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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and V. Chan
  • Vol. 2, Iss. 3 — Mar. 1, 2010
  • pp: 131–136

Nonreciprocal Optical Modulation for Colorless Integrated Optical Transceivers in Passive Optical Networks

Lin Xu and Hon Ki Tsang  »View Author Affiliations

Journal of Optical Communications and Networking, Vol. 2, Issue 3, pp. 131-136 (2010)

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Wavelength remodulation schemes reuse the optical carrier received in a downstream signal for the upstream link and are cost-effective in eliminating the need for specific wavelength sources at the optical networking units (ONUs). We describe a study comparing the performance of a wavelength-remodulated wavelength-division-multiplexed (WDM) passive optical network (PON) using amplitude modulation [amplitude-shift keying (ASK)] downstream and phase modulation [differential phase-shift keying (DPSK)] upstream with a system using DPSK downstream and ASK upstream based on nonreciprocal modulators. We measured the conditions needed for both downstream and upstream signals to achieve a high extinction ratio (ER) and error-free operation at 10 Gb s . Both schemes can give error-free operation. ASK downstream with orthogonally remodulated DPSK upstream (ASK/DPSK) may potentially be more cost-effective because it can use a common decoder in the central office instead of requiring individual DPSK decoders at each ONU. However, DPSK downstream with orthogonally remodulated ASK upstream (DPSK/ASK) is more suitable for long-reach access networks since it has a better power budget for long-reach PON.

© 2010 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2340) Fiber optics and optical communications : Fiber optics components

ToC Category:
Research Papers

Original Manuscript: November 5, 2009
Revised Manuscript: January 21, 2010
Manuscript Accepted: January 22, 2010
Published: February 22, 2010

Lin Xu and Hon Ki Tsang, "Nonreciprocal Optical Modulation for Colorless Integrated Optical Transceivers in Passive Optical Networks," J. Opt. Commun. Netw. 2, 131-136 (2010)

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