US3590266A
Expired / Lapsed
US
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Raman oscillator employing rare isotope
Assignee: AT&T Inc
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Filing: 1968-05-10
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Granted: 1971-06-29
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Expires: 1988-05-10
Abstract
Abstract The Raman oscillators disclosed employ Li6NbO3 to provide an oscillation threshold that is substantially lower than for the common Li7NbO3. These oscillators can be tuned by variation of environmental temperature or electric field. In one embodiment, the frequency of oscillation is selectable by choice of a ratio of a mixture of Li6NbO3 and Li7NbO3 in the oscillator.
Inventors
- 👤 Wilbur D Johnston Jr
- 👤 Ivan P Kaminow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:14
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
Apparatus for producing stimulated Raman emission, said apparatus being of the type comprising Raman-active material and means for supplying monochromatic pumping radiation to which said material is substantially transparent and which is capable of exciting Raman activity in said material, said apparatus being characterized in that said material consists essentially of a mixed single crystal consisting essentially of Li6NbO3 and Li7NbO3 according to the formula, x.(Li6NbO3)+(1-x).(Li7NbO3) where x is the mole fraction of Li6NbO3 and is equal to or greater than 0.05.
Claim 2
Dependent Claim
68 words
Apparatus for producing stimulated Raman emission, said apparatus being of the type comprising Raman-active material and means for supplying monochromatic pumping radiation to which said material is substantially transparent and which is capable of exciting Raman activity in said material, said apparatus being characterized in that said material consists essentially of a single crystal of Li6NbO3, where Li6 is a lithium isotope having an atomic weight of 6.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |