Fig. 6: Frequency response of 13C magnetometer.
From: High field magnetometry with hyperpolarized nuclear spins
A Spectral response of an chirped AC field (inset) where frequency is swept between 1 and 4 kHz (\(\Delta {{{{{{{\mathcal{B}}}}}}}}=3\)kHz), (green shaded region) in 20 s. Plotted is the resulting Fourier transform intensity of So (averaged over 100 shots) revealing profile of sensor frequency response. Data is smoothed over 10 Hz for clarity. Primary and secondary harmonic responses are marked. Dashed lines denote \({f}_{{{{{{{{\rm{res}}}}}}}}}\) and \(2{f}_{{{{{{{{\rm{res}}}}}}}}}\). B Zoom into primary harmonic response. Points show cusp-like primary harmonic response with a linewidth of ≈ 60 Hz about \({f}_{{{{{{{{\rm{res}}}}}}}}}=2.78\) kHz (dashed line). Orange solid line is a spline fit guide to the eye. C Zoom into secondary harmonic response showing an approximately Gaussian profile, here with a linewidth of ≈ 313 Hz, centered at 2\({f}_{{{{{{{{\rm{res}}}}}}}}}\).
