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Proceedings Paper

Same-source cross talk in the WDM dynamic all-optical cross-connects
Author(s): Wenlu Chen; Hai-yun Zhang; Yunsi Fei; Lei Zong; Yili Guo; BingKun Zhou
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Paper Abstract

This paper points out that, in a dynamic optical cross-connect (OXC) of the WDM all optical networks, there exists a kind of coherent crosstalk, the same-source crosstalk. This kind of crosstalk, though originated from the same source but passing through the different light paths, may interference with the signal at the output and impose power penalty on the system. The formulas and their deduction are also given, as well as some examples applying this formulas are presented. The analysis shows that the impact of the same-source crosstalk can cause more severe system degradation than other kinds of same-wavelength crosstalk do. Consequently, it will requires more stringent optical isolation performance of the WDM device as long as conceiving the same-source crosstalk. In this paper, we also proposed a new modification of the OXC structure, in which optical path differences of each wavelength channel are introduced by adding appropriate length of optical fiber. The simulation results show that this new structure can distinctively reduce the impact of the same-source crosstalk, and the crosstalk requirement on optical network elements may be significantly relaxed. Furthermore, the additional hardware cost is very low.

Paper Details

Date Published: 6 August 1998
PDF: 5 pages
Proc. SPIE 3552, Fiber Optic Components and Optical Communication II, (6 August 1998); doi: 10.1117/12.318012
Show Author Affiliations
Wenlu Chen, Tsinghua Univ. (China)
Hai-yun Zhang, Tsinghua Univ. (China)
Yunsi Fei, Tsinghua Univ. (China)
Lei Zong, Tsinghua Univ. (China)
Yili Guo, Tsinghua Univ. (China)
BingKun Zhou, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 3552:
Fiber Optic Components and Optical Communication II
Shuisheng Jian; Franklin F. Tong; Reinhard Maerz, Editor(s)

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