US3235813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical maser amplifiers with optimum signal to noise ratio
Assignee: AT&T Inc
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Filing: 1963-06-25
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Granted: 1966-02-15
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Expires: 1983-06-25
Abstract
No abstract record available.
Inventors
- 👤 Herwig W Kogelnik
- 👤 Yariv Amnon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:31
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/23; H01S3/2308; H01S3/005; H01S3/05; H01S3/06; H01S3/0619; H01S3/0621
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
126 words
AN OPTICAL MASER AMPLIFIER HAVING A GIVEN AXIS OF BEAM PROPAGATION COMPRISING A NEGATIVE TEMPERATURE MEDIUM DISPOSED ON SAID AXIS, MEANS FOR PUMPING SAID MEDIUM TO ESTABLISH A POPULATION INVERSION THEREIN, AN OPTICAL OUTPUT SYSTEM HAVING A NOISE ACCEPTANCE FACTOR A POSITIONED ON SAID AXIS BEYOND SAID MEDIUM IN THE PROPAGATION DIRECTION. SAID OPTICAL SYSTEM COMPRISING FIRST APERTURE MEANS HAVING AN APERTURE OF RADIUS A1 POSITIONED IN A FIRST PLANE AT THE EXTREMITY OF SAID MEDIUM AND SECOND APERTURE MEANS HAVING AN APPARENT OPTICAL POSITION IN A SECOND PLANE DIFFERENT FROM SAID FIRST PLANE, MEANS FOR ILLUMINATING SAID NEGATIVE TEMPERATURE MEDIUM ALONG SAID SXIS WITH A SIGNAL BEAM HAVING A GAUSSIAN TRANSVERSE FIELD DISTRIBUTION, SAID SIGNAL BEAM HAVING A SPOTSIZE IN SAID FIRST PLANE EQUAL TO
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |