Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 30, Issue 24, Pages 3816-3823Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2012.2210861
Keywords
Coherent optical orthogonal frequency-division multiplexing (CO-OFDM); superchannel; wavelength-division multiplexing (WDM)
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This paper reviews recent advances in the generation, detection and transmission of orthogonal-frequency-division-multiplexing (OFDM) based superchannels, enabled by efficient and powerful digital signal processors. The use of OFDM to form a superchannel can be (1) at the modulation stage by naturally realizing a square-like signal spectral shape to allow close packing of multiple modulated signals, and/or (2) at the optical multiplexing stage by seamlessly multiplexing these modulated signals. This paper reviews recent advances in this field. Several OFDM-based superchannel architectures are described and compared.
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