Characteristics of cascaded FILM filters in wavelength division multiplexing system

Yue Wang; Xiaodong Tang; WeiSheng Hu

doi:10.1117/12.480597

23 August 2002 Characteristics of cascaded FILM filters in wavelength division multiplexing system

Yue Wang, Xiaodong Tang, WeiSheng Hu

Proceedings Volume 4906, Optical Components and Transmission Systems; (2002) https://doi.org/10.1117/12.480597
Event: Asia-Pacific Optical and Wireless Communications 2002, 2002, Shanghai, China

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.

Citation Download Citation

Yue Wang, Xiaodong Tang, and WeiSheng Hu "Characteristics of cascaded FILM filters in wavelength division multiplexing system", Proc. SPIE 4906, Optical Components and Transmission Systems, (23 August 2002); https://doi.org/10.1117/12.480597

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KEYWORDS

Optical filters

Wavelength division multiplexing

Nonlinear filtering

Electronic filtering

Dispersion

Linear filtering

Computer simulations

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