Arrangement for noise reduction in optical magnetometer, has photodetector staying in connection with frequency generator, where output signal is supplied ...


Ontology type: sgo:Patent     


Patent Info

DATE

2010-12-02T00:00

AUTHORS

Schultze, Volkmar, Dipl.-Phys. Dr.

ABSTRACT

The invention relates to an arrangement for noise reduction in the case of optical magnetometers. The object, the effect of the noise of the pump light source and, in the case of a corresponding circuit design, of the magnetic field on the noise limited magnet field resolution of optical magnetometers. to be reduced and the intrinsic, coarse-ground rausch limited value, is achieved in that with light from the same light source (1) is acted upon, by means of a second alkali steam cell (3) in a the magnetometer parallel branch is associated, wherein this second alkali steam cell (3) one of the first alkali steam cell (2a) is exposed to different magnetic field detecting magnetic field, which is also a photodetector (3a) and is arranged downstream of the amplified signals of the first photodetector (4a) in the magneto-optical meters branch and of the second photodetector (3a), and immediately thereafter, an electronic difference former (5) and only then be supplied to the output signal on the this magnetometer (m1) associated phase detector (6a) is supplied with the frequency generator (7a) which is in connection branch for the magneto meter is associated with the alkali steam cell (2a) with the defined adjustable alternating magnetic field (b11(1)) applied to. More... »

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