Skip to main content

Research Repository

Advanced Search

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

A device for magnetic-field angle control in magneto-optical filters using a solenoid-permanent magnet pair. Thumbnail


Authors

Sharaa Alqarni sharaa.alqarni@durham.ac.uk
PGR Student Doctor of Philosophy

Profile image of Jack Briscoe

Jack Briscoe jack.d.briscoe@durham.ac.uk
PGR Student Doctor of Philosophy

Clare R Higgins

Profile image of Fraser Logue

Fraser Logue fraser.d.logue2@durham.ac.uk
PGR Student Doctor of Philosophy

Thomas G Robertson-Brown



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





You might also like



Downloadable Citations