Lockheed Martin Corporation

Laird Nicholas Egan

Jon Carmelo Russo

David Nelson Coar

John B Stetson, Jr

Gregory Scott Bruce

Brian P Boesch

Arul Manickam

Wilbur Lew

Peter G Kaup

Julie Lynne Miller

Jeff D Cammerata

Bryan Neal Fisk

Stephen Michael Sekelsky

Emanuel Solomon Stockman

Thomas J Meyer

James Michael Krause

Elton Pepa

James P Mabry

Colleen Mary Reynolds

Mary Catherine Chih-Li Decristoforo

A system for magnetic detection includes a nitrogen vacancy (NV) diamond material comprising a plurality of NV centers, a radio frequency (RF) excitation source configured to provide RF excitation to the NV diamond material, an optical excitation source configured to provide optical excitation to the NV diamond material, an optical detector configured to receive an optical signal emitted by the NV diamond material, and a controller. The optical signal is based on hyperfine states of the NV diamond material. The controller is configured to detect a gradient of the optical signal based on the hyperfine states emitted by the NV diamond material.

DNV magnetic field detector

A method for detecting a magnetic field acting on a nitrogen vacancy (NV) diamond material comprising a plurality of NV centers may include controlling an optical excitation source and an RF excitation source to apply a pulse sequence comprising two optical excitation pulses and two RF excitation pulses to the NV diamond material, receiving a light detection signal from an optical detector based on an optical signal emitted by the NV diamond material due to the pulse sequence, measuring a first value of the light detection signal at a first reference period, the first reference period being before a period of the light detection signal associated with the two RF excitation pulses provided to the NV diamond material, measuring a second value of the light detection signal at a second reference period, the second reference period being after the period of the light detection signal associated with the two RF excitation pulses provided to the NV diamond material, and computing a measurement signal based on the measured first and second values. Such method may further may further comprise measuring a third value of the light detection signal at a signal period, the signal period being after the first reference period and before the second reference period. Such method may further comprise computing the measurement signal based on a difference between the average of the first and second values and the third value.

Methods for detecting a magnetic field acting on a magneto-optical detect center having pulsed excitation

A system for magnetic anomaly detection is described. The system may include a nitrogen vacancy (NV) diamond material comprising a plurality of NV centers. A controller modulates a first code packet and controls a first magnetic field generator to apply a first time varying magnetic field at the NV diamond material based on the modulated first code packet. The controller modulates a second code packet and control a second magnetic field generator to apply a second time varying magnetic field at the NV diamond material based on the modulated second code packet, wherein the first code packet and the second code packet are binary sequences which have a low cross correlation with each other. The controller determines a magnitude and direction of the magnetic field at the NV diamond material, and determines a magnetic vector anomaly based on the determined magnitude and direction of the magnetic field.

AC vector magnetic anomaly detection with diamond nitrogen vacancies

A system for magnetic detection may include a nitrogen vacancy (NV) diamond material, a radio frequency (RF) excitation source, an optical excitation source, an optical detector, a magnetic field generator, and a controller. The controller may control the excitation sources to apply a first pulse sequence. The controller may receive a first light detection signal due to the first pulse sequence, measure first and second values of the first light detection signal at first and second reference periods, and compute a first measurement. The controller may further control the excitation sources to apply a second pulse sequence, receive a second light detection signal due to the second pulse sequence, measure first and second values of the second light detection signal at first and second reference periods, and compute a second measurement. The first and second measurements may be based on high and low resonance frequencies of the NV diamond material.

Apparatus and method for high sensitivity magnetometry measurement and signal processing in a magnetic detection system

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Philadelphia, PA, United States of America

Laird Nicholas Egan