US4770811A
Expired / Lapsed
US
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Sensitized laser glass
Assignee: OPTIC-ELECTRONIC CORP
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Filing: 1985-03-22
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Granted: 1988-09-13
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Expires: 2005-03-22
Abstract
Abstract A sensitized laser glass which includes a primary lasing dopant and auxiliary dopants which absorb in regions of the flashlamp emission spectrum away from the absorption bans of the primary dopant and transfer the energy absorbed to the primary dopant, thus improving the efficiency and sensitivity of the laser glass. The auxiliary dopant comprises the combination of cerium and chromium as Ce 2 O 3 and Cr 2 O 3 and the primary dopant is a rare earth metal, preferably neodymium or erbium as Nd 2 O 3 or Er 2 O 3 . Th auxiliary dopant consists essentially of 0.1 to 5% by weight Ce 2 O 3 and 0.025 to 0.1% by weight Cr 2 O 3 , however the preferred concentration of the auxiliary dopant is 2 to 4% by weight Ce 2 O 3 plus 0.03 to 0.07% by weight Cr 2 O 3 . The experimental data establishes that such auxiliary dopants are particularly suitable for phosphate laser glasses.
Inventors
- 👤 John D. Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:35
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/0071; C03C3/00; C03C3/12; C03C3/16; C03C3/17
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
60 words
A sensitized phosphate laser glass composition having P 2 O 5 as the primary glass constituent, a lasing dopant selected from the group consisting of Nd 2 O 3 and Er 2 O 3 , and an auxiliary dopant consisting essentially of 0.1 to 5% by weight Ce 2 O 3 and 0.025 to 0.1% Cr 2 O 3 .
Claim 2
Dependent Claim
60 words
A sensitized phosphate laser glass composition having P 2 O 5 as the primary glass constituent, a lasing dopant selected from the group consisting of Nd 2 O 3 and Er 2 O 3 , and an auxiliary dopant consisting essentially of 0.1 to 5% by weight Ce 2 O 3 and 0.025 to 0.1% Cr 2 O 3 .
Claim 3
Dependent Claim
26 words
The sensitized laser glass defined in claim 1, wherein said auxiliary dopant consists essentially of 2 to 4% by weight cerium and 0.03 to 0.07% chromium.
Claim 4
Dependent Claim
25 words
The sensitized laser glass defined in claim 1, wherein the nominal concentration of said auxiliary lasing dopant consists essentially of 3% cerium and 0.05% chromium.
Claim 5
Dependent Claim
98 words
A sensitized laser glass consisting of the following composition in weight percent: 50 to 70% P 2 O 5 , 1 to 5% of an alkaline metal oxide, 15 to 40% BaO, 1 to 3% Al 2 O 3 , 0 to 25% CaO plus SrO, 0 to 5% of an antisolarant, 0.5 to 25% of a primary lasing dopant selected from the group consisting of Nd 2 O 3 and Er 2 O 3 and an auxiliary dopant consisting essentially of 0.1 to 5% Ce 2 O 3 and 0.025 to 0.1% Cr 2 O 3 .
Claim 6
Dependent Claim
98 words
A sensitized laser glass consisting of the following composition in weight percent: 50 to 70% P 2 O 5 , 1 to 5% of an alkaline metal oxide, 15 to 40% BaO, 1 to 3% Al 2 O 3 , 0 to 25% CaO plus SrO, 0 to 5% of an antisolarant, 0.5 to 25% of a primary lasing dopant selected from the group consisting of Nd 2 O 3 and Er 2 O 3 and an auxiliary dopant consisting essentially of 0.1 to 5% Ce 2 O 3 and 0.025 to 0.1% Cr 2 O 3 .
Claim 7
Dependent Claim
29 words
The sensitized laser glass composition defined in claim 4, wherein said laser glass composition includes 0.5 to 11% by weight Nd 2 O 3 as the primary lasing dopant.
Claim 8
Dependent Claim
29 words
The sensitized laser glass composition defined in claim 4, wherein said laser glass composition includes 0.05 to 1.0% by weight Er 2 O 3 as the primary lasing dopant.
Claim 9
Dependent Claim
33 words
The sensitized laser glass composition defined in claim 4, wherein said auxiliary dopant consists of 2 to 4% by weight Ce 2 O 3 and 0.03 to 0.07% Cr 2 O 3 .
Claim 10
Dependent Claim
32 words
The sensitized laser glass composition defined in claim 4, wherein the nominal concentration of said auxiliary dopant is 3% by weight Ce 2 O 3 and 0.05% Cr 2 O 3 .
Claim 11
Dependent Claim
63 words
A sensitized phosphate laser glass composition including a primary lasing dopant of a rare earth metal element selected from the group consisting of Nd 2 O 3 and Er 2 O 3 and an auxiliary dopant sensitizing said primary dopant consisting essentially of 0.1 to 5% by weight Ce 2 O 3 and 0.025 to 0.1% by weight Cr 2 O 3 .
Claim 12
Dependent Claim
63 words
A sensitized phosphate laser glass composition including a primary lasing dopant of a rare earth metal element selected from the group consisting of Nd 2 O 3 and Er 2 O 3 and an auxiliary dopant sensitizing said primary dopant consisting essentially of 0.1 to 5% by weight Ce 2 O 3 and 0.025 to 0.1% by weight Cr 2 O 3 .
Claim 13
Dependent Claim
47 words
The sensitized laser glass composition defined in claim 9, wherein said primary lasing dopant is 0.2 to 11% by weight Nd 2 O 3 and said auxiliary dopant is 2 to 4% Ce 2 O 3 and 0.03 to 0.07% by weight Cr 2 O 3 .
Claim 14
Dependent Claim
34 words
The sensitized laser glass composition defined in claim 9, wherein the nominal concentration of said auxiliary dopant is 3% by weight Ce 2 O 3 and 0.05% by weight Cr 2 O 3 .
Claim 15
Dependent Claim
25 words
The sensitized laser glass composition defined in claim 9, wherein said primary lasing dopant is 0.05 to 1.0% by weight Er 2 O 3 .
Claim 16
Dependent Claim
98 words
A sensitized phosphate laser glass having P 2 O 5 as the primary glass constituent, a primary lasing dopant selected from the group consisting of Nd 2 O 3 and Er 2 O 3 and auxiliary dopants which absorb laser flashlamp emissions in regions spaced from the absorption band of the primary dopant, thus improving the efficiency of the laser glass, wherein said auxiliary dopants consist essentially of greater than 0.025% by weight Cr 2 O 3 and less than 0.1% by weight Cr 2 O 3 and 0.1 to 5% by weight Ce 2 O 3 .
Claim 17
Dependent Claim
98 words
A sensitized phosphate laser glass having P 2 O 5 as the primary glass constituent, a primary lasing dopant selected from the group consisting of Nd 2 O 3 and Er 2 O 3 and auxiliary dopants which absorb laser flashlamp emissions in regions spaced from the absorption band of the primary dopant, thus improving the efficiency of the laser glass, wherein said auxiliary dopants consist essentially of greater than 0.025% by weight Cr 2 O 3 and less than 0.1% by weight Cr 2 O 3 and 0.1 to 5% by weight Ce 2 O 3 .
Claim 18
Dependent Claim
34 words
The sensitized laser glass defined in claim 13, wherein said auxiliary dopant consists of 2 to 4% by weight Ce 2 O 3 and 0.03 to 0.07% by weight Cr 2 O 3 .
Claim 19
Dependent Claim
33 words
The sensitized laser glass defined in claim 13, wherein the nominal concentration of said auxiliary dopant is 3% by weight Ce 2 O 3 and 0.05% by weight Cr 2 O 3 .
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |