title: Photonic chip based tunable and reconfigurable narrowband microwave photonic filter using stimulated Brillouin scattering.
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.
authors.affiliation: Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), Institute of Photonics and Optical Science (IPOS), School of Physics, The University of Sydney, NSW 2006, Australia.
authors.forename: Adam
authors.initials: A
authors.lastname: Byrnes
authors.forename: Ravi
authors.initials: R
authors.lastname: Pant
authors.forename: Enbang
authors.initials: E
authors.lastname: Li
authors.forename: Duk-Yong
authors.initials: DY
authors.lastname: Choi
authors.forename: Christopher G
authors.initials: CG
authors.lastname: Poulton
authors.forename: Shanhui
authors.initials: S
authors.lastname: Fan
authors.forename: Steve
authors.initials: S
authors.lastname: Madden
authors.forename: Barry
authors.initials: B
authors.lastname: Luther-Davies
authors.forename: Benjamin J
authors.initials: BJ
authors.lastname: Eggleton
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008872:Microwaves; D017785:Photons; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D013685:Telecommunications / Q000295:instrumentation*