Highly localized distributed Brillouin scattering response in a photonic integrated circuit
Atiyeh Zarifi,
Birgit Stiller,
Moritz Merklein,
Neuton Li,
Khu Vu,
Duk-Yong Choi,
Pan Ma,
Stephen J. Madden,
Benjamin J. Eggleton
Affiliations
Atiyeh Zarifi
Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), Institute of Photonics and Optical Science (IPOS), School of Physics, The University of Sydney, Sydney, NSW 2006, Australia
Birgit Stiller
Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), Institute of Photonics and Optical Science (IPOS), School of Physics, The University of Sydney, Sydney, NSW 2006, Australia
Moritz Merklein
Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), Institute of Photonics and Optical Science (IPOS), School of Physics, The University of Sydney, Sydney, NSW 2006, Australia
Neuton Li
Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), Institute of Photonics and Optical Science (IPOS), School of Physics, The University of Sydney, Sydney, NSW 2006, Australia
Khu Vu
CUDOS, Laser Physics Centre, Research School of Physics and Engineering (RSPE), Australian National University, Canberra, Australian Capital Territory 2601, Australia
Duk-Yong Choi
CUDOS, Laser Physics Centre, Research School of Physics and Engineering (RSPE), Australian National University, Canberra, Australian Capital Territory 2601, Australia
Pan Ma
CUDOS, Laser Physics Centre, Research School of Physics and Engineering (RSPE), Australian National University, Canberra, Australian Capital Territory 2601, Australia
Stephen J. Madden
CUDOS, Laser Physics Centre, Research School of Physics and Engineering (RSPE), Australian National University, Canberra, Australian Capital Territory 2601, Australia
Benjamin J. Eggleton
Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), Institute of Photonics and Optical Science (IPOS), School of Physics, The University of Sydney, Sydney, NSW 2006, Australia
The interaction of optical and acoustic waves via stimulated Brillouin scattering (SBS) has recently reached on-chip platforms, which has opened new fields of applications ranging from integrated microwave photonics and on-chip narrow-linewidth lasers, to phonon-based optical delay and signal processing schemes. Since SBS is an effect that scales exponentially with interaction length, on-chip implementation on a short length scale is challenging, requiring carefully designed waveguides with optimized opto-acoustic overlap. In this work, we use the principle of Brillouin optical correlation domain analysis to locally measure the SBS spectrum with high spatial resolution of 800 μm and perform a distributed measurement of the Brillouin spectrum along a spiral waveguide in a photonic integrated circuit. This approach gives access to local opto-acoustic properties of the waveguides, including the Brillouin frequency shift and linewidth, essential information for the further development of high quality photonic-phononic waveguides for SBS applications.
