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http://dx.doi.org/10.3807/JOSK.2014.18.5.449

Sidelobe Suppression Enhancement of Radiofrequency Photonic Filters via Time-to-frequency Mapping  

Song, Min-Hyup (Electronics and Telecommunication Research Institute)
Publication Information
Journal of the Optical Society of Korea / v.18, no.5, 2014 , pp. 449-452 More about this Journal
Abstract
We present a multi-tap microwave photonic filter with high selectivity through applying time-to-frequency mapping and optical frequency comb shaping techniques. When arranged in the time-to-frequency mapping stage, by a Fourier transform, the deviation of the optical taps to the target profile is significantly reduced while maintaining the apodization profile, resulting in high sidelobe suppression in the filters. By applying a simple time-to-frequency mapping stage to the conventional optical frequency combs, we demonstrate a substantially enhanced (>10dB) sidelobe suppression, resulting in filter lineshapes exhibiting a significantly high (>40dB) main lobe to sidelobe suppression ratio. These results highlight the potential of the technique for implementation in various passband filters with high sidelobe suppression.
Keywords
Microwave photonic filters; Optical frequency combs; Pulse shaping; Time to frequency conversion;
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