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Optical Engineering

Demonstration of a spectrum efficient 8×1.25  Gb/s electrical code-division multiplexing passive optical network based on wavelet packet transform coding
Author(s): Jilong Han; Yimeng Wang; Wei Li; Rong Hu; Zhixue He; Ming Luo; Qi Yang; Shaohua Yu
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Paper Abstract

An electrical code-division multiplexing passive optical network (ECDM-PON) method is proposed in which a spectrum-efficient orthogonal coding based on wavelet packet is used. Comparing to the normal Walsh or Gold code which had been used widely in ECDM-PON systems, the proposed coding can reduce bandwidth by about 40% at 8×1.25  Gb/s, which can reduce the optical devices’ bandwidth of the whole system. The principle of the coding is shown. Through experiments, a 1.25  Gb/s per channel by 8-channels downstream transmission of a 10  Gb/s ECDM-PON demonstrates the efficiency of our proposed system. Only 6-GHz bandwidth is enough for transmitting the 8×1.25  Gb/s signal using our proposed method which, achieves a spectrum efficiency of about 1.67  bit/s/Hz. Error free transmission is achieved using 8-chip electrical codes over 20-km standard single mode fiber (SSMF).

Paper Details

Date Published: 15 May 2015
PDF: 5 pages
Opt. Eng. 54(5) 056104 doi: 10.1117/1.OE.54.5.056104
Published in: Optical Engineering Volume 54, Issue 5
Show Author Affiliations
Jilong Han, Wuhan National Lab. for Optoelectronics (China)
Yimeng Wang, Wuhan National Lab. for Optoelectronics (China)
Wei Li, Wuhan National Lab. for Optoelectronics (China)
Rong Hu, Wuhan Research Institute of Posts and Telecommunications (China)
Zhixue He, Wuhan Research Institute of Posts and Telecommunications (China)
Ming Luo, Wuhan Research Institute of Posts and Telecommunications (China)
Qi Yang, Wuhan Research Institute of Posts and Telecommunications (China)
Shaohua Yu, Wuhan Research Institute of Posts and Telecommunications (China)


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