Four-wave mixing parametric oscillation and frequency comb generation at visible wavelengths in a silica microbubble resonator

Yong Yang, Xuefeng Jiang, Sho Kasumie, Guangming Zhao, Linhua Xu, Jonathan M. Ward, Lan Yang, Síle Nic Chormaic

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

Frequency comb generation in microresonators at visible wavelengths has found applications in a variety of areas such as metrology, sensing, and imaging. To achieve Kerr combs based on four-wave mixing in a microresonator, dispersion must be in the anomalous regime. In this Letter, we demonstrate dispersion engineering in a microbubble resonator (MBR) fabricated by a two-CO2 laser beam technique. By decreasing the wall thickness of the MBR to 1.4 μm, the zero dispersion wavelength shifts to values shorter than 764 nm, making phase matching possible around 765 nm. With the optical Q-factor of the MBR modes being greater than 107 , four-wave mixing is observed at 765 nm for a pump power of 3 mW. By increasing the pump power, parametric oscillation is achieved, and a frequency comb with 14 comb lines is generated at visible wavelengths.

Original languageEnglish
Pages (from-to)5266-5269
Number of pages4
JournalOptics Letters
Volume41
Issue number22
DOIs
StatePublished - Nov 15 2016

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