DOI QR코드

DOI QR Code

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

  • Received : 2015.02.03
  • Accepted : 2015.10.07
  • Published : 2016.02.01

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

References

  1. ITU-T Rec. G.989.1, "40-Gigabit-Capable Passive Optical Networks (NG-PON2): General Requirements," 2013.
  2. ITU-T Rec. G.989.2, "40-Gigabit-Capable Passive Optical Networks 2 (NG-PON2): Physical Media Dependent (PMD) Layer Specification," 2014.
  3. ITU-T Rec. G.989.3, "40-Gigabit-Capable Passive Optical Networks 2 (NG-PON2): Transmission Convergence (TC) Layer Specification, Under Study," 2015.
  4. D. Iida et al., "Dynamic TWDM-PON for Mobile Radio Access," Opt. Exp., vol. 21, no. 22, 2013, pp. 26209-26218. https://doi.org/10.1364/OE.21.026209
  5. N. Cheng et al., "Flexible TWDM PON System with Pluggable Optical Transceiver Modules," Opt. Exp., vol. 22, no. 2, 2014, pp. 2078-2091. https://doi.org/10.1364/OE.22.002078
  6. H. Yang et al., "ONU Migration in Dynamic Time and Wavelength Division Multiplexed Passive Optical Network (TWDM-PON)," Opt. Exp., vol. 21, no. 18, 2013, pp. 21491-21499. https://doi.org/10.1364/OE.21.021491
  7. S. Ihara et al., "Experimental Demonstration of C-Band Burst-Mode Transmission for High Power Budget (64-Split with 40 km Distance) TWDM-PON Systems," presented at the Conf. Opt. Commun., London, UK, Sept. 22-26, 2013, pp. 1-3.
  8. S.-G. Mun et al., "Wavelength Initialization Employing Wavelength Recognition Scheme in WDM-PON Based on Tunable Lasers," Opt. Fiber Technol., vol. 21, Jan. 2015, pp. 141-145. https://doi.org/10.1016/j.yofte.2014.10.002
  9. J. Kim et al., "Physical Media Dependent Prototype for 10-Gigabit-Capable PON OLT," ETRI J., vol. 35, no. 2, Apr. 2013, pp. 245-252. https://doi.org/10.4218/etrij.13.0112.0441
  10. Calix, "Burst Extinction Ratio Requirements," FSAN Bad Nauheim Meeting, Aug. 2013.
  11. H.H. Lee et al., "Investigation on Burst-Mode Inter-Channel Crosstalk in XG-PON and TWDM-PON," presented at the Opt. Fiber Commun. Conf., Los Angeles, CA, USA, 2014.
  12. H.Y. Rhy et al., "Inter-Channel Crosstalk Impairment of Time and Wavelength Division Multiplexing Passive Optical Network," presented at the European Conf. Opt. Commun., London, UK, Sept. 22-26, 2013, pp. 1-3.
  13. F. Liu, C.J. Rasmussen, and R.J.S. Pedersen, "Experimental Verification of a New Model Describing the Influence of Incomplete Signal Extinction Ratio on the Sensitivity Degradation due to Multiple Interferometric Crosstalk," Photon. Technol. Lett., vol. 11, no. 11, Jan. 1999, pp. 137-139. https://doi.org/10.1109/68.736421
  14. G.P. Agrawal, "Optical Receivers" in Fiber-Optic Communication Systems, New York, USA: Willey, 2010, pp. 133-178.
  15. M. Abramowitz and I.A. Stegun, Eds., "Handbook of Mathematical Functions," New York, USA: Dover, 1970.
  16. ITU-T Rec. G.987.2, 10-Gigabit-Capable Passive Optical Networks (XG-PON): Physical Media Dependent (PMD) Layer Specification, 2010.
  17. ITU-T Rec. G.984.5, Gigabit-Capable Passive Optical Networks (G-PON): Enhancement Band, 2014.
  18. W. Pohlmann et al., "Low Cost TWDM by Wavelength-Set Division Multiplexing," Bell Labs Techn. J., vol. 18, no. 3, 2013, pp. 173-193. https://doi.org/10.1002/bltj.21633
  19. N. Cheng et al., "Flexible TWDM PON with Load Balancing and Power Saving," presented at the European Conf. Opt. Commun., Anaheim, CA, USA, 2013.

Cited by

  1. Stochastic Channel Modeling for Kiosk Applications in the Terahertz Band vol.7, pp.5, 2016, https://doi.org/10.1109/tthz.2017.2720962