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Batch-processed high-Q integrated lithium-niobate-on-insulator ridge waveguide whispering-gallery resonators

: Wolf, Richard; Zappe, Hans; Buse, Karsten; Breunig, Ingo


Institute of Electrical and Electronics Engineers -IEEE-:
Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, CLEO/Europe-EQEC 2017 : 25-29 June 2017, Munich, Germany
Piscataway, NJ: IEEE, 2017
ISBN: 978-1-5090-6736-7
ISBN: 978-1-5090-6737-4
Conference on Lasers and Electro-Optics Europe (CLEO) <2017, Munich>
European Quantum Electronics Conference (EQEC) <2017, Munich>
Fraunhofer IPM ()
Q-Factor; optical waveguide; optical resonators; lithium niobate; frequency conversion; ultrafast optic

Lithium niobate whispering-gallery resonators (WGRs) show high intensity enhancement due to small mode volumes and high Q-factors. With bulk WGRs, shaped by diamond-blade-cutting tools followed by surface polishing, Q-factors in the range of 1011 have been demonstrated, which make them of significant interest for e.g. nonlinear-optical frequency conversion [1]. However, WGRs are still rare in commercial products due to the serial and thus expensive fabrication. Thus integration of WGRs on chip level became of great interest in the past years.