Zhong Kangping, Zhou Xian, Gui Tao, Tao Li, Gao Yuliang, Chen Wei, Man Jiangwei, Zeng Li, Lau Alan Pak Tao, Lu Chao
Opt Express. 2015 Jan 26;23(2):1176-89. doi: 10.1364/OE.23.001176.
Advanced modulation formats combined with digital signal processing and direct detection is a promising way to realize high capacity, low cost and power efficient short reach optical transmission system. In this paper, we present a detailed investigation on the performance of three advanced modulation formats for 100 Gb/s short reach transmission system. They are PAM-4, CAP-16 and DMT. The detailed digital signal processing required for each modulation format is presented. Comprehensive simulations are carried out to evaluate the performance of each modulation format in terms of received optical power, transmitter bandwidth, relative intensity noise and thermal noise. The performance of each modulation format is also experimentally studied. To the best of our knowledge, we report the first demonstration of a 112 Gb/s transmission over 10km of SSMF employing single band CAP-16 with EML. Finally, a comparison of computational complexity of DSP for the three formats is presented.
先进调制格式与数字信号处理及直接检测相结合，是实现高容量、低成本且高能效短距离光传输系统的一种很有前景的方式。在本文中，我们对用于100 Gb/s短距离传输系统的三种先进调制格式的性能进行了详细研究。它们是4电平脉冲幅度调制（PAM-4）、16状态无载波幅度相位调制（CAP-16）和离散多音调制（DMT）。文中给出了每种调制格式所需的详细数字信号处理过程。进行了全面的仿真，以根据接收光功率、发射机带宽、相对强度噪声和热噪声来评估每种调制格式的性能。还对每种调制格式的性能进行了实验研究。据我们所知，我们首次展示了采用带有电吸收调制激光器（EML）的单波段CAP-16在10公里标准单模光纤（SSMF）上实现112 Gb/s的传输。最后，给出了三种格式数字信号处理（DSP）的计算复杂度比较。
