상세정보
학술지
Effects of Upstream Incoherent Crosstalk Caused by ASE Noise from Tx-Disabled ONUs in XG-PONs and TWDM-PONs
- 발행일
- 201602
- 출처
- ETRI Journal, v.38 no.1, pp.1-8
- ISSN
- 1225-6463
- 출판사
- 한국전자통신연구원 (ETRI)
- 협약과제
- 14MI9300, (통합)대용량 WDM 액세스망핵심 및 선행기술개발, 이상수
- 초록
- A large incoherent crosstalk (IC) caused by amplified spontaneous emission (ASE) noise power from Txdisabled 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 TWDMPON 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.
- KSP 제안 키워드
- Amplified spontaneous emission (ASE) noise, Filtering method, ITU-T, Noise power, Optical filtering, Optical line terminal(OLT), Optical network unit(ONU), Passive optical network, Path loss, Relative intensity noise, TWDM-PON