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http://dx.doi.org/10.5515/KJKIEES.2009.20.1.067

Investigation of Performance Limitations of SCM/WDM Systems Using Optical DSB Modulation and 16 QAM Signals  

Kim, Kyoung-Soo (Department of Computer and Radio Communications Engineering, Korea University)
Lee, Jae-Hoon (Department of Computer and Radio Communications Engineering, Korea University)
Jeong, Ji-Chai (Department of Computer and Radio Communications Engineering, Korea University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.20, no.1, 2009 , pp. 67-74 More about this Journal
Abstract
In this paper, we investigate the performance limitations of SubCarrier Multiplexed(SCM) WDM systems using optical Double-Side Band(DSB) modulated 16 QAM signals. The Bit-Error Rate(BER) performance is evaluated under various optical transmission links including the effects of the dispersion and fiber nonlinearities such as SPM(Self-Phase Modulation) and XPM(cross-phase modulation). After simulation of SCM-WDM systems, the dominant factors determining the entire system performance are appeared to be the nonlinearity of MZ(Mach-Zehnder) modulator and the SCM channel spacing. The BER performance of subcarrier channels in the higher frequencies was degraded with the large dispersion effect only, however, the performance was improved a little with a combined effect of fiber dispersion and nonlinear effect when the hish fiber launching power was applied.
Keywords
Optical DSB; QAM; Sub-Carrier Multiplexing; WDM;
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