Modulators – Amplitude modulator – Nonlinear device controlled by modulating signal
Patent
1981-04-17
1984-04-10
Moskowitz, Nelson
Modulators
Amplitude modulator
Nonlinear device controlled by modulating signal
356350, G02F 105, G02B 508
Patent
active
044424140
ABSTRACT:
A magneto-optical phase-modulating device comprising a magneto-optic layer (3) forming part of an optical stack and upon which, in use, light is incident and to which is applied a magnetic field, a layer of magnetic material (6) adjacent the magneto-optic layer (3), and at least two flat, low inductance conductors (9,12) connected in series and disposed one on either side of the layer of magnetic material (6), in use the conductors (9,12) having an electric current applied thereto to provide a magnetic field in the layer of magnetic material (6), which magnetic field is switchable between one direction and the opposite direction by reversing the current in the conductors (9,12) and is of a strength relative to that of the magnetic field applied to the magneto-optic layer (3) such that the latter field is also switched between said one direction and the opposite direction as the field associated with the layer of magnetic material (6) is switched.
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Whitcant et al., "Fabrication of . . . Laser Applications", 2/78, J. A. Phys., vol. 49, #3.
Krebs et al., "Applications of Magneto-Optics in Ring Laser Gyroscopes", 9/80, IEEE Tran. on Mag., vol. MAG 16, #5.
British Aerospace Public Limited Company
Moskowitz Nelson
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