Ultrahigh-Q Packaged Microrod Resonator for Efficient FWM Wavelength Conversion

We fabricate a packaged microrod resonator with ultrahigh quality factor of 9.0 × 10
⁸
. Based on the packaged microrod resonator, we demonstrate the four-wave mixing wavelength conversion with -4.81 dB conversion efficiency (CE) at 21 mW pump power and 3.43 μW signal power. To the best of our knowledge, a CE enhancement of about 8 dB is obtained compared with previous works realized in the WGM resonators.