Abstract

Whispering-gallery-mode (WGM) resonator with high-quality factor (Q) is a key platform for a wide range of fields including nonlinear optics, biosensing and quantum photonics. In this work, a packaged silica microrod resonator (PSMR) with ultrahigh-Q of $\bf 9.0\times 10^{8}$ is experimentally demonstrated. Ultrahigh four-wave mixing conversion efficiency of −8.6 dB at a pump power of 27 mW is achieved within this ultrahigh-Q PSMR. Furthermore, this PSMR shows high stability of resonant wavelength shift within 0.032 pm. This work suggests that the PSMR may be a promising platform for optical signal processing and quantum photonics.

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