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US4333848A
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Athermal laser glass composition
Assignee: Darby Bank and Trust Co
•
Filing: 1980-12-03
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Granted: 1982-06-08
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Expires: 2000-12-03
Abstract
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 2 O 5 , 3 to 15% of an alkali metal oxide, preferably Li 2 O plus K 2 O, 20 to 30% BaO and 0.5 to 5% Al 2 O 3 . Up to 15% of the BaO may be replaced by CaO, SrO or MgO and part of the Al 2 O 3 may be replaced by Nd 2 O 3 . The total Al 2 O 3 plus Nd 2 O 3 is 4 mole percent ±1.5%. The laser glass composition also includes a laseable component, preferably Nd 2 O 3 and preferably includes a solarization inhibitor.
Inventors
- 👤 John D. Myers
- 👤 Charles S. Vollers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:53
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/0071; C03C3/00; C03C3/12; C03C3/16; C03C3/17
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
128 words
A temperature stable phosphate laser glass comprising a phosphate base glass composition and additions including 0.5 to 10 percent by weight of a lasing component and 0.5 to 5 percent by weight of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 3 , said phosphate base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
55-65%
Li.sub.2 O 6-12%
K.sub.2 O 0-10%
BaO 20-30%
CaO 0-10%
SrO 0-10%
Al.sub.2 O.sub.3
1-4%
______________________________________ wherein the total of Li 2 O and K 2 O is less than 15 mole percent and the total of Al 3 O 3 plus Nd 2 O 3 as the lasing component is 4 ± 1.5 mole percent.
Claim 2
Dependent Claim
128 words
A temperature stable phosphate laser glass comprising a phosphate base glass composition and additions including 0.5 to 10 percent by weight of a lasing component and 0.5 to 5 percent by weight of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 3 , said phosphate base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
55-65%
Li.sub.2 O 6-12%
K.sub.2 O 0-10%
BaO 20-30%
CaO 0-10%
SrO 0-10%
Al.sub.2 O.sub.3
1-4%
______________________________________ wherein the total of Li 2 O and K 2 O is less than 15 mole percent and the total of Al 3 O 3 plus Nd 2 O 3 as the lasing component is 4 ± 1.5 mole percent.
Claim 3
Dependent Claim
45 words
The temperature stable phosphate laser glass composition defined in claim 1, characterized in that said phosphate base glass composition includes one to three mole percent K 2 O and the total of Li 2 O and K 2 O is 8 to 15 mole percent.
Claim 4
Dependent Claim
44 words
The temperature stable phosphate laser glass composition defined in claim 2, in the form of a laser rod, wherein the lasing threshold is less than 9 joules using a 55 percent output reflector and said laser rod is chemically stable using a water coolant.
Claim 5
Dependent Claim
35 words
The temperature stable phosphate laser glass defined in claim 3, wherein the output of said laser rod is greater than 800 millijoules with an input of 40.5 joules when pulsed at one pulse per second.
Claim 6
Dependent Claim
31 words
The temperature stable phosphate laser glass defined in claim 4, characterized in that the laser beam generated by said laser rod expands less than ten percent at ten pulses per second.
Claim 7
Dependent Claim
65 words
The phosphate laser glass composition defined in claim 1, characterized in that said additions comprise one to ten percent by weight of the total glass composition of Nd 2 O 3 and 0.5 to 3 percent by weight of the total glass composition of solarization inhibitors selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 3 .
Claim 8
Dependent Claim
125 words
A temperature stable phosphate laser glass, comprising a phosphate base glass composition and additions including 0.5 to 10 percent by weight of a lasing component and 0.5 to 5 percent by weight of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 3 , said base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
55-65%
Li.sub.2 O 6-12%
K.sub.2 O 1-3%
BaO 20-25%
CaO 0-10%
SrO 0-10%
Al.sub.2 O.sub.3
.5-4%
______________________________________ wherein up to ten mole percent of CaO, MgO and SrO are substituted for BaO and the total of Al 2 O 3 plus Nd 2 O 3 as the lasing component is 4 ± 1.5 mole percent.
Claim 9
Dependent Claim
125 words
A temperature stable phosphate laser glass, comprising a phosphate base glass composition and additions including 0.5 to 10 percent by weight of a lasing component and 0.5 to 5 percent by weight of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 3 , said base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
55-65%
Li.sub.2 O 6-12%
K.sub.2 O 1-3%
BaO 20-25%
CaO 0-10%
SrO 0-10%
Al.sub.2 O.sub.3
.5-4%
______________________________________ wherein up to ten mole percent of CaO, MgO and SrO are substituted for BaO and the total of Al 2 O 3 plus Nd 2 O 3 as the lasing component is 4 ± 1.5 mole percent.
Claim 10
Dependent Claim
63 words
The temperature stable phosphate laser glass composition defined in claim 16, characterized in that said glass composition is in the form of a laser rod having a lasing threshold of less than 9 joules using a 55 percent output reflector and said laser rod has an output of greater than 800 millijoules at 40.5 joules input when pulsed at one pulse per second.
Claim 11
Dependent Claim
124 words
A neodymium doped temperature stable phosphate laser glass composition, comprising a phosphate base glass composition and additions including 0.5 to 10 percent by weight of Nd 2 O 3 and 0.5 to 5 percent by weight of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 3 , said base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
55-65%
Li.sub.2 O 6-9%
K.sub.2 O 1-3%
BaO 20-25%
CaO 0-10%
SrO 0-10%
Al.sub.2 O.sub.3
.5-3%
______________________________________ wherein up to ten mole percent of CaO and SrO are substituted for BaO and the total of Al 2 O 3 plus Nd 2 O 3 is 4 ± 1.5 mole percent.
Claim 12
Dependent Claim
124 words
A neodymium doped temperature stable phosphate laser glass composition, comprising a phosphate base glass composition and additions including 0.5 to 10 percent by weight of Nd 2 O 3 and 0.5 to 5 percent by weight of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 3 , said base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
55-65%
Li.sub.2 O 6-9%
K.sub.2 O 1-3%
BaO 20-25%
CaO 0-10%
SrO 0-10%
Al.sub.2 O.sub.3
.5-3%
______________________________________ wherein up to ten mole percent of CaO and SrO are substituted for BaO and the total of Al 2 O 3 plus Nd 2 O 3 is 4 ± 1.5 mole percent.
Claim 13
Dependent Claim
81 words
A temperature stable phosphate laser glass composition, comprising a phosphate base glass composition and additions including 0.5 to 10 percent Nd 2 O 3 and 0.5 to 3 percent of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 3 , said phosphate base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
65%
Li.sub.2 O 8.5%
K.sub.2 O 1.5%
BaO 22.5%
Al.sub.2 O.sub.3
2.5%
______________________________________
Claim 14
Dependent Claim
81 words
A temperature stable phosphate laser glass composition, comprising a phosphate base glass composition and additions including 0.5 to 10 percent Nd 2 O 3 and 0.5 to 3 percent of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 3 , said phosphate base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
65%
Li.sub.2 O 8.5%
K.sub.2 O 1.5%
BaO 22.5%
Al.sub.2 O.sub.3
2.5%
______________________________________
Claim 15
Dependent Claim
81 words
A temperature stable phosphate laser glass composition, comprising a phosphate base glass composition and additions including 0.5 to 10 percent Nd 2 O 3 and 0.5 to 3 percent of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 3 , said phosphate base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
65%
Li.sub.2 O 7.5%
K.sub.2 O 2.5%
BaO 22.5%
Al.sub.2 O.sub.3
2.5%
______________________________________
Claim 16
Dependent Claim
81 words
A temperature stable phosphate laser glass composition, comprising a phosphate base glass composition and additions including 0.5 to 10 percent Nd 2 O 3 and 0.5 to 3 percent of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 3 , said phosphate base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
65%
Li.sub.2 O 7.5%
K.sub.2 O 2.5%
BaO 22.5%
Al.sub.2 O.sub.3
2.5%
______________________________________
Claim 17
Dependent Claim
81 words
A temperature stable phosphate laser glass composition, comprising a phosphate base glass composition and additions including 0.5 to 10 percent Nd 2 O 3 and 0.5 to 3 percent of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 3 , said phosphate base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
65%
Li.sub.2 O 8.5%
K.sub.2 O 2.0%
BaO 22%
Al.sub.2 O.sub.3
2.5%
______________________________________
Claim 18
Dependent Claim
81 words
A temperature stable phosphate laser glass composition, comprising a phosphate base glass composition and additions including 0.5 to 10 percent Nd 2 O 3 and 0.5 to 3 percent of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 3 , said phosphate base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
65%
Li.sub.2 O 8.5%
K.sub.2 O 2.0%
BaO 22%
Al.sub.2 O.sub.3
2.5%
______________________________________
Claim 19
Dependent Claim
83 words
A temperature stable phosphate laser glass composition, comprising a phosphate base glass composition and additions including 0.5 to 10 percent Nd 2 O 3 and 0.5% to 3 percent of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 3 , said phosphate base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
63%
Li.sub.2 O 8.6%
K.sub.2 O 1.5%
BaO 22.8%
CaO 3.1%
Al.sub.2 O.sub.3
1%
______________________________________
Claim 20
Dependent Claim
83 words
A temperature stable phosphate laser glass composition, comprising a phosphate base glass composition and additions including 0.5 to 10 percent Nd 2 O 3 and 0.5% to 3 percent of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 3 , said phosphate base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
63%
Li.sub.2 O 8.6%
K.sub.2 O 1.5%
BaO 22.8%
CaO 3.1%
Al.sub.2 O.sub.3
1%
______________________________________
Claim 21
Dependent Claim
84 words
A temperature stable phosphate laser glass composition, comprising a phosphate base glass composition and additions including 0.5 to 10 percent by weight Nd 2 O 3 and 0.5 to 3% by weight of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 5 , said phosphate base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
66.5%
Li.sub.2 O 8.5%
K.sub.2 O 1.5%
BaO 22.5%
Al.sub.2 O.sub.3
1%
______________________________________
Claim 22
Dependent Claim
84 words
A temperature stable phosphate laser glass composition, comprising a phosphate base glass composition and additions including 0.5 to 10 percent by weight Nd 2 O 3 and 0.5 to 3% by weight of a solarization inhibitor selected from the group consisting of SiO 2 , Nb 2 O 5 and Sb 2 O 5 , said phosphate base glass composition consisting essentially of the following, in mole percent: ______________________________________
P.sub.2 O.sub.5
66.5%
Li.sub.2 O 8.5%
K.sub.2 O 1.5%
BaO 22.5%
Al.sub.2 O.sub.3
1%
______________________________________
Claim 23
Dependent Claim
42 words
A temperature stable phosphate laser glass composition consisting essentially of the following, in weight percent: ______________________________________
P.sub.2 O.sub.5
59%
Li.sub.2 O 2%
K.sub.2 O 1%
CaO 1%
BaO 26%
Al.sub.2 O.sub.3
0.5%
Nb.sub.2 O.sub.5
1%
Sb.sub.2 O.sub.3
0.5%
Nd.sub.2 O.sub.3
9%
______________________________________
Claim 24
Dependent Claim
42 words
A temperature stable phosphate laser glass composition consisting essentially of the following, in weight percent: ______________________________________
P.sub.2 O.sub.5
59%
Li.sub.2 O 2%
K.sub.2 O 1%
CaO 1%
BaO 26%
Al.sub.2 O.sub.3
0.5%
Nb.sub.2 O.sub.5
1%
Sb.sub.2 O.sub.3
0.5%
Nd.sub.2 O.sub.3
9%
______________________________________
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |