Figure 7: Calibration of the noise levels of the measurement system.
From: Spatial mapping of multimode Brownian motions in high-frequency silicon carbide microdisk resonators
Orange curve: Spectrum analyser only. Magenta curve: Spectrum analyser+PD (no incident photons). Blue curve: Spectrum analyser+PD (no light)+shot noise (calculation). Red curve: Spectrum analyser+PD+laser (shot noise and electrical noise)+device motion (thermomechanical noise). Labels 1−6 indicate the observed different thermomechanical resonance modes from a typical multimode SiC disk resonator.
