Fiberized Diamond-Based Vector Magnetometers

We present two fiberized vector magnetic-field sensors, based on nitrogen-vacancy (NV) centers in diamond. The sensors feature sub-nT/ Hz magnetic sensitivity. use commercially available components to construct with a small sensor size, high photon collection, and minimal sensor-sample distance. Both are located at the end of optical fibres sensor-head freely accessible robust under movement. These features make them ideal for mapping fields sensitivity spatial resolution (≤ mm). As demonstration we one map field inside bore ≥100 mT Halbach array. sensing protocol translates microwave spectroscopy data addressing all diamonds axes including double quantum transitions 3D vector.