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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and O. Gerstel
  • Vol. 4, Iss. 11 — Nov. 1, 2012
  • pp: B77–B84

40 Gb/s Operation of SOA-REAM in Single-Feeder WDM-PON [Invited]

Qi Guo and An V. Tran  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 4, Issue 11, pp. B77-B84 (2012)
http://dx.doi.org/10.1364/JOCN.4.000B77


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Abstract

The integrated semiconductor optical amplifier (SOA) with a reflective electro-absorption modulator (REAM) is a promising candidate for the colorless optical network unit in a wavelength-division-multiplexed passive optical network (WDM-PON), due to its low chirp and wide bandwidth. However, 40 Gb/s operation of REAMs (bandwidth ≤ 20 GHz) still encounters severe intersymbol interference. Furthermore, Rayleigh backscattering (RB) and discrete reflections cause strong beat noise in WDM-PONs with single-fiber loopback configuration. In this paper, we present two novel techniques based on electrical equalization for a 40-Gb/s single-feeder WDM-PON based on SOA-REAM. The first method is to employ partial-response (PR) signaling and a noise predictive maximum likelihood (NPML) equalizer at the upstream receiver. The other one combines correlative level (CL) pre-coding with partial-response maximum likelihood (PRML) equalization. We experimentally demonstrate a 40-Gb/s uplink of 20 km using a 20-GHz SOA-REAM in a WDM-PON by both PR-NPML and CL-PRML. The results also verify the superiority of PR-NPML over the previously reported equalizers. Moreover, compared with PR-NPML, CL-PRML further improves the system performance. Experiments prove that the tolerance to beat noise and the receiver sensitivity are enhanced by 4 dB and 0.8 dB, respectively, at a bit error ratio of 2 × 1 0 4 .

© 2012 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

ToC Category:
OFC/NFOEC 2012

History
Original Manuscript: June 4, 2012
Revised Manuscript: September 7, 2012
Manuscript Accepted: September 14, 2012
Published: October 18, 2012

Citation
Qi Guo and An V. Tran, "40 Gb/s Operation of SOA-REAM in Single-Feeder WDM-PON [Invited]," J. Opt. Commun. Netw. 4, B77-B84 (2012)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-4-11-B77

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