Phosphate glass useful in high energy lasers

Patent · Tue Dec 31 23:00:00 EST 1991

OSTI ID:868607

Hayden, Yuiko T ^[1]; Guesto-Barnak, Donna ^[2]

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1. Clarks Summit, PA
2. Dupont, PA

A low-or no-silica, low- or no-alkali phosphate glass useful as a laser amplifier in a multiple pass, high energy laser system having a high thermal conductivity, K.sub.90.degree. C. >0.85 W/mK, a low coefficient of thermal expansion, .alpha..sub.20.degree.-300.degree. C. <80.times.10.sup.-7 /.degree.C., low emission cross section, .sigma.<2.5.times.10.sup.-20 cm.sup.2, and a high fluorescence lifetime, .tau.>325 .mu.secs at 3 wt. % Nd doping, consisting essentially of (on an oxide composition basis): wherein Ln.sub.2 O.sub.3 is the sum of lanthanide oxides; .SIGMA.R.sub.2 O is <5, R being Li, Na, K, Cs, and Rb; the sum of Al.sub.2 O.sub.3 and MgO is <24 unless .SIGMA.R.sub.2 O is 0, then the sum of Al.sub.2 O.sub.3 and MgO is <42; and the ratio of MgO to B.sub.2 O.sub.3 is 0.48-4.20.

• 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 5173456
• OSTI ID: 868607
• Country of Publication: United States
• Language: English

Related Subjects

-20
-300
-7
/501/252/
0-
0-20
0-25
0-3
0-31
0-5
10
20
24
30
325
42
48-4
52-72
80
85
90
alkali phosphate
alpha
amplifier
bao
basis
cao
cm
coefficient
composition
composition basis
conductivity
consisting
consisting essentially
cs
degree
doping
emission
energy
energy laser
energy lasers
essentially
expansion
fluorescence
fluorescence lifetime
glass
glass useful
lanthanide
lanthanide oxides
laser
laser amplifier
lasers
lifetime
ln
low-
low-or
mgo
mk
mole
multiple
multiple pass
na
nb
no-alkali
no-silica
oxide
oxide composition
oxides
pass
pbo
phosphate
phosphate glass
ratio
rb
sb
secs
section
sigma
sio
sro
tau
thermal
thermal conductivity
thermal expansion
times
unless
useful
wt
zno