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Key technologies for high-speed digital coherent optical communications

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2 Author(s)
Lei Xu ; NEC Labs. America, Princeton, NJ, USA ; Ting Wang

Digital coherent optical communication technologies have shown superior performance in supporting high-bit-rate optical communications, including high fiber chromatic dispersion (CD) and polarization mode dispersion (PMD) tolerance, and high spectral efficiency. We review the typical system design and principles of dual-polarization digital coherent optical communications, and further show a new dual-stage cascaded frequency offset estimator in achieving very high performance.

Published in:

Information Photonics (IP), 2011 ICO International Conference on

Date of Conference:

18-20 May 2011