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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 4 — Feb. 14, 2011
  • pp: 2979–2988

Real-time experimental demonstration of low-cost VCSEL intensity-modulated 11.25Gb/s optical OFDM signal transmission over 25km PON systems

E. Hugues-Salas, R.P. Giddings, X.Q. Jin, J. L. Wei, X. Zheng, Y. Hong, C. Shu, and J.M. Tang  »View Author Affiliations


Optics Express, Vol. 19, Issue 4, pp. 2979-2988 (2011)
http://dx.doi.org/10.1364/OE.19.002979


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Abstract

The feasibility of utilising low-cost, un-cooled vertical cavity surface-emitting lasers (VCSELs) as intensity modulators in real-time optical OFDM (OOFDM) transceivers is experimentally explored, for the first time, in terms of achievable signal bit rates, physical mechanisms limiting the transceiver performance and performance robustness. End-to-end real-time transmission of 11.25Gb/s 64-QAM-encoded OOFDM signals over simple intensity modulation and direct detection, 25km SSMF PON systems is experimentally demonstrated with a power penalty of 0.5dB. The low extinction ratio of the VCSEL intensity-modulated OOFDM signal is identified to be the dominant factor determining the maximum obtainable transmission performance. Experimental investigations indicate that, in addition to the enhanced transceiver performance, adaptive power loading can also significantly improve the system performance robustness to variations in VCSEL operating conditions. As a direct result, the aforementioned capacity versus reach performance is still retained over a wide VCSEL bias (driving) current (voltage) range of 4.5mA to 9mA (275mVpp to 320mVpp). This work is of great value as it demonstrates the possibility of future mass production of cost-effective OOFDM transceivers for PON applications.

© 2011 OSA

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.4080) Fiber optics and optical communications : Modulation
(060.3510) Fiber optics and optical communications : Lasers, fiber

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: December 13, 2010
Revised Manuscript: January 28, 2011
Manuscript Accepted: January 28, 2011
Published: February 1, 2011

Citation
E. Hugues-Salas, R.P. Giddings, X.Q. Jin, J. L. Wei, X. Zheng, Y. Hong, C. Shu, and J.M. Tang, "Real-time experimental demonstration of low-cost VCSEL intensity-modulated 11.25Gb/s optical OFDM signal transmission over 25km PON systems," Opt. Express 19, 2979-2988 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-4-2979


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