Overcoming OBI Problem by Means of Heterodyne Detection in Upstream Transmission of WDM/SCM-PON 


Vol. 35,  No. 2, pp. 202-208, Feb.  2010


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  Abstract

The performance of upstream transmission in SCM-PON is generally limited by the presence of OBI which is caused by the beating of two or more lasers. In this paper, we propose a novel approach for reducing OBI problem by using heterodyne detection with an additional LD as a local oscillator, resulting that the RF signal is shifted to the other spectal band. In addition, it is possible that the proposed method can provide the cost-effective solution thanks to the loop-back mechanism using R-SOA in ONUs. The performance is superior when the spectral width of LD is smaller and the power difference between the transmission LD and the oscillation LD is bigger. System configuration and design consideration are discussed. Performance of the systems is evaluated by simulator called OptSim. It is expected to provide WDM/SCM-PON system not only cost-effective but also efficient in increasing the number of subscribers.

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  Cite this article

[IEEE Style]

Y. Jeon, H. Shin, J. Park, "Overcoming OBI Problem by Means of Heterodyne Detection in Upstream Transmission of WDM/SCM-PON," The Journal of Korean Institute of Communications and Information Sciences, vol. 35, no. 2, pp. 202-208, 2010. DOI: .

[ACM Style]

Youchan Jeon, Hongseok Shin, and Jinwoo Park. 2010. Overcoming OBI Problem by Means of Heterodyne Detection in Upstream Transmission of WDM/SCM-PON. The Journal of Korean Institute of Communications and Information Sciences, 35, 2, (2010), 202-208. DOI: .

[KICS Style]

Youchan Jeon, Hongseok Shin, Jinwoo Park, "Overcoming OBI Problem by Means of Heterodyne Detection in Upstream Transmission of WDM/SCM-PON," The Journal of Korean Institute of Communications and Information Sciences, vol. 35, no. 2, pp. 202-208, 2. 2010.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880