Lasers, Fiber Optics, and Communications

Demonstration of a spectrum efficient 8×1.25  Gb/s electrical code-division multiplexing passive optical network based on wavelet packet transform coding

[+] Author Affiliations
Jilong Han, Yimeng Wang, Wei Li

Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China

Rong Hu, Zhixue He, Ming Luo, Qi Yang, Shaohua Yu

Wuhan Research Institute of Posts and Telecommunications, State Key Laboratory of Optical Communication Technologies and Networks, Wuhan 430074, China

Opt. Eng. 54(5), 056104 (May 15, 2015). doi:10.1117/1.OE.54.5.056104
History: Received March 21, 2015; Accepted April 22, 2015
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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 8×1.25Gb/s, which can reduce the optical devices’ bandwidth of the whole system. The principle of the coding is shown. Through experiments, a 1.25Gb/s per channel by 8-channels downstream transmission of a 10Gb/s ECDM-PON demonstrates the efficiency of our proposed system. Only 6-GHz bandwidth is enough for transmitting the 8×1.25Gb/s signal using our proposed method which, achieves a spectrum efficiency of about 1.67bit/s/Hz. Error free transmission is achieved using 8-chip electrical codes over 20-km standard single mode fiber (SSMF).

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Jilong Han ; Yimeng Wang ; Wei Li ; Rong Hu ; Zhixue He, et al.
"Demonstration of a spectrum efficient 8×1.25  Gb/s electrical code-division multiplexing passive optical network based on wavelet packet transform coding", Opt. Eng. 54(5), 056104 (May 15, 2015). ; http://dx.doi.org/10.1117/1.OE.54.5.056104


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