Experimental demonstration of 111.1-Gb/s net information rate using IM/DD probabilistically shaped orthogonal chirp-division multiplexing with a 10-GHz-class modulator
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Date
2019-11-04
Authors
Hu, Zhouyi
Shao, Yingjie
Ouyang, Xing
Tong, Yeyu
Zhao, Jian
Tsang, Hon Ki
Townsend, Paul D.
Chan, Chun-Kit
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Publisher
Optical Society of America
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Abstract
We propose probabilistically shaped quadrature amplitude modulation (PS-QAM) formats to maximize the capacity in fiber transmission systems using orthogonal chirp-division multiplexing (OCDM). OCDM possesses the property of chirp spread spectrum (CSS), leading to improved resilience to system impairments. We further investigate the recently proposed robust channel estimator based on pulse compression and noise rejection and experimentally demonstrate its feasibility in an intensity-modulated/direction-detection (IM/DD) OCDM system. By applying the proposed PS-QAM based OCDM to an IM/DD optical system, a net information rate of 111.1 Gb/s has been successfully achieved using a 10-GHz class Mach–Zehnder modulator (MZM) and has also shown improved performance compared to the conventional PS-QAM based orthogonal frequency-division multiplexing (OFDM) systems. Moreover, due to the superior characteristics of OCDM, there is no need for additional feedback to obtain the prior knowledge of channel state information in the proposed system, leading to reduced complexity and cost
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Keywords
Experimental , Demonstration , Probabilistically shaped orthogonal , Chirp-divison
Citation
Hu, Z., Shao, Y., Ouyang, X., Tong, Y., Zhao, J., Tsang, H. K., Townsend, P. D. and Chan, C.-K. (2019) 'Experimental demonstration of 111.1-Gb/s net information rate using IM/DD probabilistically shaped orthogonal chirp-division multiplexing with a 10-GHz-class modulator', Optics Express, 27(23), pp. 33789-33798. doi: 10.1364/OE.27.033789
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© 2019, Optical Society of America under the terms of the OSA Open Access Publishing Agreement.