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Proceedings Paper

Characteristics of cascaded FILM filters in wavelength division multiplexing system
Author(s): Yue Wang; Xiaodong Tang; WeiSheng Hu
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Paper Abstract

The optical signal along the light-path in the optical network will traverse a cascade of optical filters. The equivalent pass-band ofthe cascaded filters decreases in comparison with a single filter, and it is required that the light sources should be much more stable. In this paper, we investigated the cascaded characteristics of FILM filters that are widely used in WDM systems due to their flat pass-band and low insertion loss. Both the influence of amplitude response and the influence of phase response are considered together. Firstly, we give two equations of the pass-band characters and the phase response of FILM filters, and then calculate the variation of the cascaded FILM filters' bandwidth versus the number of the cascaded filters. We evaluated the influence of the filters' phase nonlinearity in more detail. The simulation results imply that the frequency range ofthe cascaded FILM filters under the condition of zero power penalty decreases, and the power penalty curve caused by phase nonlinearity fluctuates more drastically than that without the consideration ofthe phase response.

Paper Details

Date Published: 23 August 2002
PDF: 6 pages
Proc. SPIE 4906, Optical Components and Transmission Systems, (23 August 2002); doi: 10.1117/12.480597
Show Author Affiliations
Yue Wang, Shanghai Jiao Tong Univ. (China)
Xiaodong Tang, Shanghai Jiao Tong Univ. (China)
WeiSheng Hu, Shanghai Jiao Tong Univ. (China)

Published in SPIE Proceedings Vol. 4906:
Optical Components and Transmission Systems
WeiSheng Hu; Shoichi Sudo; Peter Kaiser, Editor(s)

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