Gallium lanthanum sulfide glasses and optical waveguides and devices using such glasses
AssigneeUniversity of Southampton
InventorsDaniel William Hewak, Mohammed Khawar Arshad Mairaj
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Abstract
A new and improved hybrid of Ga:La:S (GLS) glass is provided, namely a glass comprising gallium sulfide, lanthanum oxide, and at least 2 mol % lanthanum fluoride. The Ga:La:S:O:F (GLSOF) glass retains the important properties of the Ga:La:S system, while introducing improved thermal stability and spectroscopic properties. In addition, GLSOF glasses are non-toxic. The glass formation region for GLSOF has been carefully evaluated with compositional variations. It has been identified that an area of glass formation as indicated by circles, is a new and previously undiscovered glass formation region.
Claims25
A glass comprising gallium sulfide, lanthanum oxide, and at least 2 mol % lanthanum fluoride.
An optical waveguide comprising a clad of a clad glass comprising gallium, lanthanum and sulfur and a core of core glass comprising gallium, lanthanum, sulfur, oxygen and fluorine.
An optical waveguide comprising a clad of glass comprising gallium sulfide and lanthanum oxide, and a core of glass comprising gallium sulfide, lanthanum oxide and lanthanum fluoride.
An optical fiber preform comprising a core and a clad, wherein the clad comprises a clad glass comprising:
- (a) gallium sulfide
- (b) lanthanum oxide
- the core comprises a core glass comprising:
- (c) gallium sulfide
- (d) lanthanum oxide and
- (e) lanthanum fluoride.
A method of fabricating an optical fiber, comprising:
- (a) providing a sample of glass comprising gallium sulfide, lanthanum oxide and lanthanum fluoride;
- and
- (b) drawing the sample into an optical fiber.
Dependencies are inferred from the claim text.