Patent ID: 8890520

Claim:
A method for examining the nuclear magnetic resonance in a sample volume, contained in a measuring volume, said method comprising the steps of: a) generating at least one packet of laser pulses with the aid of an excitation laser; b) radiating the measuring volume with the at least one packet of laser pulses so that the at least one packet of laser pulses on the measuring volume when a quasi-static magnetic field appears within the measuring volume, thereby causing the sample volume within the measuring volume to transmit a response signal to the at least one packet of laser pulses, provided the resonance conditions for nuclear spins therein are met; and c) receiving the response signal from the sample volume in at least one detector, wherein the quasi-static magnetic field within the measuring volume is is generated by i) admitting the measuring volume with a low-frequency first laser beam for which the wavelength exceeds the wavelength of the excitation laser by at least a factor of 10 2 , thereby generating in the measuring volume a periodically changeable magnetic field with a flux density B 01 and causing the amplitude of the magnetic field within the measuring volume to measure at least 90% of its maximum value, or ii) admitting the measuring volume with a high-frequency first laser beam for which the frequency exceeds the frequency of the excitation laser by at least a factor of 10 2 , wherein the laser beam is subjected to a rectification prior to impinging on the measuring volume, thereby generating in the measuring volume a quasi-static magnetic field which has over at least 10 cycles an effective average constant flux density B 01eff for which the spatial and time average is not equal to zero.