Fig. 5: Superconducting microwave cavity performance.
From: Bidirectional interconversion of microwave and light with thin-film lithium niobate

a Microwave reflection spectrum of the device (A) in a closed copper box (B) in a closed copper box with wire bonds (C) packaged with fiber-array for conversion measurement. b The fitted intrinsic microwave quality factors. The error bars show the standard derivations of the measurements.