Wei J L, Yang X L, Giddings R P, Tang J M
School of Electronic Engineering, Bangor University, Dean street, Bangor, LL57 1UT, UK.
Opt Express. 2009 May 25;17(11):9012-27. doi: 10.1364/oe.17.009012.
The wavelength dependent transmission performance of adaptively modulated optical OFDM (AMOOFDM) signals is investigated, for the first time, over optical amplification- and chromatic dispersion compensation-free IMDD SMF systems using semiconductor optical amplifiers (SOAs) as intensity modulators. A theoretical SOA model describing both optical gain saturation and gain spectral dynamics is developed, based on which optimum SOA operating conditions are identified for various wavelengths varying in a broad range of 1510 nm- 1590 nm. Results show that, SOA intensity modulators operating at the identified optimum conditions enable the realization of colourless AMOOFDM transmitters within the aforementioned wavelength window. Such transmitters are capable of supporting >30 Gb/s signal transmission over 60 km SMFs.
首次研究了在使用半导体光放大器（SOA）作为强度调制器的无光放大和无色散补偿的强度调制直接检测单模光纤（IMDD SMF）系统上，自适应调制光正交频分复用（AMOOFDM）信号的波长相关传输性能。开发了一种描述光增益饱和和增益光谱动态的理论SOA模型，在此基础上确定了在1510nm至1590nm宽范围内变化的各种波长的最佳SOA工作条件。结果表明，在确定的最佳条件下工作的SOA强度调制器能够在上述波长窗口内实现无色AMOOFDM发射机。这种发射机能够在60km的单模光纤上支持>30Gb/s的信号传输。
