Author/Authors :
Campbell، نويسنده , , J.H and Suratwala، نويسنده , , T.I and Thorsness، نويسنده , , C.B and Hayden، نويسنده , , J.S and Thorne، نويسنده , , A.J and Cimino، نويسنده , , J.M and Marker III، نويسنده , , A.J and Takeuchi، نويسنده , , K and Smolley، نويسنده , , M and Ficini-Dorn، نويسنده , , G.F، نويسنده ,
Abstract :
Continuous melting of phosphate laser glass is being used for the first time to prepare meter-scale amplifier optics for megajoule lasers; a description of the melting process is given. Two key factors in the successful melting of laser glasses are the elimination of damage-causing Pt-inclusions and dehydroxylation of the glass to concentrations less than ∼100 ppmw OH. Oxidizing conditions using 100% O2 or O2 + Cl2 mixtures (at one atmosphere) can be used to dissolve Pt inclusions and the effects of different gases on the dissolution of Pt-inclusions show the trend O2+Cl2>O2≫N2. The removal of hydroxyl groups is achieved by reactive (O2 + Cl2) or non-reactive (O2) gas bubbling; model calculations are used to simulate this process.
