Sharaa Alqarni sharaa.alqarni@durham.ac.uk
PGR Student Doctor of Philosophy
A device for magnetic-field angle control in magneto-optical filters using a solenoid-permanent magnet pair.
Alqarni, Sharaa A; Briscoe, Jack D; Higgins, Clare R; Logue, Fraser D; Pizzey, Danielle; Robertson-Brown, Thomas G; Hughes, Ifan G
Authors
Jack Briscoe jack.d.briscoe@durham.ac.uk
PGR Student Doctor of Philosophy
Clare R Higgins
Fraser Logue fraser.d.logue2@durham.ac.uk
PGR Student Doctor of Philosophy
Dr Danielle Pizzey danielle.boddy@durham.ac.uk
Chief Experimental Officer
Thomas G Robertson-Brown
Professor Ifan Hughes i.g.hughes@durham.ac.uk
Professor
Abstract
Atomic bandpass filters are used in a variety of applications due to their narrow bandwidths and high transmission at specific frequencies. Predominantly, these filters are in the Faraday (Voigt) geometry, using an applied axial (transverse) magnetic field with respect to the laser propagation direction. Recently, there has been interest in filters realized with arbitrary-angle magnetic fields, which have been made by rotating permanent magnets with respect to the k-vector of the interrogating laser beam. However, the magnetic field angle achievable with this method is limited as field uniformity across the cell decreases as the rotation angle increases. In this work, we propose and demonstrate a new method of generating an arbitrary-angle magnetic field, using a solenoid to produce a small, and easily alterable, axial field, in conjunction with fixed permanent magnets to produce a large transverse field. We directly measure the fields produced by both methods, finding them to be very similar over the length of the vapor cell. We then compare the transmission profiles of filters produced using both methods, again finding excellent agreement. Finally, we demonstrate the sensitivity of the filter profile to changing magnetic field angle (solenoid current), which becomes easier to exploit with the much improved angle control and precision offered by our new design.
Citation
Alqarni, S. A., Briscoe, J. D., Higgins, C. R., Logue, F. D., Pizzey, D., Robertson-Brown, T. G., & Hughes, I. G. (2024). A device for magnetic-field angle control in magneto-optical filters using a solenoid-permanent magnet pair. Review of Scientific Instruments, 95(3), Article 035103. https://doi.org/10.1063/5.0174264
Journal Article Type | Article |
---|---|
Acceptance Date | Feb 7, 2024 |
Online Publication Date | Mar 4, 2024 |
Publication Date | Mar 4, 2024 |
Deposit Date | Apr 5, 2024 |
Publicly Available Date | Apr 5, 2024 |
Journal | Review of Scientific Instruments |
Print ISSN | 0034-6748 |
Electronic ISSN | 1089-7623 |
Publisher | American Institute of Physics |
Peer Reviewed | Peer Reviewed |
Volume | 95 |
Issue | 3 |
Article Number | 035103 |
DOI | https://doi.org/10.1063/5.0174264 |
Public URL | https://durham-repository.worktribe.com/output/2346120 |
Files
Published Journal Article
(6.5 Mb)
PDF
Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/
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