Comb-based radio-frequency photonic filtering with 20 ns bandwidth reconfiguration
Leaird, Daniel E.
Weiner, Andrew M.
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We present a scheme to generate a 10 GHz optical frequency comb that is bandwidth reconfigurable on a time scale of tens of nanoseconds via electronic control of the drive signal to a phase modulator. When such a comb is used as the source for a radio-frequency (RF) photonic filter employing dispersive propagation, the RF filter bandwidth varies in inverse proportion to the optical bandwidth. As a result we are able to demonstrate, for the first time to our knowledge, bandwidth-reconfigurable RF filtering with transition times under 20 ns. The reconfiguration speed is determined by the response time of a programmable RF variable attenuator.
Optics LettersThe article of record as published may be found at http://dx.doi.org/10.1364/ol.38.002735
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