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The UV transmission properties of quartz can be modified by the incorporation of a dopant in the material. This dopant usually takes the form of cerium or titanium oxides. The quartz still appears clear but the UV transmission has been modified.
This modification is desirable when potentially damaging UV from the flashlamp must be eliminated. This includes the elimination of ozone or he prevention of UV damage to Nd:YAG rods, reflectors, plastics and “O” rings.
Cerium doped quartz is a clear fused quartz doped with cerium oxide. This material has significant applications in flashlamps for laser pumping. The UV cut off at approximately 380 nanometers ensures that harmful UV is eliminated from the pump chamber.
The UV absorption is accompanied by fluorescence in the visible spectrum and an increase in laser efficiency can be expected as some of it falls in the absorption bands of Nd:YAG.
Cerium doped quartz has very stable material properties throughout lamp life making it a very desirable envelope material for flashlamps.
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