US4380072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
XUV Laser and method
Assignee: Leland Stanford Junior University
•
Filing: 1980-12-22
•
Granted: 1983-04-12
•
Expires: 2000-12-22
Abstract
Abstract The method of generating XUV radiation which involves exciting atoms to a storage level, irradiating the excited atoms and raising them to a higher level and allowing the atoms to lase to a lower level other than ground which is simultaneously emptied.
Inventors
- 👤 Stephen E. Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:20
CPC Classifications
H; H01; H01S; H01S4/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
91 words
The method of generating XUV radiation which comprises exciting alkali metal atoms or ions of the isoelectronic sequence to a storage level which is metastable against both autoionization and radiation, pumping by irradiating with a laser the excited atoms to a higher level which is metastable against autoionization but is strongly radiatively allowed to lase to a lower level other than ground and simultaneously emptying said lower level, both radiatively and by photoionization into the continua or to a level near enough to the continua, that electrons complete the emptying process.
Claim 2
Independent Claim
91 words
The method of generating XUV radiation which comprises exciting alkali metal atoms or ions of the isoelectronic sequence to a storage level which is metastable against both autoionization and radiation, pumping by irradiating with a laser the excited atoms to a higher level which is metastable against autoionization but is strongly radiatively allowed to lase to a lower level other than ground and simultaneously emptying said lower level, both radiatively and by photoionization into the continua or to a level near enough to the continua, that electrons complete the emptying process.
Claim 3
Dependent Claim
13 words
The method of claim 1 in which said metal atoms are lithium atoms.
Claim 4
Dependent Claim
13 words
The method of claim 1 in which said metal atoms are potassium atoms.
Claim 5
Dependent Claim
13 words
The method of claim 1 in which said metal atoms are sodium atoms.
Claim 6
Dependent Claim
13 words
The method of claim 1 in which said metal atoms are rubidium atoms.
Claim 7
Dependent Claim
12 words
The method of claim 1 in which said ions are beryllium ions.
Claim 8
Dependent Claim
15 words
The method of claim 1 in which the lower level is emptied by pumping radiation.
Claim 9
Dependent Claim
16 words
The method of claim 1 in which the lower level is emptied by a second laser.
Claim 10
Dependent Claim
16 words
The method of claim 1 in which the atoms or ions are excited by a discharge.
Claim 11
Dependent Claim
16 words
The method of claim 1 in which the atoms or ions are excited by microwave radiation.
Claim 12
Dependent Claim
23 words
The method of claim 1 in which the metal atoms are lithium and the atoms are excited to the 1s2s2p4P 0 5/2 level.
Claim 13
Dependent Claim
25 words
The method of claim 1 in which the metal atoms are lithium and the atoms are excited to the 1s2s4p 4 P 0 5/2 level.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-11 | 1986-10-11 | 1987-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-11 | 1990-10-11 | 1991-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-11 | 1994-10-11 | 1995-04-12 | $7700.00 | Window Closed / Lapsed |