Athermal laser glass composition
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United States of America Patent
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Jun 8, 1982
Grant Date -
N/A
app pub date -
Dec 3, 1980
filing date -
Dec 3, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A phosphate laser glass in which the optical path length is substantially independent of temperature, or 'athermal', particularly under rapid pulsing, and chemically stable, while providing high gain. The base glass composition comprises, in mole percent, 55 to 70% P.sub.2 O.sub.5, 3 to 15% of an alkali metal oxide, preferably Li.sub.2 O plus K.sub.2 O, 20 to 30% BaO and 0.5 to 5% Al.sub.2 O.sub.3. Up to 15% of the BaO may be replaced by CaO, SrO or MgO and part of the Al.sub.2 O.sub.3 may be replaced by Nd.sub.2 O.sub.3. The total Al.sub.2 O.sub.3 plus Nd.sub.2 O.sub.3 is 4 mole percent .+-.1.5%. The laser glass composition also includes a laseable component, preferably Nd.sub.2 O.sub.3 and preferably includes a solarization inhibitor.
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