Patent US4069458A successfully refreshed from Google Patents.
US4069458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power laser chain
Assignee: Alcatel Lucent SAS
•
Filing: 1975-12-01
•
Granted: 1978-01-17
•
Expires: 1995-12-01
Abstract
Abstract Power laser chain. Two amplifying elements are separated by a linear polarizer placed between two polarization transformers such as a quarter wave plate or a Fresnel parallelepiped, this preventing auto-oscillators in the amplifying chain, it being possible to repeat that sequence several times in the chain.
Inventors
- 👤 Jean-Claude Farcy
- 👤 Genevieve Girard
- 👤 Maurice Michon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:46
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/23; H01S3/2308; H01S3/2316; H01S3/005; H01S3/0064
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
In a laser chain including means for generating a circularly polarized laser beam and a plurality of amplifier elements on the path of the laser beam for passage of said laser beam therethrough, the improvement comprising: means for optically isolating successive amplifier elements, said optically isolating means comprising in series on the path of the laser beam and between said amplifier elements, a linear polarizer between two passive transformers of the type transforming a linear polarization into a circular one and vice versa.
Claim 2
Dependent Claim
83 words
In a laser chain including means for generating a circularly polarized laser beam and a plurality of amplifier elements on the path of the laser beam for passage of said laser beam therethrough, the improvement comprising: means for optically isolating successive amplifier elements, said optically isolating means comprising in series on the path of the laser beam and between said amplifier elements, a linear polarizer between two passive transformers of the type transforming a linear polarization into a circular one and vice versa.
Claim 3
Dependent Claim
43 words
The laser chain according to claim 1, further comprising a modular situated between said oscillator and said first transformer, said modulator comprising, in series: a third linear polarizer crossed with said first polarizer; and a Pockels cell intermediate said first and third polarizer.
Claim 4
Dependent Claim
41 words
The laser chain as claimed in claim 1 for operating at a wave length of between 9 and 12 microns and wherein said transformers comprise Fresnel parallelepipeds formed of one material of the group consisting of sodium chloride and potassium bromide.
References Cited (Backward Citations)
US3060808A
Cited
US3191493A
Cited
US3401590A
Cited
US3407364A
Cited
US3523718A
Cited
FR1585293A
Cited
US3584312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |