Interferometric Faraday effect magnetic field measurements
published by
the Bethel University
The Faraday effect has ongoing applications including optical isolators and measuring dynamic magnetic fields in lab or space-based plasmas. A direct interferometric study of the circular birefringence underlying the Faraday effect provides a powerful platform for creative work in the undergraduate optics laboratory and makes clear the underlying physics. This experiment introduces a heterodyne interferometer for determining phase shifts between left- and righthanded circular polarizations as they pass through a substance in the direction of the magnetic field. Phase shifts due to magnetic fields within a commercially available 1.3 cm long terbium gallium garnet (TGG) crystal (after 3 passes of the 633 nm laser beam) can be plotted as a function of time – corresponding to B(t) down to the mT range. In the case of an broader advanced lab project format involving several weeks of time, the experiment may also provide a venue for introducing the use of heterodyne interferometers in measuring rapidly changing optical path length changes on the nanometer scale.
<a href="https://advlabs.aapt.org/items/detail.cfm?ID=13826">Bethel University. Interferometric Faraday effect magnetic field measurements. St. Paul: Bethel University, December 8, 2015.</a>
Interferometric Faraday effect magnetic field measurements (Bethel University, St. Paul, 2014), <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13826&DocID=4244>.
Interferometric Faraday effect magnetic field measurements. (2015, December 8). Retrieved December 2, 2024, from Bethel University: https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13826&DocID=4244
Bethel University. Interferometric Faraday effect magnetic field measurements. St. Paul: Bethel University, December 8, 2015. https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13826&DocID=4244 (accessed 2 December 2024).
@misc{
Title = {Interferometric Faraday effect magnetic field measurements},
Publisher = {Bethel University},
Volume = {2024},
Number = {2 December 2024},
Month = {December 8, 2015},
Year = {2014}
}
%T Interferometric Faraday effect magnetic field measurements %D December 8, 2015 %I Bethel University %C St. Paul %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13826&DocID=4244 %O application/pdf
%0 Electronic Source %D December 8, 2015 %T Interferometric Faraday effect magnetic field measurements %I Bethel University %V 2024 %N 2 December 2024 %8 December 8, 2015 %9 application/pdf %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13826&DocID=4244
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