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Optical Engineering

Performance improvement by orthogonal pulse amplitude modulation and discrete multitone modulation signals in hybrid fiber-visible laser light communication system
Author(s): Fangliu Zhang; Jing He; Rui Deng; Qinghui Chen; Lin Chen
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Paper Abstract

A modulation format, orthogonal pulse amplitude modulation and discrete multitone modulation (O-PAM-DMT), is experimentally demonstrated in a hybrid fiber-visible laser light communication (fiber-VLLC) system using a cost-effective directly modulated laser and blue laser diode. In addition, low overhead is achieved by utilizing only one training sequence to implement synchronization and channel estimation. Through adjusting the ratio of PAM and DMT signal, three types of O-PAM-DMT signals are investigated. After transmission over a 20-km standard single-mode fiber and 5-m free-space VLLC, the receiver sensitivity for 4.36-Gbit/s O-PAM-DMT signals can be improved by 0.4, 1.4, and 2.7 dB, respectively, at a bit error rate of 1×10−3, compared with a conventional DMT signal.

Paper Details

Date Published: 11 October 2016
PDF: 5 pages
Opt. Eng. 55(10) 106106 doi: 10.1117/1.OE.55.10.106106
Published in: Optical Engineering Volume 55, Issue 10
Show Author Affiliations
Fangliu Zhang, Hunan Univ. (China)
Jing He, Hunan Univ. (China)
Rui Deng, Hunan Univ. (China)
Qinghui Chen, Hunan Univ. (China)
Lin Chen, Hunan Univ. (China)


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