Patent US3680000A successfully refreshed from Google Patents.
US3680000A
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Laser arrangement including a cavity defined by convex and concave mirrors
Assignee: AT&T Inc
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Filing: 1971-03-19
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Granted: 1972-07-25
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Expires: 1991-03-19
Abstract
Abstract A laser cavity defined by convex and concave mirrors and including a discrete intracavity lens is characterized by a relatively large TEMoo spot radius, a short physical length and good stability.
Inventors
- 👤 Ronald Benjamin Chesler
- 👤 Dan Maydan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:05
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
In combination, a laser cavity having a main longitudinal axis, said cavity being defined by spaced-apart convex and concave mirror surfaces positioned along said axis, an active laser element positioned along said axis between said surfaces, and a lens having a focal length f positioned along said axis between said element and said concave surface at a distance p from said concave surface to satisfy the inequality f > p.
Claim 2
Dependent Claim
70 words
In combination, a laser cavity having a main longitudinal axis, said cavity being defined by spaced-apart convex and concave mirror surfaces positioned along said axis, an active laser element positioned along said axis between said surfaces, and a lens having a focal length f positioned along said axis between said element and said concave surface at a distance p from said concave surface to satisfy the inequality f > p.
Claim 3
Dependent Claim
66 words
A laser arrangement having a main longitudinal axis, said arrangement comprising a convex mirror positioned along said axis, a lens, having a focal length f, positioned along said axis, an active laser element positioned along said axis between said mirror and said lens, and a concave mirror positioned along said axis and spaced a distance p from said lens to satisfy the relationship f < p.
Claim 4
Dependent Claim
66 words
A laser arrangement having a main longitudinal axis, said arrangement comprising a convex mirror positioned along said axis, a lens, having a focal length f, positioned along said axis, an active laser element positioned along said axis between said mirror and said lens, and a concave mirror positioned along said axis and spaced a distance p from said lens to satisfy the relationship f < p.
Claim 5
Dependent Claim
26 words
An arrangement as in claim 2 wherein said convex mirror and said lens are formed integral with and on the respective ends of said laser element.
Claim 6
Dependent Claim
14 words
An arrangement as in claim 3 wherein said laser element is made of Nd:YAlG.
Claim 7
Dependent Claim
25 words
An arrangement as in claim 4 further including means for pumping said laser element to cause said arrangement to operate in the TEMoo transverse mode.
References Cited (Backward Citations)
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US3440561A
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US3435363A
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US3487331A
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US3397362A
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US3513402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |