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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 18 — Sep. 9, 2013
  • pp: 21097–21104

Design and demonstration of a colorless WDM-OFDMA PON system architecture achieving symmetric 20-Gb/s transmissions with residual interference compensation

Hsing-Yu Chen, Maria Yuang, Po-Lung Tien, Dar-Zu Hsu, Chia-Chien Wei, Yu-Shen Tsai, and Jyehong Chen  »View Author Affiliations

Optics Express, Vol. 21, Issue 18, pp. 21097-21104 (2013)

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In this paper, we propose a two-tiered colorless WDM-OFDMA PON system architecture that draws strengths from each individual WDM and OFDM PON systems. Specifically, the two-tiered architecture enables a colorless transceiver to be shared by a group of ONUs, resulting in drastic reduction of the system cost. For achieving colorlessness via reusing downstream light sources, we discover the residual power of downstream signal unexpectedly springs back after transmissions, causing severe interference to the upstream signal, and thus limiting the data rate of the upstream signal. We devise a method of adopting a common dispersion compensation module at OLT to reduce the residual power over all wavelengths. Experimental results show that, with an improvement of upstream signal’s SNR up to 10dB, the system successfully achieves 20-Gb/s bidirectional OFDM-signal transmissions on the same wavelength over a 20-km SMF.

© 2013 OSA

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4080) Fiber optics and optical communications : Modulation

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: July 1, 2013
Revised Manuscript: August 2, 2013
Manuscript Accepted: August 11, 2013
Published: September 3, 2013

Hsing-Yu Chen, Maria Yuang, Po-Lung Tien, Dar-Zu Hsu, Chia-Chien Wei, Yu-Shen Tsai, and Jyehong Chen, "Design and demonstration of a colorless WDM-OFDMA PON system architecture achieving symmetric 20-Gb/s transmissions with residual interference compensation," Opt. Express 21, 21097-21104 (2013)

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