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http://dx.doi.org/10.4218/etrij.16.0115.0099

Effects of Upstream Incoherent Crosstalk Caused by ASE Noise from Tx-Disabled ONUs in XG-PONs and TWDM-PONs  

Lee, Han Hyub (Communications & Internet Research Laboratory, ETRI)
Rhy, Hee Yeal (Strategy Team, Ericsson-LG)
Lee, Sangsoo (Communications & Internet Research Laboratory, ETRI)
Lee, Jong Hyun (Communications & Internet Research Laboratory, ETRI)
Chung, Hwan Seok (Communications & Internet Research Laboratory, ETRI)
Publication Information
ETRI Journal / v.38, no.1, 2016 , pp. 1-8 More about this Journal
Abstract
A large incoherent crosstalk (IC) caused by amplified spontaneous emission (ASE) noise power from Tx-disabled optical network units and a differential path loss has been shown to degrade upstream transmission performance in time-division multiplexing passive optical networks. This paper considers the IC-induced power penalty of an upstream signal both in an XG-PON and in a TWDM-PON. We investigate the degradation of the extinction ratio and relative intensity noise through a simulation and experiments. For the XG-PON case, we observe a 9.6 dB difference in the level of ASE noise power from Tx-disabled ONUs (hereafter known simply as ASE noise) between our result and the ITU-T XG-PON PMD recommendation. We propose an optical filtering method to mitigate an IC-induced power penalty. In the TWDM-PON case, the IC-induced power penalty is naturally negligible because the ASE noise is filtered by a wavelength multiplexer at the optical line terminal. The results provide design guidelines for the level of ASE noise in both XG-PONs and TWDM-PONs.
Keywords
TWDM-PON; XG-PON; ASE; crosstalk; ONU;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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