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Title: Phosphate glass useful in high power lasers

Abstract

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.

Inventors:
 [1];  [2];  [3]
  1. (South Abington Township, Lackawana County, PA)
  2. (Avoca, PA)
  3. (Hollidaysburg, PA)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
867409
Patent Number(s):
US 4929387
Assignee:
Schott Glass Technologies, Inc. (Duryea, PA) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
phosphate; glass; useful; power; lasers; low-; no-silica; laser; medium; thermal; conductivity; 90; degree; mk; coefficient; expansion; alpha; 20; -40; 80; times; 10; -7; consists; essentially; batch; composition; basis; mole; 45-70; 15-35; na; 0-10; 10-15; 01-6; 0-6; sio; 0-8; mgo; 0-18; cao; 0-15; sro; 0-9; bao; zno; amounts; providing; average; alkali; metal; ionic; radius; sufficiently; whereby; melted; contact; silica-containing; surface; final; contains; additional; silica; derived; melting; replaced; lasing; species; power lasers; composition contains; thermal conductivity; thermal expansion; alkali metal; glass composition; consists essentially; power laser; laser medium; phosphate glass; composition basis; glass useful; ionic radius; batch composition; /252/501/

Citation Formats

Hayden, Joseph S., Sapak, David L., and Ward, Julia M. Phosphate glass useful in high power lasers. United States: N. p., 1990. Web.
Hayden, Joseph S., Sapak, David L., & Ward, Julia M. Phosphate glass useful in high power lasers. United States.
Hayden, Joseph S., Sapak, David L., and Ward, Julia M. Mon . "Phosphate glass useful in high power lasers". United States. https://www.osti.gov/servlets/purl/867409.
@article{osti_867409,
title = {Phosphate glass useful in high power lasers},
author = {Hayden, Joseph S. and Sapak, David L. and Ward, Julia M.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1990},
month = {Mon Jan 01 00:00:00 EST 1990}
}

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