Optical time division multiplexing - wavelength division multiplexing (OTDM-WDM), intensity modulation (IM) systems employing optical amplification and dispersion management (DM) are analyzed with and without the introduction of an optical narrowband bandpass filter placed right after optical time demultiplexing. The use of the filter was found to improve the performance of the demultiplexed channels by reducing amplitude jitter while possessing high intersymbol interference (ISI) tolerance. The OTDM-WDM link shows good performance up to 2000 km with the OTDM filter providing a Q gain of 0.7-1.1 dB. The optimal input power reduces for longer distances due to increased significance of nonlinear effects. A 900 km link showed good performance for spectral efficiencies as low as 0.52 bits/s/Hz, though the Q gain provided by the OTDM filter reduces as channel spacing decreases.
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机译：在采用和不采用在光学时间多路分解之后放置光学窄带带通滤波器的情况下，对采用光学放大和色散管理（DM）的光学时分复用-波分复用（OTDM-WDM），强度调制（IM）系统进行了分析。发现使用滤波器可以通过降低幅度抖动来提高解复用通道的性能，同时具有较高的符号间干扰（ISI）容限。 OTDM-WDM链路在长达2000 km的情况下表现出良好的性能，而OTDM滤波器可提供0.7-1.1 dB的Q增益。由于非线性效应的重要性增加，因此最佳输入功率会在更长的距离内减小。一条900 km的链路在频谱效率低至0.52 bit / s / Hz时表现出良好的性能，尽管OTDM滤波器提供的Q增益随着信道间隔的减小而减小。
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