The effects of the position of dispersion compensation fiber on 4 $MUL 10Gb/s WDM systems with different duty cycle are investigated. With the long amplifier spacing and large input power, no matter what the duty cycle is, the performance of the system with DCF-first is worse than that with SMF-first. The best performance can be obtained with duty cycle of 0.5, and it is independent of the position of DCF. With the short amplifier spacing and small input power, the system performance with NRZ format and DCF-first is better than that of other systems. It means that NRZ format and DCF-first should be employed in WDM system with short amplifier spacing.
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机译：调查了色散补偿光纤位置对具有不同占空比的4 $ MUL 10GB / S WDM系统的影响。随着长放大器间距和大量输入功率，无论占空比是什么，DCF-First系统的性能比SMF-First更糟糕。可以在占空比0.5的占空比获得最佳性能，并且与DCF的位置无关。通过短放大器间距和小输入功率，使用NRZ格式和DCF-First的系统性能优于其他系统。这意味着NRZ格式和DCF-First应在具有短放大器间距的WDM系统中使用。
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