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US 6,714,578 B2Granted
Calcium gallium sulphide (CaGa2S4) as a high gain erbium host
OwnerScott D. Setzler, Peter G. Schunemann +1inventors
InventorsScott D. Setzler, Peter G. Schunemann, Thomas M. Pollak
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Abstract
The present invention uses a novel crystal host to minimize parasitic upconversion and lifetime quenching processes by increasing the distance between active dopant ions in the matrix. As a result, erbium that could previously only be useful at low levels may now be incorporated at much higher concentrations without adverse effects. In addition, this host has long excited-state-lifetimes, making it more effective as an energy storage device for pulsed laser applications.
Claims12
A laser system comprising:
- a crystal of calcium gallium sulphide doped with Erbium;
- and
- a pump source positioned to energize the crystal wherein the crystal will emit energy in the spectral region of 1.50 to 1.70 microns.
A method of generating an optical energy comprising:
- energizing a crystal of calcium gallium sulphide doped with Erbium wherein the crystal will emit energy in the spectral region of 1.50 to 1.70 microns.
Dependencies are inferred from the claim text.