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Proceedings Paper

Reconfigurable and frequency-agile on-chip microwave photonic bandpass and bandstop filters using stimulated Brillouin scattering
Author(s): Amol Choudhary; Iman Aryanfar; Shayan Shahnia; Blair Morrison; Mattia Pagani; Yang Liu; Khu Vu; Stephen Madden; Barry Luther-Davies; David Marpaung; Benjamin J. Eggleton
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Paper 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.

Paper Details

Date Published: 7 September 2016
PDF: 7 pages
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
Show Author Affiliations
Amol Choudhary, The Univ. of Sydney (Australia)
Iman Aryanfar, The Univ. of Sydney (Australia)
Shayan Shahnia, The Univ. of Sydney (Australia)
Blair Morrison, The Univ. of Sydney (Australia)
Mattia Pagani, The Univ. of Sydney (Australia)
Yang Liu, The Univ. of Sydney (Australia)
Khu Vu, The Australian National Univ. (Australia)
Stephen Madden, The Australian National Univ. (Australia)
Barry Luther-Davies, The Australian National Univ. (Australia)
David Marpaung, The Univ. of Sydney (Australia)
Benjamin J. Eggleton, The Univ. of Sydney (Australia)

Published in SPIE Proceedings Vol. 9958:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications X
Shizhuo Yin; Ruyan Guo, Editor(s)

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