7 September 2016 Reconfigurable and frequency-agile on-chip microwave photonic bandpass and bandstop filters using stimulated Brillouin scattering
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Abstract
In this paper, we present our recent results in the area of microwave photonics. Integrated microwave photonic bandpass and bandstop filters were realized using stimulated Brillouin scattering (SBS). Our recent breakthrough in the fabrication of chalcogenide waveguides has allowed us to achieve an on-chip SBS gain of >40 dB, enabling for the first time the tailoring of the SBS response well beyond the intrinsic linewidth (~30 MHz). An electrical comb generated by an arbitrary waveform generator was modulated onto an optical carrier to generate a broadened pump which via the SBS effect created a flat and rectangular bandpass filter response in the RF domain. Controlling the number of pump lines allowed bandwidth reconfigurability from 30 MHz to 440 MHz. The measured selectivity and the passband ripple were >20 dB and <1.9 dB, respectively and the center frequency of the filter was tuned up to 30 GHz. A bandstop filter response was realized by using a novel RF interferometry technique via accurate control of the amplitude and phase of the sidebands of the modulated probe. The bandwidth was reconfigurable from 75 MHz-300 MHz and the central frequency of the filter was tunable up to 30 GHz.
Conference Presentation
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Amol Choudhary, Amol Choudhary, Iman Aryanfar, Iman Aryanfar, Shayan Shahnia, Shayan Shahnia, Blair Morrison, Blair Morrison, Mattia Pagani, Mattia Pagani, Yang Liu, Yang Liu, Khu Vu, Khu Vu, Stephen Madden, Stephen Madden, Barry Luther-Davies, Barry Luther-Davies, David Marpaung, David Marpaung, Benjamin J. Eggleton, Benjamin J. Eggleton, } "Reconfigurable and frequency-agile on-chip microwave photonic bandpass and bandstop filters using stimulated Brillouin scattering", Proc. SPIE 9958, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications X, 99580E (7 September 2016); doi: 10.1117/12.2235672; https://doi.org/10.1117/12.2235672
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