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Optical Engineering • Open Access

System performance analysis of time-division-multiplexing passive optical network using directly modulated lasers or colorless optical network units
Author(s): Xiaoxue Gong; Lei Guo; Yejun Liu; Yufang Zhou

Paper Abstract

As a promising technology for broadband communication, passive optical network (PON) has been deployed to support the last-mile broadband access network. In particular, time-division-multiplexing PON (TDM-PON) has been widely used owing to its mature technology and low cost. To practically implement TDM-PONs, the combination of intensity modulation and direct detection is a very promising technique because it achieves cost reduction in system installation and maintenance. However, the current intensity-modulation and direct-detection TDM-PON still suffers from some problems, which mainly include a high-power penalty, detrimental Brillouin backscattering (BB), and so on. Thus, using directly modulated lasers (DMLs) and colorless optical network units (ONUs), respectively, two intensity-modulation and direct-detection TDM-PON architectures are proposed. Using VPI (an optical simulation software developed by VPIphotonics company) simulators, we first analyze the influences on DML-based intensity-modulation and direct-detection TDM-PON (system 1) performances, which mainly include bit error rate (BER) and power penalty. Next, the BB effect on the BER of the intensity-modulation and direct-detection TDM-PON that uses colorless ONUs (system 2) is also investigated. The simulation results show that: (1) a low-power penalty is achieved without degrading the BER of system 1, and (2) the BB can be effectively reduced using phase modulation of the optical carrier in system 2.

Paper Details

Date Published: 27 May 2015
PDF: 8 pages
Opt. Eng. 54(5) 056110 doi: 10.1117/1.OE.54.5.056110
Published in: Optical Engineering Volume 54, Issue 5
Show Author Affiliations
Xiaoxue Gong, Northeastern Univ. (China)
Lei Guo, Northeastern Univ. (China)
Yejun Liu, Northeastern Univ. (China)
Yufang Zhou, Northeastern Univ. (China)

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