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

Hu, Zhouyi; Shao, Yingjie; Ouyang, Xing; Tong, Yeyu; Zhao, Jian; Tsang, Hon Ki; Townsend, Paul D.; Chan, Chun-Kit

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

Files

oe-27-23-33789.pdf(1.58 MB)

Published version

Date

2019-11-04

Authors

Hu, Zhouyi

Shao, Yingjie

Ouyang, Xing

Tong, Yeyu

Zhao, Jian

Tsang, Hon Ki

Townsend, Paul D.

Chan, Chun-Kit

Publisher

Optical Society of America

Published Version

10.1364/OE.27.033789

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

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