US4820445A
Expired / Lapsed
US
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Active material for the manufacture of laser rods
Assignee: Polska Akademia Nauk Instytut Katalizy I Fizykochemmii Powierzchni
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Filing: 1987-06-09
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Granted: 1989-04-11
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Expires: 2007-06-09
Abstract
Abstract An active material for the manufacture of laser rods, having the chemical composition expressed by the formula A 1+x B 1-y C 3-x O 7-0 .5 x, wherein A is barium, strontium, calcium, or a mixture thereof; B is lanthanum, yttrium, or a mixture thereof; C is gallium, aluminum, or a mixture thereof; and x and y assume both positive and negative values from -0.12 to +0.12;; and as a dopant an active element chosen from the group consisting of praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, erbium, thulium and ytterbium in an amount of from 0.02 to 8.33 atomic percent.
Inventors
- 👤 Wladyslaw Piekarczyk
- 👤 Marek Berkowski
- 👤 Gabriel Jasiolek
- 👤 Witold Ryba-Romanowski
- 👤 Mieczyslaw Chabiera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:07
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/16; H01S3/1601; H01S3/1603; H01S3/1605; Y; Y10; Y10S; Y10S117/00; Y10S117/903; Y10S117/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
An active material for the manufacture of a laser rod, consisting of a single crystal of the formula A 1+x B 1-y C 3-x+y O 7-0 .5x, wherein A is a material selected from the group consisting of barium, strontium, calcium and a mixture thereof; B is a material selected from the group consisting of lanthanum, yttrium, and a mixture thereof; C is a material selected from the group consisting of gallium, aluminum and a mixture thereof; and x and y are parameters assuming each is between -0.12 and +0.12; and as a dopant an active element chosen from the group consisting of praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, erbium, thulium and ytterbium in an amount of from 0.02 to 8.33 atomic percent in relation to all atoms in the formula.
Claim 2
Dependent Claim
132 words
An active material for the manufacture of a laser rod, consisting of a single crystal of the formula A 1+x B 1-y C 3-x+y O 7-0 .5x, wherein A is a material selected from the group consisting of barium, strontium, calcium and a mixture thereof; B is a material selected from the group consisting of lanthanum, yttrium, and a mixture thereof; C is a material selected from the group consisting of gallium, aluminum and a mixture thereof; and x and y are parameters assuming each is between -0.12 and +0.12; and as a dopant an active element chosen from the group consisting of praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, erbium, thulium and ytterbium in an amount of from 0.02 to 8.33 atomic percent in relation to all atoms in the formula.
References Cited (Backward Citations)
US3897358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |