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A device for magnetic-field angle control in magneto-optical filters using a solenoid-permanent magnet pair [dataset] Open Access

Atomic bandpass filters are used in a variety of applications due to their narrow bandwidths and high transmission at specific frequencies. Predominantly these filters 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 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.

Descriptions

Resource type

Dataset

Contributors

Creator: Alqarni, Sharaa Ahmed S ¹
Contact person: Alqarni, Sharaa Sharaa Ahmed S ¹
Contact person: Hughes, Ifan ¹
Contact person: Higgins, Clare ¹
Contact person: Pizzey, Danielle ¹
Contact person: Briscoe, Jack ¹
Contact person: Logue, Fraser ¹
Contact person: Robertson-Brown, Tom ¹

¹ Durham University, UK

Funder

Engineering and Physical Sciences Research Council
UK Space Agency
Najran University, Najran, KSA

Research methods

Other description

Keyword

Optical filters

Subject

arbitrary magnetic field angle
solenoid-plus-Voigt configuration
solenoid current
magneto-optical filter
rotated-Voigt configuration
Magnetic fields--Measurement

Location

Language

Cited in

Identifier

ark:/32150/r2rb68xb893
doi:10.15128/r2rb68xb893

Rights

Creative Commons Attribution 4.0 International (CC BY)

Publisher

Durham University

Date Created

File Details

Depositor

S. Alqarni

Date Uploaded

11 August 2023, 18:08:56

Date Modified

24 January 2024, 15:01:39

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File format: zip (ZIP Format)

Mime type: application/zip

File size: 315493

Last modified: 2023:08:14 11:32:58+01:00

Filename: Supporting-data-for Arbitrary magnetic field angle control using a solenoid-permanent magnet pair.zip

Original checksum: 7f99ce180887cb8b6fcd70aef46392aa