Laser threshold magnetometry with a combined laser diode, nitrogen-vacancy center cavity
Nitrogen-vacancy centers (NV) in diamond are promising quantum systems for magnetic field sensing. The sensitivity and the linearity of such a quantum sensor can be greatly improved by using stimulated emission of the NV centers in the concept of laser threshold magnetometry (LTM), which is projected to reach the fT/sqrt(Hz) regime. Previous implementations of NV centers in optical cavities relied on external seed lasers, pulsed operation, or sensing via NVabsorption. In our work, we combine the NV centers with a second gain medium, a laser diode, within the same cavity, achieving self-sustainable continuous-wave lasing. This approach compensates the intrinsic losses of the cavity and the diamond, through a fixed additional gain below the threshold of the laser system. A continuous-wave laser threshold and a linewidth narrowing is observed with increasing pump power on the NV centers of the combined laser system. An improved laser system shows a magnetic field-dependent laser threshold, which is the basis for improved-sensitivity NV magnetometry via LTM.
Authors
- Marco Capelli
- Tingpeng Luo (ORCID: https://orcid.org/0000-0001-5486-4064)
- R. Quay (ORCID: https://orcid.org/0000-0002-3003-0134)
- Jan Jeske (ORCID: https://orcid.org/0000-0003-3532-506X)
- Xavier Vidal (ORCID: https://orcid.org/0000-0001-8026-2016)
- Brant C. Gibson (ORCID: https://orcid.org/0000-0002-7109-2796)
- Joachim Sacher (ORCID: https://orcid.org/0000-0002-6763-2198)
- Guillermo Nava Antonio (ORCID: https://orcid.org/0000-0003-2813-2841)
- Takeshi Ohshima (ORCID: https://orcid.org/0000-0002-7850-3164)
- Felix A. Hahl (ORCID: https://orcid.org/0000-0001-5861-0547)
- Lukas Lindner (ORCID: https://orcid.org/0000-0002-5814-220X)
- Marcel Rattunde (ORCID: https://orcid.org/0009-0006-4039-1570)
- A.M. Zaitsev
- Andrew D. Greentree (ORCID: https://orcid.org/0000-0002-3505-9163)
- Florian Schall
- Yves Rottstaedt
Institutions
- College of Staten Island (US)
- Tohoku University (JP)
- University of Cambridge (GB)
- Gemological Institute of America (US)
- Fraunhofer Institute for Applied Solid State Physics (DE)
- Tecnalia (ES)
- National Institutes for Quantum Science and Technology (JP)
- Association of Electronic and Information Technologies (ES)
- RMIT University (AU)
Publication Details
- Published
- 2025-03-19
- DOI
- https://doi.org/10.1117/12.3042797
- Primary Topic
- Laser Design and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00