Same-source cross talk in the WDM dynamic all-optical cross-connects

Wenlu Chen; Hai-yun Zhang; Yunsi Fei; Lei Zong; Yili Guo; BingKun Zhou

doi:10.1117/12.318012

6 August 1998 Same-source cross talk in the WDM dynamic all-optical cross-connects

Wenlu Chen, Hai-yun Zhang, Yunsi Fei, Lei Zong, Yili Guo, BingKun Zhou

Proceedings Volume 3552, Fiber Optic Components and Optical Communication II; (1998) https://doi.org/10.1117/12.318012
Event: Photonics China '98, 1998, Beijing, China

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.

Citation Download Citation

Wenlu Chen, Hai-yun Zhang, Yunsi Fei, Lei Zong, Yili Guo, and BingKun Zhou "Same-source cross talk in the WDM dynamic all-optical cross-connects", Proc. SPIE 3552, Fiber Optic Components and Optical Communication II, (6 August 1998); https://doi.org/10.1117/12.318012

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