Patent US3568087A successfully refreshed from Google Patents.
US3568087A
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US
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Optically pumped semiconductor laser
Assignee: Massachusetts Institute of Technology
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Filing: 1965-07-16
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Granted: 1971-03-02
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Expires: 1985-07-16
Abstract
Abstract A semiconductor laser is provided including a body of semiconductor material enclosed within an optical cavity the reflectors of which may be formed by the ends of the body and an intense beam of electromagnetic energy is directed to at least a portion of the body of semiconductor material between the reflectors, the intensity being sufficient to produce an inverted population of energy states within the material accompanied by direct transitions of energy states from an elevated state to a lower state producing radiation which is amplified within the optical cavity by the process of stimulation producing a beam of coherent radiation which is launched from the body.
Inventors
- 👤 Robert J Phelan Jr
- 👤 Robert H Rediker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:33
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/30; H01S5/04; H01S5/041; H01S5/02; H01S5/022; H01S5/023; H01S5/02325; H01S5/40; H01S5/4025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
An optically pumped laser system comprising a plurality of separate bodies of different semiconductor material composition, means for supporting said bodies of semiconductor material in spaced relationship whereby selected of said bodies can be positioned by movement of said supporting means, a plurality of sources of optical energy each producing a beam of said optical energy and means for directing at least one of said beams to said selected body, whereby direct transition lasering action is produced within the optical cavity enclosing said selected body and means for energizing said sources of optical energy, the sequence of energizing said sources and positioning said semiconductor bodies being such that a beam of coherent radiation is produced emanating from said optical cavity, the radiation band, the intensity and the intervals of said radiation being controlled.
Claim 2
Dependent Claim
133 words
An optically pumped laser system comprising a plurality of separate bodies of different semiconductor material composition, means for supporting said bodies of semiconductor material in spaced relationship whereby selected of said bodies can be positioned by movement of said supporting means, a plurality of sources of optical energy each producing a beam of said optical energy and means for directing at least one of said beams to said selected body, whereby direct transition lasering action is produced within the optical cavity enclosing said selected body and means for energizing said sources of optical energy, the sequence of energizing said sources and positioning said semiconductor bodies being such that a beam of coherent radiation is produced emanating from said optical cavity, the radiation band, the intensity and the intervals of said radiation being controlled.
References Cited (Backward Citations)
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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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |