US4069458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power laser chain
Assignee: Alcatel Lucent SAS
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Filing: 1975-12-01
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Granted: 1978-01-17
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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
2026-10-22 18:16
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)
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Cited
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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) | 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 |