US4375689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operation of a two-photon three level laser
Assignee: Northrop Grumman Corp
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Filing: 1980-10-10
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Granted: 1983-03-01
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Expires: 2000-10-10
Abstract
Abstract The operation of a two-photon, three level laser system at high temperatures or pressures is made possible by reducing the build up time of the flux of the second lasing transition in the laser discharge region.
Inventors
- 👤 Lyle H. Taylor
- 👤 William H. Kasner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:04
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/22; H01S3/223; H01S3/2232; H01S3/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A method for improving the performance of a two-photon, three level laser system including a laser medium disposed within a laser discharge region wherein lasing occurs at two wavelengths with the lower laser level of the first lasing transition being the upper laser level of the second lasing transition, comprising the step of: reducing the buildup time of the laser flux of the second transition by biasing the initial intensity buildup for said second lasing transition to a predetermined intensity level by externally providing radiation to the laser medium of said laser system at said second wavelength thereby reducing the time required to develop the necessary laser flux for said second lasing transition.
Claim 2
Independent Claim
113 words
A method for improving the performance of a two-photon, three level laser system including a laser medium disposed within a laser discharge region wherein lasing occurs at two wavelengths with the lower laser level of the first lasing transition being the upper laser level of the second lasing transition, comprising the step of: reducing the buildup time of the laser flux of the second transition by biasing the initial intensity buildup for said second lasing transition to a predetermined intensity level by externally providing radiation to the laser medium of said laser system at said second wavelength thereby reducing the time required to develop the necessary laser flux for said second lasing transition.
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) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |