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Microwave photonic filters using low-cost sources featuring tunability, reconfigurability and negative coefficients

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Abstract

We propose and experimentally demonstrate two configurations of photonic filters for the processing of microwave signals featuring tunability, reconfigurability and negative coefficients based on the use of low cost optical sources. The first option is a low power configuration based on spectral slicing of a broadband source. The second is a high power configuration based on fixed lasers. Tunability, reconfigurability and negative coefficients are achieved by means of a MEMS cross-connect, a variable optical attenuator array and simple 2×2 switches respectively

©2005 Optical Society of America

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Figures (5)

Fig. 1.
Fig. 1. Transversal filter configurations and experimental layouts
Fig. 2.
Fig. 2. Transfer functions of a 7 tap transversal filter with a switched dispersive delay line of 24 km using fixed laser diodes
Fig. 3.
Fig. 3. Transfer functions of a 7 tap transversal filter with a switched dispersive delay line of 29.8 km using fixed laser diodes
Fig. 4.
Fig. 4. Transfer functions of a 7 tap transversal filter with a switched dispersive delay line of 48 km using fixed laser diodes
Fig. 5.
Fig. 5. Transfer functions of a 9 tap transversal filter with a switched dispersive delay line of 24 km using a sliced broadband source
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