US3974454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser amplifiers
Assignee: Alcatel Lucent SAS
•
Filing: 1975-01-14
•
Granted: 1976-08-10
•
Expires: 1995-01-14
Abstract
Abstract Laser amplifier of the type comprising a straight cylinder surrounded by a flash, characterized in that the cylinder comprises a first internal portion made of doped glass, having the shape of a cylinder of revolution whose shape is obtained by the rotation about an axis of an arc of a curve turning its convexity towards the axis and a second portion surrounding the first and whose component material is a liquid having an index close to that of the material constituting the first portion.
Inventors
- 👤 Bernard Sturel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:56
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/0602; H01S3/02; H01S3/025; H01S3/14; H01S3/16; H01S3/17
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
156 words
In a laser amplifier comprising an element having the shape of a straight cylinder of revolution about an axis, said element being able to amplify a radial gaussian laser beam crossing through the element along said axis, and a source of light power surrounding said element and capable of radially illuminating the element, the improvement in which said element comprises a first internal portion constituted by a doped glass bar having a shape defined by a revolution surface obtained by rotation of a curve arc about said axis, said curve are turning its convexity towards the axis and stretching from an end to the other end of the element, and a second portion surrounding the internal portion, said second portion constituted by a liquid having a refraction index matching that of the said doped glass, whereby the detrimental effect of the diffraction caused by the passing of the radial gaussian beam through said element is decreased.
Claim 2
Dependent Claim
156 words
In a laser amplifier comprising an element having the shape of a straight cylinder of revolution about an axis, said element being able to amplify a radial gaussian laser beam crossing through the element along said axis, and a source of light power surrounding said element and capable of radially illuminating the element, the improvement in which said element comprises a first internal portion constituted by a doped glass bar having a shape defined by a revolution surface obtained by rotation of a curve arc about said axis, said curve are turning its convexity towards the axis and stretching from an end to the other end of the element, and a second portion surrounding the internal portion, said second portion constituted by a liquid having a refraction index matching that of the said doped glass, whereby the detrimental effect of the diffraction caused by the passing of the radial gaussian beam through said element is decreased.
Claim 3
Dependent Claim
35 words
The improvement according to claim 1 wherein, when said glas bar is doped with neodymium, the liquid constituting the second portion is chosen from among bromoform in a solution with ethanol or with dimethyl sulfoxide.
References Cited (Backward Citations)
US3137827A
Cited
US3153204A
Cited
US3395366A
Cited
US3530397A
Cited
US3428914A
Cited
US3602836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |