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100-km Long-Reach WDM-PON Using High Power Efficient On-Off Keying Codes in Downstream
Wang Yanhong #,Zhang Min *
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876
*Correspondence author
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Funding: The research was supported by Ministry of Education Doctoral Program Foundation（No.No.20090005110013）
Opened online:12 September 2012
Accepted by: none
Citation: Wang Yanhong,Zhang Min.100-km Long-Reach WDM-PON Using High Power Efficient On-Off Keying Codes in Downstream[OL]. [12 September 2012] http://en.paper.edu.cn/en_releasepaper/content/4488293
 
 
In long-reach RSOA based WDM-PON, the upstream transmission is impacted by the unavoidable Rayleigh backscattering because the downstram and upstream links share the same wavelength. To fix the impairment, a viable option is to separate the signal frequency spectrums of downstream and upstream. In this paper, a scheme of 100-km WDM-PON with 10Gbit/s high power efficient coded downstream signals and 2.5Gbit/s NRZ upstream signal is proposed and simulated. The performances of downstream and upstream are compared respectively when NRZ, RZ, IRZ or PPM code is used in downstream. And the relationship between the receive sensitivity of downstream/upstream and the extinction ratio of downstream signal is discussed definitively.
Keywords:Fiber optics communications; WDM-PON; Modulation; Rayleigh backscattering
 
 
 

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