Coherence calibration: shared delay axis, independent y scales05010015000.20.40.60.81exp fit, T1 = 62 usT1delay (us)excited-state populationT1 relaxationmeasuredexp fit, T1 = 62 us05010015000.20.40.60.81envelope, T2 = 41 usdelay (us)Ramsey fringes at 75 kHz detuning (T2 / 2T1 = 0.33)envelope, T2 = 41 usmeasuredCoherence calibration: shared delay axis, independent y scales