@article{oai:repo.qst.go.jp:00082171, author = {Felix, M. Stürner and Brenneis, Andreas and Buck, Thomas and Kassel, Julian and Robert, Rölver and Fuchs, Tino and Savitsky, Anton and Suter, Dieter and Grimmel, Jens and Hengesbach, Stefan and Michael, Förtsch and Nakamura, Kazuo and Sumiya, Hitoshi and Shinobu, Onoda and Isoya, Junichi and Jelezko, Fedor and Shinobu, Onoda}, issue = {4}, journal = {Advanced Quantum Technologies}, month = {Feb}, note = {Magnetic field sensors that exploit quantum effects have shown that they can outperform classical sensors in terms of sensitivity enabling a range of novel applications in future, such as a brain machine interface. Negatively charged nitrogen‐vacancy (NV) centers in diamond have emerged as a promising high sensitivity platform for measuring magnetic fields at room temperature. Transferring this technology from laboratory setups into products and applications, the total size of the sensor, the overall power consumption, and the costs need to be reduced and optimized. Here, a fiber‐based NV magnetometer featuring a complete integration of all functional components is demonstrated without using any bulky laboratory equipment. This integrated prototype allows portable measurement of magnetic fields with a sensitivity of 344 pT Hz−1/2.}, title = {Integrated and Portable Magnetometer Based on Nitrogen‐Vacancy Ensembles in Diamond}, volume = {4}, year = {2021} }