US4048516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser apparatus for producing stimulated Raman scattering
Assignee: General Dynamics Government Systems Corp
•
Filing: 1976-12-02
•
Granted: 1977-09-13
•
Expires: 1996-12-02
Abstract
Abstract Stimulated Raman scattering (SRS) at kHz pulse repetition rates is substantially improved with a laser configuration in which the Raman oscillator mirrors within the laser resonator are removed and the laser mirrors are used for both the laser and the Raman (Stokes) resonators. This sharing of the laser resonator by the Raman oscillator has increased the average power and stability of the first and second Stokes wavelengths, has reduced optical wear on the mirrors, and has resulted in a substantially simplified resonator design.
Inventors
- 👤 Eugene O. Ammann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:05
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
Apparatus for producing stimulated Raman scattering comprising a laser having a lasing medium, means to excite said lasing medium whereby to produce a beam of coherent light, and laser mirrors spaced from opposite sides respectively of said medium and traversing said beam whereby to define the laser cavity, switch means in said laser cavity operative on said beam, means to activate and deactivate said switch means whereby to produce a succession of pulses of said coherent light, a body of transparent dielectric material between said lasing medium and one of said mirrors and positioned to be traversed by said light pulses whereby to produce stimulated Raman scattering of the light, and means to cause said scattered light to oscillate through said dielectric material comprising said laser mirrors.
Claim 2
Dependent Claim
127 words
Apparatus for producing stimulated Raman scattering comprising a laser having a lasing medium, means to excite said lasing medium whereby to produce a beam of coherent light, and laser mirrors spaced from opposite sides respectively of said medium and traversing said beam whereby to define the laser cavity, switch means in said laser cavity operative on said beam, means to activate and deactivate said switch means whereby to produce a succession of pulses of said coherent light, a body of transparent dielectric material between said lasing medium and one of said mirrors and positioned to be traversed by said light pulses whereby to produce stimulated Raman scattering of the light, and means to cause said scattered light to oscillate through said dielectric material comprising said laser mirrors.
Claim 3
Dependent Claim
17 words
The apparatus according to claim 1 in which said dielectric material is lithium iodate (LIO 3 ).
Claim 4
Dependent Claim
14 words
The apparatus according to claim 1 in which said switch means is a Q-switch.
Claim 5
Dependent Claim
70 words
Apparatus for producing stimulated Raman scattering comprising a laser having cavity defined by a pair of mirrors and producing a laser beam, Q-switch means operative on said beam to produce high intensity pulses, and crystal means positioned in said cavity to be traversed by said pulses whereby to stimulate Raman scattering and produce an output at the Stokes wavelengths, and means to resonate said Stokes outputs comprising the laser mirrors.
Claim 6
Dependent Claim
70 words
Apparatus for producing stimulated Raman scattering comprising a laser having cavity defined by a pair of mirrors and producing a laser beam, Q-switch means operative on said beam to produce high intensity pulses, and crystal means positioned in said cavity to be traversed by said pulses whereby to stimulate Raman scattering and produce an output at the Stokes wavelengths, and means to resonate said Stokes outputs comprising the laser mirrors.
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |