US3340479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser tunable by junction coupling
Assignee: AT&T Inc
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Filing: 1963-06-14
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Granted: 1967-09-05
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Expires: 1983-06-14
Abstract
No abstract record available.
Inventors
- 👤 Ashkin Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:56
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/06; H01S5/062; H01S5/06209; H01S5/0622; H01S5/40; H01S5/4025; H01S5/4031
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A TUNABLE OPTICAL MASER DEVICE COMPRISING A SEMICONDUCTOR MEMBER HAVING REGIONS OF P-TYPE CONDUCTIVITY AND N-TYPE CONDUCTIVITY MATERIALS FORMING FIRST AND SECOND SUBSTANTIALLY PARALLEL AND COEXTENSIVE P-N JUNCTIONS, SAID FIRST JUNCTION BEING CHARACTERIZED BY A THRESHOLD OF OSCILLATION DEPENDENT UPON THE CURRENT FLOW THERETHROUGH AND A FREQUENCY OF OSCILLATION DEPENDENT UPON THE CURRENT DENSITY THEREON, THE SAID SECOND JUNCTION BEING CHARACTERIZED BY A DEPLETION LAYER OF SUFFICIENT WIDTH TO PRODUCE ELECTROMAGNETIC COUPLING WITH SAID FIRST JUNCTION, THE REGION BETWEEN SAID FIRST AND SECOND JUNCTIONS BEING OF SUFFICIENT WIDTH TO PERMIT ELECTROMAGNETIC COUPLING BETWEEN THE TWO JUNCTIONS, MEANS FOR PRODUCING A CURRENT FLOW THROUGH SAID FIRST JUNCTION, AND MEANS FOR CONTROLLING THE AMOUNT OF CURRENT THROUGH SAID FIRST JUNCTION NECESSARY TO PRODUCE OSCILLATIONS COMPRISING MEANS FOR VARYING THE WIDTH OF THE DEPLETION LAYER OF SAID SECOND JUNCTION TO VARY THE DEGREE OF COUPLING BETWEEN THE TWO JUNCTIONS.
Claim 2
Dependent Claim
146 words
A TUNABLE OPTICAL MASER DEVICE COMPRISING A SEMICONDUCTOR MEMBER HAVING REGIONS OF P-TYPE CONDUCTIVITY AND N-TYPE CONDUCTIVITY MATERIALS FORMING FIRST AND SECOND SUBSTANTIALLY PARALLEL AND COEXTENSIVE P-N JUNCTIONS, SAID FIRST JUNCTION BEING CHARACTERIZED BY A THRESHOLD OF OSCILLATION DEPENDENT UPON THE CURRENT FLOW THERETHROUGH AND A FREQUENCY OF OSCILLATION DEPENDENT UPON THE CURRENT DENSITY THEREON, THE SAID SECOND JUNCTION BEING CHARACTERIZED BY A DEPLETION LAYER OF SUFFICIENT WIDTH TO PRODUCE ELECTROMAGNETIC COUPLING WITH SAID FIRST JUNCTION, THE REGION BETWEEN SAID FIRST AND SECOND JUNCTIONS BEING OF SUFFICIENT WIDTH TO PERMIT ELECTROMAGNETIC COUPLING BETWEEN THE TWO JUNCTIONS, MEANS FOR PRODUCING A CURRENT FLOW THROUGH SAID FIRST JUNCTION, AND MEANS FOR CONTROLLING THE AMOUNT OF CURRENT THROUGH SAID FIRST JUNCTION NECESSARY TO PRODUCE OSCILLATIONS COMPRISING MEANS FOR VARYING THE WIDTH OF THE DEPLETION LAYER OF SAID SECOND JUNCTION TO VARY THE DEGREE OF COUPLING BETWEEN THE TWO JUNCTIONS.
References Cited (Backward Citations)
US3158746A
Cited
US3245002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |