US3825856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser generator for single transverse mode operation
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1972-12-07
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Granted: 1974-07-23
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Expires: 1992-12-07
Abstract
Abstract A laser generator which oscillates in a single transverse mode comprises an amplifying medium placed within a resonator consisting of two oppositely facing mirrors. Provision is made within the resonator for an optical system of revolution having an axis which is adjacent to the resonator axis and comprising a divergent lens of homogeneous absorbent material.
Inventors
- 👤 J Pezot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:25
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/08; H01S3/08018; H01S3/0804; H01S3/0805; H01S3/08045; H01S3/10; H01S3/11; H01S3/1123
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
A laser generator comprising: a laser medium located within a resonator defined by two oppositely facing mirrors and having a main longitudinal axis; means for energizing said laser medium to establish a laserable inversion of energy states thereof to give rise to a stimulated emission, and means for selecting a single transverse mode of substantial width comprising attenuation means positioned on said axis between said laser medium and one of said mirrors for providing absorption of said stimulated emission that increases continuously with increasing radius from said axis.
Claim 2
Dependent Claim
88 words
A laser generator comprising: a laser medium located within a resonator defined by two oppositely facing mirrors and having a main longitudinal axis; means for energizing said laser medium to establish a laserable inversion of energy states thereof to give rise to a stimulated emission, and means for selecting a single transverse mode of substantial width comprising attenuation means positioned on said axis between said laser medium and one of said mirrors for providing absorption of said stimulated emission that increases continuously with increasing radius from said axis.
Claim 3
Dependent Claim
28 words
A laser generator according to claim 1 in which said attenuation means includes a divergent lens made of a homogeneous material which is absorbent for said stimulated emission.
Claim 4
Dependent Claim
33 words
A laser generator according to claim 2 in which the assembly of said divergent lens and that one of said mirrors which is nearer said lens is optically equivalent to a plane mirror.
Claim 5
Dependent Claim
59 words
A laser generator according to claim 2 in which there is provided at least one transparent convergent lens positioned on said axis between said laser medium and that one of said mirrors which is nearer to said divergent lens, the assembly of said divergent lens, said convergent lens and said nearer mirror being optically equivalent to a plane mirror.
Claim 6
Dependent Claim
34 words
A laser generator according to claim 4 in which the assembly of said divergent lens and said transparent convergent lens constitutes an afocal system, and in which said nearer mirror is a plane mirror.
Claim 7
Dependent Claim
30 words
A laser generator according to claim 1 in which said means for energizing said laser medium are such as to cause said laser to operate in the TEM00 transverse mode.
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |