A fiber integrated N-V diamond magnetometer compatible with commercial endoscopic systems
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866911222491774976 |
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| author | Singh, Satbir Lee, Hyunjong Nguyen, Nhu Anh Kang, Seonghyeon Shim, Jeong Hyun Oh, Sangwon Lee, Kwang-Geol |
| author_facet | Singh, Satbir Lee, Hyunjong Nguyen, Nhu Anh Kang, Seonghyeon Shim, Jeong Hyun Oh, Sangwon Lee, Kwang-Geol |
| contents | Nitrogen-vacancy (N-V) center in diamond provides a robust, solid-state platform for magnetic field measurements at room temperature. To harness its potential in inspecting inaccessible regions, here we present a compact endoscopic configuration of an N-V diamond-based magnetometer. The endoscopic magnetometer was developed by integrating a large-core optical fiber with a bulk N-V diamond for laser excitation and photoluminescence (PL) collection. The diamond and fiber were specially shaped to enhance PL collection through the fiber. Additionally, a 3D-printed endoscope head was employed to facilitate alignment of the bias magnetic field along the N-V axis. A magnetic field sensitivity of approximately 3 nT/Hz$^{1/2}$ was achieved by using cw-magnetometry measurements. The endoscope diameter was restricted to 10 mm to match the dimensions of most commercial endoscopes. The magnetic field non-uniformity caused by the small separation between the diamond and the magnet in the endoscope head limited the overall sensitivity. It could be further improved to 0.85 nT/Hz$^{1/2}$ by using a magnet placed at a sufficient distance outside the endoscope head. Our endoscopic design is mechanically stable and provides additional opportunities for integrating other functionalities into the probe head as needed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_17807 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A fiber integrated N-V diamond magnetometer compatible with commercial endoscopic systems Singh, Satbir Lee, Hyunjong Nguyen, Nhu Anh Kang, Seonghyeon Shim, Jeong Hyun Oh, Sangwon Lee, Kwang-Geol Instrumentation and Detectors Applied Physics Nitrogen-vacancy (N-V) center in diamond provides a robust, solid-state platform for magnetic field measurements at room temperature. To harness its potential in inspecting inaccessible regions, here we present a compact endoscopic configuration of an N-V diamond-based magnetometer. The endoscopic magnetometer was developed by integrating a large-core optical fiber with a bulk N-V diamond for laser excitation and photoluminescence (PL) collection. The diamond and fiber were specially shaped to enhance PL collection through the fiber. Additionally, a 3D-printed endoscope head was employed to facilitate alignment of the bias magnetic field along the N-V axis. A magnetic field sensitivity of approximately 3 nT/Hz$^{1/2}$ was achieved by using cw-magnetometry measurements. The endoscope diameter was restricted to 10 mm to match the dimensions of most commercial endoscopes. The magnetic field non-uniformity caused by the small separation between the diamond and the magnet in the endoscope head limited the overall sensitivity. It could be further improved to 0.85 nT/Hz$^{1/2}$ by using a magnet placed at a sufficient distance outside the endoscope head. Our endoscopic design is mechanically stable and provides additional opportunities for integrating other functionalities into the probe head as needed. |
| title | A fiber integrated N-V diamond magnetometer compatible with commercial endoscopic systems |
| topic | Instrumentation and Detectors Applied Physics |
| url | https://arxiv.org/abs/2510.17807 |