Patent US2872635A successfully refreshed from Google Patents.
US3234475A
Expired / Lapsed
US
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Efficient optical harmonic generation, parametric amplification, oscillation and modulation
Assignee: AT&T Inc
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Filing: 1961-12-11
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Granted: 1966-02-08
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Expires: 1981-12-11
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Giordmaine
- 👤 David A Kleinman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:12
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN COMBINATION, MEANS SUPPLYING COHERENT INPUT ELECTROMAGNETIC RADIATION, A SUBSTANTIALLY NONLINEAR, BIREFRIGENT, NONCENTROSYMMETRIC, LOW LOSS CRYSTAL HAVING AN OPTIC AXIS AND A DIRECTION ALONG WHICH THE WAVE OF POLARIZATION AT THE DESIRED OUTPUT FREQUENCY SET UP BY SAID INPUT RADIATION HAS A PHASE VELOCITY SUBSTANTIALLY EQUAL TO THE PHASE VELOCITY OF AN INDUCED WAVE OF THE DESIRED FREQUENCY, SAID CRYSTAL BEING POSITIONED TO RECEIVE SAID INPUT RADIATION ALONG SAID DIRECTION, SAID RADIATION HAVING A SUBSTANTIAL E VECTOR COMPONENT NORMAL TO SAID OPTIC AXIS, AND MEANS FOR ABSTRACTING FOR UTILIZATION AN OUTPUT OF THE DESIRED FREQUENCY.
Claim 2
Dependent Claim
95 words
IN COMBINATION, MEANS SUPPLYING COHERENT INPUT ELECTROMAGNETIC RADIATION, A SUBSTANTIALLY NONLINEAR, BIREFRIGENT, NONCENTROSYMMETRIC, LOW LOSS CRYSTAL HAVING AN OPTIC AXIS AND A DIRECTION ALONG WHICH THE WAVE OF POLARIZATION AT THE DESIRED OUTPUT FREQUENCY SET UP BY SAID INPUT RADIATION HAS A PHASE VELOCITY SUBSTANTIALLY EQUAL TO THE PHASE VELOCITY OF AN INDUCED WAVE OF THE DESIRED FREQUENCY, SAID CRYSTAL BEING POSITIONED TO RECEIVE SAID INPUT RADIATION ALONG SAID DIRECTION, SAID RADIATION HAVING A SUBSTANTIAL E VECTOR COMPONENT NORMAL TO SAID OPTIC AXIS, AND MEANS FOR ABSTRACTING FOR UTILIZATION AN OUTPUT OF THE DESIRED FREQUENCY.
References Cited (Backward Citations)
US2929922A
Cited
US3602959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |