Nature - USA (2020-05-14)

Article

AFG

34

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Extended Data Fig. 1 | Pump frequency sweep linearization via the
heterodyne method. a, Setup for pump-laser frequency measurement via
heterodyne beat note and chirp linearization feedback. b, Initial frequency
modulation, when the VCO is driven with a triangular ramp. The measured
frequency is compared with the targeted ideal modulation. The ramp

frequency is 100 kHz. c, Final triangular frequency modulation pattern, after

four iterations. d, Evolution of the root-mean-square (RMS) frequency

deviation during the optimization loop. e, Evolution of the deviation between

measurement and target sweep, at each iteration of the loop.