Thomson-csf

Roger Gaudry

Gerard Doriath

Georges Hepner

A magnetometer measuring head is divided into two separate sub-units, including a first sub-unit including means for transmission and detection of polarized light is coupled via a fibre to a second sub-unit comprising a thin layer of magnetic material within which is guided the light wave transmitted by the fibre. The coupling with the fibre is established via the edge, the opposed end of the layer being provided with a mirror so that the guided wave follows an outgoing and returning path before being retransmitted to the detection means which measure the rotation of the polarization of the light caused by Faraday effect.

Magnetometer probe using a thin-film magnetic material as a

The invention relates to magnetometers making it possible to measure a magnetic field by the Faraday effect in a thin YIG layer which involves taking a YIG layer which is sufficiently thick to permit a multimode transmission of the polarized light beam, as well as the entrance and exit of said beam from the edge of the layer. This device makes it possible to produce a magnetometer head, whose elements are integrated on a substrate and whose volume is approximately 1 cm.sup.3.

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Paris, France

Roger Gaudry