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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 14 — Jul. 7, 2008
  • pp: 10434–10439

A WDM passive optical network enabling multicasting with color-free ONUs

Yue Tian, Qingjiang Chang, and Yikai Su  »View Author Affiliations

Optics Express, Vol. 16, Issue 14, pp. 10434-10439 (2008)

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We propose a wavelength-division-multiplexed (WDM) passive optical network (PON) to provide conventional unicast data and downstream multicast function. At the optical line terminal (OLT), for each WDM channel, a dual-drive Mach-Zehnder modulator (DDMZM) is used to generate a sub-carrier double-sideband differential-phase-shift-keying (DPSK) signal. All the central carriers are separated and subsequently modulated to deliver the multicast data, while the remaining sub-carrier DPSK signals carry the downstream unicast traffic. In the optical network units (ONUs), part of the downstream unicast signal power is re-modulated for upstream transmission, which enables source-free ONUs. The proposed scheme is experimentally demonstrated with 1.25-Gb/s downstream unicast, multicast and upstream data.

© 2008 Optical Society of America

OCIS Codes
(060.4510) Fiber optics and optical communications : Optical communications
(060.5060) Fiber optics and optical communications : Phase modulation
(060.4255) Fiber optics and optical communications : Networks, multicast

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: April 3, 2008
Revised Manuscript: June 10, 2008
Manuscript Accepted: June 10, 2008
Published: June 27, 2008

Yue Tian, Qingjiang Chang, and Yikai Su, "A WDM passive optical network enabling multicasting with color-free ONUs," Opt. Express 16, 10434-10439 (2008)

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  1. E. S. Son, K. H. Han, J. K. Kim, and Y. C. Chung, "Bidirectional WDM passive optical network for simultaneous transmission of data and digital broadcast video service," J. Lightwave Technol. 21, 1723-1727 (2003). [CrossRef]
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