Figure 9: Schematic view of light modulation by perfectly reflecting mirror motion. An initially
monochromatic laser field with frequency gets reflected from the mirror
that commits slow (compared to optical oscillations) motion (blue line) under the action of
external force . Reflected the light wave phase is modulated by the mechanical motion so that the
spectrum of the outgoing field contains two sidebands carrying all the information about
the mirror motion. The left panel shows the spectral representation of the initial monochromatic
incident light wave (upper plot), the mirror mechanical motion amplitude spectrum (middle plot)
and the spectrum of the phase-modulated by the mirror motion, reflected light wave (lower plot).
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