Distributed Quantum Fiber Magnetometry
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2019-05-17 |
| Journal | Laser & Photonics Review |
| Authors | Shai Maayani, Christopher Foy, Dirk Englund, Yoel Fink |
| Institutions | Massachusetts Institute of Technology |
| Citations | 44 |
Abstract
Section titled âAbstractâAbstract Nitrogenâvacancy (NV) quantum magnetometers offer exceptional sensitivity and longâterm stability. However, their use to date in distributed sensing applications, including remote detection of ferrous metals, geophysics, and biosensing, is limited due to the need to combine optical, microwave (MW), and magnetic excitations into a single system. Existing approaches have yielded localized devices but not distributed capabilities. In this study, a continuous systemâinâaâfiber architecture is reported, which enables distributed magnetic sensing over extended lengths. Key to this realization is a thermally drawn fiber that has hundreds of embedded photodiodes connected in parallel and a hollow optical waveguide that contains a fluid with NV diamonds. This fiber is placed in a larger coaxial cable to deliver the required MW excitation. This distributed quantum sensor is realized in a waterâimmersible 90âmâlong cable with 102 detection sites. A sensitivity of 63 ± 5 nT Hz â1/2 per site, limited by laser shot noise, is established along a 90 m test section. This fiber architecture opens new possibilities as a robust and scalable platform for distributed quantum sensing technologies.
Tech Support
Section titled âTech SupportâOriginal Source
Section titled âOriginal SourceâReferences
Section titled âReferencesâ- 1993 - Distributed optical fiber sensors. Distributed and Multiplexed Fiber Optic Sensors II, Vol. 1797