Phosphate glass useful in high power lasers
First Claim
1. A low- or no-silica phosphate glass useful as a high average power laser medium and having a high thermal conductivity, K90°
- C >
0.8 W/mK, and a low coefficient of thermal expansion, α
20°
-300°
C <
90×
10-7 /°
C, consisting essentially of (on a batch composition basis);
space="preserve" listing-type="tabular">______________________________________ Mole % ______________________________________ P.sub.2 O.sub.5 45-70 Li.sub.2 O 0-14 Na.sub.2 O 0-12 K.sub.2 O 0-6 Al.sub.2 O.sub.3 9-15 lasable ion-containing oxide 0.01-6 La.sub.2 O.sub.3 0-6 SiO.sub.2 0-8 B.sub.2 O.sub.3 0-8 MgO 6-30 CaO 0-15 SrO 0-9 BaO 0-9 ZnO 0-15 Σ
MgO + Li.sub.2 O 20-30 ______________________________________ whereby said glass has K90°
C >
0.8 W/mK and α
20-300°
C <
90×
10-7 /°
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.
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Accused Products
Abstract
A low- or no-silica phosphate glass useful as a high average power laser medium and having a high thermal conductivity, K90° C. >0.8 W/mK, and a low coefficient of thermal expansion, α20°-300° C. <90×10-7 /°C., consisting essentially of (on a batch composition basis):
______________________________________
Mole % ______________________________________ P2 O5 45-70 Li2 O 0-14 Na2 O 0-12 K2 O 0-6 Al2 O3 9-15 Nd2 O3 0.01-6 La2 O3 0-6 SiO2 0-8 B2 O3 0-8 MgO 6-30 CaO 0-15 SrO 0-9 BaO 0-9 ZnO 0-15 Σ MgO + Li2 O 20-30 ______________________________________
whereby said glass has K90° C. >0.8 W/mK and α20°-300° C. <90×10-7 /°C. The Nd2 O3 can be replaced by other lasing species.
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Citations
30 Claims
-
1. A low- or no-silica phosphate glass useful as a high average power laser medium and having a high thermal conductivity, K90°
- C >
0.8 W/mK, and a low coefficient of thermal expansion, α
20°
-300°
C <
90×
10-7 /°
C, consisting essentially of (on a batch composition basis);
space="preserve" listing-type="tabular">______________________________________ Mole % ______________________________________ P.sub.2 O.sub.5 45-70 Li.sub.2 O 0-14 Na.sub.2 O 0-12 K.sub.2 O 0-6 Al.sub.2 O.sub.3 9-15 lasable ion-containing oxide 0.01-6 La.sub.2 O.sub.3 0-6 SiO.sub.2 0-8 B.sub.2 O.sub.3 0-8 MgO 6-30 CaO 0-15 SrO 0-9 BaO 0-9 ZnO 0-15 Σ
MgO + Li.sub.2 O 20-30 ______________________________________whereby said glass has K90°
C >
0.8 W/mK and α
20-300°
C <
90×
10-7 /°
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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 28, 30)
- C >
-
22. A low- or no-silica phosphate glass useful as a high average power laser medium and having a high thermal conductivity, K90°
- C >
0.8 W/mK, and a low coefficient of thermal expansion, α
20°
-300°
C <
90×
10-7 /°
C, consisting essentially of (on a batch composition basis);
space="preserve" listing-type="tabular">______________________________________ Mole % ______________________________________ P.sub.2 O.sub.5 45-70 Li.sub.2 O 0-14 Na.sub.2 O 0-12 K.sub.2 O 0-6 Al.sub.2 O.sub.3 9-15 lasable ion-containing oxide 0-6 La.sub.2 O.sub.3 0-6 SiO.sub.2 0-8 B.sub.2 O.sub.3 0-8 MgO 6-30 CaO 0-15 SrO 0-9 BaO 0-9 ZnO 0-15 Σ
MgO + Li.sub.2 O 20-30 ______________________________________whereby said glass has K90°
C 22 0.8 W/mK and α
20-300°
C <
90×
10-7 /°
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. - View Dependent Claims (27, 29)
- C >
Specification