structure
光通信 模数转换器 光子时间拉伸 互补调制 二阶谐波 optical communications analog-to-digital converter photonic time stretch complementary modulation second-order harmonic
摘要
研究了互补型双马赫-曾德尔调制器(MZM)结构对光子时间拉伸模数转换器(PTS-ADC)的性能影响。通过理论推导验证了互补型双MZM抑制PTS-ADC中二阶谐波产生的原理。设计了一种基于互补型双MZM的PTS-ADC系统, 利用Optisystem软件进行仿真研究, 分别对5组不同的输入射频(RF)信号进行模数转换(10, 15, 20, 25, 30 GHz), 对比互补型双MZM和单输出MZM作为电光调制器时, 各系统对RF信号采样恢复的频率值。仿真结果表明, 互补型双MZM结构可以有效抑制二阶谐波, 提高了PTS-ADC的量化精度。
Abstract
The effect of complementary dual Mach-Zehnder modulators (MZM) structure on photonic time-stretched analog-to-digital converter (PTS-ADC) is studied. The principle that the complementary dual Mach-Zehnder modulators suppress second-order harmonic generation in PTS-ADC is theoretically proved. The PTS-ADC based on dual Mach-Zehnder modulators is designed and simulated in the Optisystem software. The recovery radio-frequency (RF) signal frequency values of PTS-ADC are simulated and compared between dual Mach-Zehnder modulators and single output Mach-Zehnder modulator as electro-optical modulator under the condition of five different input RF signals (10, 15, 20, 25, 30 GHz). The simulation results show that dual Mach-Zehnder modulators can effectively suppress the generation of second-order harmonics and improve the quantization resolution.
王俊达, 陈颖, 陈向宁. 基于互补型双MZM结构的光子时间拉伸模数转换器系统[J]. 中国激光, 2017, 44(12): 1206001. Wang Junda, Chen Ying, Chen Xiangning. Photonic Time-Stretched Analog-to-Digital Converter System Based on Complementary Dual Mach-Zehnder Modulator Structure[J]. Chinese Journal of Lasers, 2017, 44(12): 1206001.