Patent ID: 9726626
Date: 2017-08-08
CPC Classifications: G01N,G01R

Claim:
1. A quantum mechanical measurement device, comprising: a spin ensemble with a precession resonance frequency, a precession resonance period, and an absorption resonance frequency, wherein the spin ensemble is located in a closed container; a first light source for providing a first light at a first wavelength, wherein the first light source is positioned to illuminate and interact optically with the spin ensemble; a detector positioned to detect light from the spin ensemble; and a modulator for modulating a power spectrum of the first light from the first light source, generating a modulating signal as a function of time; wherein a power of the modulating signal in a frequency band between one-third the spin precession resonance frequency and twice the spin precession resonance frequency is less than one-half a total power, not including DC, of the modulating signal, and the power of the modulating signal has a peak at at least one frequency more than twice the spin precession resonance frequency.