单载波频域均衡技术在无线通信中是极为成熟且研究广泛的信道均衡及补偿技术,该技术采用高速数字信号处理将电信号从时域变换到频域进行均衡补偿。在光纤通信系统中,提出采用单载波频域均衡技术对接收信号进行电域色散补偿,在10 Gb/s的单边带幅移键控(ASK)调制光信号经过50,80和100 km普通单模光纤传输之后,验证了频域均衡对色散补偿的效果。其中单边带ASK调制光信号基于有限冲击响应希尔伯特变换,利用一个双臂马赫曾德尔(MZ)调制器级联一个相位调制器来产生。结果证明,频域均衡模型能有效提高眼图开启度和降低时钟抖动,随着传输距离的增加,改善效果更加显著。最后在分析系统均衡和补偿效果参数的基础上,得出了实现最佳频域均衡效果的单边带调制点。

Single-carrier frequency domain equalization (SC-FDE),as a mature technique in wireless commutation,is widely researched for signal equalization and compensation utilizing high speed electronic devices such as digital signal processor,A SC-FDE technique in optical communication system for received signal dispersion compensation is proposed and demonstrated. After 50 km,80 km,100km transmission for a 10 Gb/s amplitude shift keying (ASK) single sideband (SSB) signal on a single mode fiber,the dispersion of optical signal is effectively compensated by adopting SC-FDE technique. The SSB signal is generated by a dual-arm Mach-Zehnder modulator cascading a phase modulator based on Hilbert finite impulse response digital filter. The results demonstrate that the eye opening and the clock recovery is improved,and the effect of compensation is enhanced as the transmission distance increases in proposed SC-FDE model. At last,the SSB modulation location for achieving the best SC-FDE effect is also obtained.