Sub-MHz microwave photonic bandpass filter using backward scattering in an ultrahigh-Q microcavity is proposed and experimentally demonstrated. The bandpass transmission spectrum with a Q factor of ~108 and high-order modes effectively suppressed is realized based on the backward scattering in a single ultrahigh-Q microcavity. Compared to reported works on microwave photonic bandpass filter, the bandwidth in this work is lowered over an order of magnitude.
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Sub-MHz microwave photonic bandpass filter using backward scattering in an ultrahigh-Q microcavity
Published: 21 July 2017 by MDPI in The 7th International Multidisciplinary Conference on Optofluidics 2017 session Other emerging and multidisciplinary researches