US3571607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly efficient raman emission device
Assignee: AT&T Inc
•
Filing: 1968-11-05
•
Granted: 1971-03-23
•
Expires: 1988-11-05
Abstract
Abstract The invention includes an elongated Raman active medium having total internal reflection means along its longitudinal dimension. Optical pumping is by pulses of duration of the order of several picoseconds or less made incident upon one end of the medium and direction along the longitudinal axis thereof. The Raman emission inherently traverses a zigzag path within the medium at an angle such that the group velocity of the Raman and pump pulses is matched, i.e., differences in group velocity of the pump and Raman radiation due to the dispersion of the medium are compensated for.
Inventors
- 👤 Joseph A Giordmaine
- 👤 Stanley L Shapiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:29
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
79 words
A Raman emission device for matching the group velocity of Raman radiation to the group velocity of pump pulses comprising an elongated Raman emission medium: means for providing total internal multiple reflections of the Raman radiation along the elongated dimension of said medium in response to optical pump pulses; means for generating optical pump pulses of the order of several picoseconds duration or less; and means for directing the pulses into said Raman medium along the elongated dimension thereof.
Claim 2
Dependent Claim
79 words
A Raman emission device for matching the group velocity of Raman radiation to the group velocity of pump pulses comprising an elongated Raman emission medium: means for providing total internal multiple reflections of the Raman radiation along the elongated dimension of said medium in response to optical pump pulses; means for generating optical pump pulses of the order of several picoseconds duration or less; and means for directing the pulses into said Raman medium along the elongated dimension thereof.
Claim 3
Dependent Claim
34 words
The device of claim 1 wherein said medium comprises a Raman active elongated crystal and said total internal reflection means comprises a total internal reflection layer deposited on the elongated surfaces of said crystal.
Claim 4
Dependent Claim
29 words
The device of claim 1 wherein said total internal reflection means comprises the interface between said crystal and the exterior atmosphere, said crystal having highly polished exterior elongated surfaces.
Claim 5
Dependent Claim
64 words
The device of claim 1 wherein said medium comprises a Raman active liquid in combination with elongated container means for carrying said liquid, said elongated container means having transparent ends for admitting pump radiation and for permitting egress of Raman radiation, and wherein said total internal reflection means comprises a total internal reflection layer deposited on the interior elongated surfaces of said container means.
Claim 6
Dependent Claim
64 words
The device of claim 1 wherein said medium comprises a Raman active liquid in combination with elongated container means for carrying said liquid, said elongated container means having transparent ends for admitting pump radiation and for permitting egress of Raman radiation, and wherein said total external reflection means comprises a total external reflection layer deposited on the interior elongated surfaces of said contAiner means.
Claim 7
Dependent Claim
75 words
The device of claim 1 wherein said medium comprises a Raman active liquid in combination with elongated container means for carrying said liquid, said elongated container means having transparent ends for admitting pump radiation and for permitting egress of Raman radiation, and wherein said total internal reflection means comprises the interface between said container and said liquid, the former having a low index of refraction and the latter having a comparatively high index of refraction.
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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |