Adaptively loaded IM/DD optical OFDM based on set-partitioned QAM formats
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Published Version
Date
2017-04-17
Authors
Zhao, Jian
Chen, Lian-Kuan
Journal Title
Journal ISSN
Volume Title
Publisher
OSA Publishing
Published Version
Abstract
We investigate the constellation design and symbol error rate (SER) of set-partitioned (SP) quadrature amplitude modulation (QAM) formats. Based on the SER analysis, we derive the adaptive bit and power loading algorithm for SP QAM based intensity-modulation direct-detection (IM/DD) orthogonal frequency division multiplexing (OFDM). We experimentally show that the proposed system significantly outperforms the conventional adaptively-loaded IM/DD OFDM and can increase the data rate from 36 Gbit/s to 42 Gbit/s in the presence of severe dispersion-induced spectral nulls after 40-km single-mode fiber. It is also shown that the adaptive algorithm greatly enhances the tolerance to fiber nonlinearity and allows for more power budget.
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Keywords
Fiber optics communications , Modulation
Citation
Zhao, J. and Chen, L.-K. (2017) 'Adaptively loaded IM/DD optical OFDM based on set-partitioned QAM formats', Optics Express, 25(8), pp. 9368-9377. doi:10.1364/OE.25.009368
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© 2017 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.