US3248670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor laser with optical cavity
Assignee: International Business Machines Corp
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Filing: 1962-10-30
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Granted: 1966-04-26
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Expires: 1982-10-30
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Dill
- 👤 William P Dumke
- 👤 Gordon J Lasher
- 👤 Marshall I Nathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:11
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/30; H01S5/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
AN INJECTION LASER COMPRISING A SEMICONDUCTOR CRYSTAL HAVING A REGION AND AN N REGION AND A JUNCTION BETWEEN SAID REGIONS HAVING A LENGTH SUBSTANTIALLY GREATER THAN ITS WIDTH; A FIRST ELECTRODE ON THE P REGION SIDE OF SAID CRYSTAL; A SECOND ELECTRODE ON THE N REGION SIDE OF SAID CRYSTAL; MEANS COUPLED TO SAID ELECTRODES FOR FORWARD BIASING SAID JUNCTION TO PRODUCE STIMULATED EMISSION OF RADIATION IN SAID CRYSTAL; SAID FIRST AND SECOND ELECTRODES EXTENDING SUBSTANTIALLY OVER THE ENTIRE LENGTH OF SAID JUNCTION TO FORWARD BIAS SAID JUNCTION SUBSTANTIALLY OVER ITS ENTIRE LENGTH; AND MEANS INCLUDING SAID CRYSTAL FORMING AN OPTICAL CAVITY RESONANT FOR SAID RADIATION TRAVELING IN THE DIRECTION OF THE LENGTH OF SAID JUNCTION.
Claim 2
Dependent Claim
116 words
AN INJECTION LASER COMPRISING A SEMICONDUCTOR CRYSTAL HAVING A REGION AND AN N REGION AND A JUNCTION BETWEEN SAID REGIONS HAVING A LENGTH SUBSTANTIALLY GREATER THAN ITS WIDTH; A FIRST ELECTRODE ON THE P REGION SIDE OF SAID CRYSTAL; A SECOND ELECTRODE ON THE N REGION SIDE OF SAID CRYSTAL; MEANS COUPLED TO SAID ELECTRODES FOR FORWARD BIASING SAID JUNCTION TO PRODUCE STIMULATED EMISSION OF RADIATION IN SAID CRYSTAL; SAID FIRST AND SECOND ELECTRODES EXTENDING SUBSTANTIALLY OVER THE ENTIRE LENGTH OF SAID JUNCTION TO FORWARD BIAS SAID JUNCTION SUBSTANTIALLY OVER ITS ENTIRE LENGTH; AND MEANS INCLUDING SAID CRYSTAL FORMING AN OPTICAL CAVITY RESONANT FOR SAID RADIATION TRAVELING IN THE DIRECTION OF THE LENGTH OF SAID JUNCTION.
References Cited (Backward Citations)
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US3064167A
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US3039362A
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US3102201A
Cited
US3059117A
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US3055257A
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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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |