This PDF file includes:

• section S1. Stationary spin-echo signal
  
• section S2. Effect of laser pulse duration
  
• section S3. Time-dependent optical pumping of the NV
  
• section S4. Drift during experiments
  
• fig. S1. Stationary spin-echo signal from NV1.
  
• fig. S2. Fluorescence smearing due to longer pulse durations.
  
• fig. S3. Estimation of motor period jitter.
  
• fig. S4. Dependence of NV contrast on delay time.

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