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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 22 — Oct. 25, 2010
  • pp: 23161–23172

Frequency interleaving towards spectrally efficient directly detected optical OFDM for next-generation optical access networks

Lenin Mehedy, Masuduzzaman Bakaul, and Ampalavanapillai Nirmalathas  »View Author Affiliations


Optics Express, Vol. 18, Issue 22, pp. 23161-23172 (2010)
http://dx.doi.org/10.1364/OE.18.023161


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Abstract

In this paper, we theoretically analyze and demonstrate that spectral efficiency of a conventional direct detection based optical OFDM system (DDO-OFDM) can be improved significantly using frequency interleaving of adjacent DDO-OFDM channels where OFDM signal band of one channel occupies the spectral gap of other channel and vice versa. We show that, at optimum operating condition, the proposed technique can effectively improve the spectral efficiency of the conventional DDO-OFDM system as much as 50%. We also show that such a frequency interleaved DDO-OFDM system, with a bit rate of 48 Gb/s within 25 GHz bandwidth, achieves sufficient power budget after transmission over 25 km single mode fiber to be used in next-generation time-division-multiplexed passive optical networks (TDM-PON). Moreover, by applying 64- quadrature amplitude modulation (QAM), the system can be further scaled up to 96 Gb/s with a power budget sufficient for 1:16 split TDM-PON.

© 2010 OSA

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
(060.4080) Fiber optics and optical communications : Modulation
(060.4230) Fiber optics and optical communications : Multiplexing
(060.4510) Fiber optics and optical communications : Optical communications

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: August 5, 2010
Revised Manuscript: October 1, 2010
Manuscript Accepted: October 1, 2010
Published: October 19, 2010

Citation
Lenin Mehedy, Masuduzzaman Bakaul, and Ampalavanapillai Nirmalathas, "Frequency interleaving towards spectrally efficient directly detected optical OFDM for next-generation optical access networks," Opt. Express 18, 23161-23172 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-22-23161


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