US3624544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self mode-locking of lasers using dyes
Assignee: RTX Corp
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Filing: 1966-03-23
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Granted: 1971-11-30
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Expires: 1986-03-23
Abstract
Abstract A laser is self mode-locked by placing an expander element comprising a saturable absorber which has a faster recovery time than the loop time delay of the laser within the optical cavity of the laser. Acoustic waves may be propagated within the saturable absorber to gate the laser output.
Inventors
- 👤 Anthony J De Maria
- 👤 David A Stetser Jr
- 👤 Hans A Heynau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:59
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/11; H01S3/1106; H01S3/1112; H01S3/1115; H01S3/106; H01S3/1068; H01S3/1109; H01S3/1123; H01S3/113
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
36 words
Apparatus as in claim 1 in which the ratio between the optical beam width and the wavelength of the acoustic wave is greater than unity whereby said optical beam is diffracted upon passage through said cell.
Claim 2
Dependent Claim
36 words
Apparatus as in claim 9 in which the ratio between the optical beam width and the wavelength of the acoustic wave is less than unity whereby said optical beam is refracted upon passage through said cell.
Claim 3
Dependent Claim
95 words
Apparatus for simultaneously modulating and mode-locking a laser comprising means for generating a laser beam including a laser amplifier having at least two end reflectors, one of said reflectors being spaced from said laser amplifier, said reflectors defining an optical cavity, a cell transparent to said laser beam positioned between said laser amplifier and said spaced reflector, said cell containing a saturable absorber medium, a transducer connected with said cell, means for generating an ultrasonic signal, and means for connecting said signal to actuate said transducer whereby ultrasonic acoustic waves are generated within said medium.
Claim 4
Dependent Claim
14 words
Apparatus as in claim 4 wherein said saturable absorber is a reversible bleachable dye.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |