Quite a bit of new material and fabrication papers related to Kerr frequency combs and integrated photonics in general:
- Wilson, D. J. et al. Integrated gallium phosphide nonlinear photonics. Nat. Photonics 1–6 (2019) doi:10.1038/s41566-019-0537-9.
- Ye, Z., Twayana, K., Andrekson, P. A. & Torres-Company, V. High-Q Si3N4 microresonators based on a subtractive processing for Kerr nonlinear optics. Opt. Express, OE 27, 35719–35727 (2019).
Below one more paper on integrated photonics with aluminum nitride on sapphire and one paper integrating silicon nitride microresonators with laser gain to build a CW laser with some frequency comb ambitions.
- Sun, Y. et al. Ultrahigh Q microring resonators using a single-crystal aluminum-nitride-on-sapphire platform. Opt. Lett., OL 44, 5679–5682 (2019).
- Boller, K.-J. et al. Hybrid integrated semiconductor lasers with silicon nitride feedback circuits. arXiv:1911.10820 (2019).
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