Patent USD249705S successfully refreshed from Google Patents.
US3745476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light amplification using absorbing medium
Assignee: RTX Corp
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Filing: 1971-04-08
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Granted: 1973-07-10
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Expires: 1991-04-08
Abstract
Abstract An absorbing medium under the influence of a sufficiently intense light beam from a laser will amplify a weaker light beam simultaneously incident on the absorbing medium. If the two beams make a small angle with each other, a third light beam is produced. Optical coincident logic may be performed with the light beams.
Inventors
- 👤 M Mack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:51
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/3523; G02F1/353; G02F1/3534; G02F3/00; H; H01; H01S; H01S3/00; H01S3/23; H01S3/2358
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
27 words
Amplification apparatus as in claim 1 in which said first and second optical beamS are pulsed beams and said pulses are simultaneously incident with said absorbing medium.
Claim 2
Dependent Claim
40 words
Amplification apparatus as in claim 1 in which said first and second beams intersect said absorbing medium at an angle of 10 milliradians or less relative to each other, additional optical beams being produced and emanating from said absorbing medium.
Claim 3
Dependent Claim
38 words
Amplification apparatus as in claim 3 in which said first and second beams are of different optical frequencies, and in which said additional optical beams are at optical frequencies which are harmonics of said first and second beams.
Claim 4
Dependent Claim
84 words
An optical coincident logic apparatus comprising an optical absorbing medium, a first optical beam of high intensity, a second optical beam of low intensity, said first and second optical beams intersecting said absorbing medium at a small angle to each other, coincidence of said first and second beams producing a plurality of additional beams which emanate from said absorbing medium, and a photodetector positioned in the path of one of said additional beams and producing an output signal only when said additional beams occur.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |