FERRIMAGNETIC FARADAY ELEMENTS FOR RING LASERS

FERRIMAGNETIC FARADAY ELEMENTS FOR RING LASERS A ring laser having a Faraday cell for biasing the mode locking region beyond the range of rotation rates of interest. The Faraday element included in the cell is a composite comprising a monocrystalline thin film of a ferrimagnetic material epitaxially...

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Bibliographische Detailangaben
1. Verfasser:	HENRY, RODNEY D
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BASIC ELECTRIC ELEMENTS DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING DEVICES USING STIMULATED EMISSION ELECTRICITY FREQUENCY-CHANGING GYROSCOPIC INSTRUMENTS MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS NAVIGATION NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS SURVEYING TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TESTING
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Beschreibung
Zusammenfassung:	FERRIMAGNETIC FARADAY ELEMENTS FOR RING LASERS A ring laser having a Faraday cell for biasing the mode locking region beyond the range of rotation rates of interest. The Faraday element included in the cell is a composite comprising a monocrystalline thin film of a ferrimagnetic material epitaxially deposited on a non-magnetic single crystal substrate. An antireflection coating on the composite reduces reflections. Reflections are further reduced by the selection of thickness and index of refraction for the layers of the composite. Selected substituents are used in garnet layers to achieve desired magnetic properties, desired indices of refraction, and desired matching of the lattice parameter from layer to layer to minimize internal stresses. Where a composite is provided with a reflection coating on one side thereof, it is adapted to serve as an optical cavity forming corner reflector.