Leland Stanford Junior University

Michael Digonnet

Herbert J Shaw

Robert L Byer

Martin M Fejer

Shoichi Sudo

Celestino Gaeta

Amado Cordova

Cordova Amado

Methods and apparatus are shown for cladding grown single crystal optical fibers. Neodymium YAG fibers are clad with a high index glass, either melted around the fiber in a trough or extruded over the fiber surface. Lithium niobate fibers are clad through an impregnation process. The lithium niobate fiber is first coated with magnesium oxide and then heated to a temperature and for a time sufficient for the magnesium oxide dopant material to diffuse into the fiber. The dopant lowers the intrinsic refractive indices of the fiber material around its circumference, creating a cladding region around the fiber core. Single crystal fibers clad by these methods and combined with suitable pumping means or with deposited electrodes provide low-loss single mode optical components useful for amplification, electro-optical effects and acousto-optical effects.

Method of cladding single crystal optical fiber

Claddings for single crystal optical fibers and devices and methods and

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Palo Alto, CA, United States of America

Michael Digonnet