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Phosphate glass useful in high power lasers

Patent ·
OSTI ID:867409
 [1];  [2];  [3]
  1. South Abington Township, Lackawana County, PA
  2. Avoca, PA
  3. Hollidaysburg, PA
+ Show Author Affiliations

A low- or no-silica phosphate glass useful as a laser medium and having a high thermal conductivity, K.sub.90.degree. C. >0.8 W/mK, and a low coefficient of thermal expansion, .alpha..sub.20.degree.-40.degree. C. <80.times.10.sup.-7 /.degree.C., consists essentially of (on a batch composition basis): the amounts of Li.sub.2 O and Na.sub.2 O providing an average alkali metal ionic radius sufficiently low whereby said glass has K.sub.90.degree. C. >0.8 W/mK and .alpha..sub.20.degree.-40.degree. C. <80.times.10.sup.-7 /.degree.C., and wherein, when the batch composition is melted in contact with a silica-containing surface, the final glass composition contains at most about 3.5 mole % of additional silica derived from such contact during melting. The Nd.sub.2 O.sub.3 can be replaced by other lasing species.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-48
Assignee:
Schott Glass Technologies, Inc. (Duryea, PA)
Patent Number(s):
US 4929387
OSTI ID:
867409
Country of Publication:
United States
Language:
English

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