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Precise measurements of Faraday rotation using ac magnetic fields

2008; American Institute of Physics; Volume: 76; Issue: 7 Linguagem: Inglês

10.1119/1.2894529

1943-2909

Ventsislav K. Valev, Jelle Wouters, Thierry Verbiest,

Photonic and Optical Devices

We discuss several important issues concerning the use of a lock-in amplifier and the experimental procedure that need to be addressed to obtain accurate measurements of the Faraday rotation using ac magnetic fields. Our study was conducted on BK7 glass. We show that if electronic interference is avoided and the dependence of the signal on the average light intensity is taken into account, an accurate value of the Verdet constant for thin samples can be determined.