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arXiv · 1707.09684

Highly localized 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
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Abstract

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 (BOCDA) to locally measure the SBS spectrum with high spatial resolution of 800 {\mu}m and perform a distributed measurement of the Brillouin spectrum along a spiral waveguide in a photonic integrated circuit (PIC). This approach gives access to local opto-acoustic properties of the waveguides, including the Brillouin frequency shift (BFS) and linewidth, essential information for the further development of high quality photonic-phononic waveguides for SBS applications.

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Atiyeh Zarifi, Birgit Stiller, Moritz Merklein, Neuton Li, Khu Vu, Duk-Yong Choi, Pan Ma, Stephen J. Madden, Benjamin J. Eggleton. 2017-07-31. Highly localized Brillouin scattering response in a photonic integrated circuit. https://arxiv.org/abs/1707.09684

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