Measurements of magnetic fields by a ring laser

Authors :: Zhang, J.
Feng, T.
Zhang, S.
Jin, G.
Source :: Applied Optics. Oct 20, 1992, Vol. 31 Issue 30, p6459, 4 p.
Publication Year :: 1992
Abstract: The principle of measuring magnetic fields with a ring laser system is discussed. The main source of error, the Zeeman effect, is studied, and a corresponding technique to reduce it is described. An experimental setup is developed with a Faraday cell of a large product of the Verdet constant and the length. The experimental device obtains a sensitivity of 0.5 nT and a stability of 2 nT.