Photonic chip based tunable and reconfigurable narrowband microwave photonic filter using stimulated Brillouin scattering

Authors

Adam Byrnes, University of Sydney
Ravi Pant, University of Sydney
Enbang Li, University of WollongongFollow
Duk-Yong Choi, Australian National University
Christopher G. Poulton, University of Technology Sydney
Shanhui Fan, Stanford University
Steve J. Madden, Australian National University
Barry Luther-Davies, Australian National University
Benjamin J. Eggleton, University of Sydney

RIS ID

93394

Publication Details

Byrnes, A., Pant, R., Li, E., Choi, D., Poulton, C. G., Fan, S., Madden, S., Luther-Davies, B. & Eggleton, B. J. (2013). Photonic chip based tunable and reconfigurable narrowband microwave photonic filter using stimulated Brillouin scattering. Optics Express, 20 (17), 18836-18845.

Abstract

We report the first demonstration of a photonic chip based dynamically reconfigurable, widely tunable, narrow pass-band, high Q microwave photonic filter (MPF). We exploit stimulated Brillouin scattering (SBS) in a 6.5 cm long chalcogenide (As2S3) photonic chip to demonstrate a MPF that exhibited a high quality factor of ~520 and narrow bandwidth and was dynamically reconfigurable and widely tunable. It maintained a stable 3 dB bandwidth of 23 ± 2MHz and amplitude of 20 ± 2 dB over a large frequency tuning range of 2-12 GHz. By tailoring the pump spectrum, we reconfigured the 3 dB bandwidth of the MPF from ~20 MHz to ~40 MHz and tuned the shape factor from 3.5 to 2 resulting in a nearly flat-topped filter profile. This demonstration represents a significant advance in integrated microwave photonics with potential applications in on-chip microwave signal processing for RADAR and analogue communications.