Extended Data Fig. 1: Experimental setup.
From: Vernier microcombs for integrated optical atomic clocks
CW: continuous wave. AWG: arbitrary waveform generator. VCO: voltage-controlled oscillator. SSB modulator: single sideband modulator. EDFA: erbium-doped fiber amplifier. IM: intensity modulator. TDFA: thulium-doped fiber amplifier. PC: polarization controller. WDM: wavelength-division multiplexing. DWDM: dense wavelength-division multiplexing. iso: isolator. SOA: semiconductor optical amplifier. BPF: bandpass filter. TBPF: tunable bandpass filter. PNTS: phase noise test set.
