Journal
OPTICS EXPRESS
Volume 27, Issue 16, Pages 22246-22253Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.27.022246
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Funding
- Defense Advanced Research Projects Agency (DARPA) [W31P4Q-15-1-0006, HR0011-16-C0118]
- Air Force Office of Scientific Research (AFOSR) [FA9550-15-1-0029]
- Army Research Office (ARO) [W911NF-14-1-0563]
- National Science Foundation (NSF) [EFMA-1640959]
- David and Lucile Packard Foundation
- KIST institutional programs [2E29160, 2E29580]
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In optical microresonators, stimulated Raman scattering (SRS) competes with four-wave mixing process and impact Kerr comb generation. Here, we demonstrate Raman frequency combs in poly-crystalline aluminum nitride (AlN) microring resonators. The Raman shifts at transverse-electric (TE) and transverse-magnetic (TM) polarizations are characterized from AlN straight waveguides using backscattering geometries. In poly-crystalline AlN microring resonators, the frequency matching of cavity resonances with broad Raman gain enhances the SRS and leads to Raman-assisted frequency combs. As a result, comb lines near Raman scattering regions of AlN are generated. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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