Figure 6

Left: Observed resonance curve for the \(^2{\mathrm{S}}_{1/2}{-}^2{\mathrm{P}}_{{3}/2}\) transition at a cooler current of 218 mA. Right: Measured resonance voltages as a function of the cooler current for the \(^2{\mathrm{S}}_{1/2}{-}^2{\mathrm{P}}_{{3}/2}\) transition.