Optical PAM-4 signal generation using a silicon Mach-Zehnder optical modulator.
Optical PAM-4 signal generation using a silicon Mach-Zehnder optical modulator.
复制标题
DOI：
10.1364/oe.25.023003
复制
发表时间：
2017-09
期刊：
影响因子：
3.8
通讯作者：
Sizhu Shao;J. Ding;Lingchen Zheng;K. Zou;Lei Zhang;Fan Zhang;Lin Yang
中科院分区：
文献类型：
--
作者：
Sizhu Shao;J. Ding;Lingchen Zheng;K. Zou;Lei Zhang;Fan Zhang;Lin Yang
提出了一种研究硅马赫-曾德尔光调制器线性特性的解析模型。根据模拟结果，我们对硅脊形波导的宽度和PN结的位置进行了优化，以提高线性度。所制作的硅马赫-曾德尔光调制器的三阶互调失真和二阶谐波失真的无杂散动态范围分别为113.3 dB. Hz 2/3和88.9 dB. Hz 1/2。我们还演示了光四电平脉冲幅度调制（PAM-4）信号的产生通过该设备。所产生的光PAM-4信号的特征在于高达35 Gbaud的速率。光PAM-4信号在20 Gbaud和32 Gbaud时的误码率分别达到5.2 <$10 -6和6.6 <$10 -5，远低于硬判决前向纠错的门限（3.8 <$10 -3）。
An analytic model is proposed to study the linearity performance of the silicon Mach-Zehnder optical modulator. According to the simulation results, we optimize the width of the silicon rib waveguide and the location of the PN junction to improve the linearity performance. The fabricated silicon Mach-Zehnder optical modulator has a spurious free dynamic range of 113.3 dB.Hz2/3 and 88.9 dB.Hz1/2 for the third-order intermodulation distortion and the second-order harmonic distortion. We also demonstrate the optical four-level pulse-amplitude-modulation (PAM-4) signal generation through the device. The generated optical PAM-4 signal is characterized at the rates up to 35 Gbaud. The BERs of the optical PAM-4 signals can reach 5.2╳10-6 at 20 Gbaud and 6.6╳10-5 at 32 Gbaud, which are much lower than the threshold of hard decision forward error correction (3.8 ╳10-3).