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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 26 — Dec. 22, 2008
  • pp: 21943–21943
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Coherent detection in optical fiber systems: erratum

Ezra Ip, Alan Pak Tao Lau, Daniel J. F. Barros, and Joseph M. Kahn  »View Author Affiliations


Optics Express, Vol. 16, Issue 26, pp. 21943-21943 (2008)
http://dx.doi.org/10.1364/OE.16.021943


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Abstract

We correct a table showing the signal-to-noise ratio obtained in coherent detection. We also clarify a table showing the bandwidth requirements for homodyne and heterodyne downconverters. Otherwise, our previous results and conclusions are unchanged.

© 2008 Optical Society of America

In Section 3 of article [1

1. E. Ip, A. P. T. Lau, D. J. F. Barros, and J. M. Kahn, “Coherent detection in optical fiber systems,” Optics Express 16, 753–791 (2008). [CrossRef] [PubMed]

], we showed a table of the signal-to-noise ratios (SNR) per symbol γ s obtained when using coherent detection in conjunction with different optoelectronic downconverters under different noise regimes. We found an error for single-quadrature homodyne downconversion in the shot-noise-limited case. The corrected table is given in Table 1.

Table 1. SNR per symbol for various receiver configurations. For the ASE-limited cases, n̄s is the average number of photons received per symbol, NA is the number of fiber spans, and nsp is the spontaneous emission noise factor of the inline amplifiers. For the LO shot-noise-limited cases, n̄r=ηn̄s is the number of detected photons per symbol, where η is the quantum efficiency of the photodiodes. For the ASE-limited heterodyne case, image-band rejection is assumed.

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In addition, we wish to clarify the bandwidth requirement for a heterodyne downconverter by making the following modification to Table 2.

Table 2. Comparison between homodyne and heterodyne downconverters.

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References and links

1.

E. Ip, A. P. T. Lau, D. J. F. Barros, and J. M. Kahn, “Coherent detection in optical fiber systems,” Optics Express 16, 753–791 (2008). [CrossRef] [PubMed]

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2920) Fiber optics and optical communications : Homodyning
(060.4080) Fiber optics and optical communications : Modulation
(060.5060) Fiber optics and optical communications : Phase modulation
(060.2840) Fiber optics and optical communications : Heterodyne

ToC Category:
Review

History
Original Manuscript: December 15, 2008
Published: December 17, 2008

Citation
Ezra Ip, Alan P. Lau, Daniel J. Barros, and Joseph M. Kahn, "Coherent detection in optical fiber systems: erratum," Opt. Express 16, 21943-21943 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-26-21943

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