US4709368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side-arm phase-conjugated laser
Assignee: United States Department of the Army
•
Filing: 1985-09-24
•
Granted: 1987-11-24
•
Expires: 2005-09-24
Abstract
Abstract A phase-conjugated Q-switched laser resonator. The resonator contains a laser active material and a polarizer/quarter-wave plate combination in a starter cavity. The polarizer optically couples one plane of polarization of laser radiation into a side arm containing a self-switching stimulated scattering phase-conjugate mirror.
Inventors
- 👤 Robert C. Fukuda
- 👤 Suresh Chandra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:17
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/10076; H01S3/106; H01S3/108; H01S3/1086; H01S3/11; H01S3/1123; H01S3/05; H01S3/08; H01S3/08018; H01S3/0804; H01S3/0805; H01S3/08054; H01S3/081; H01S3/082
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
97 words
A phase-conjugated Q-switched laser including: a starter cavity defined by opposed reflectors; a laser active material in said starter cavity; a pump for said laser active material; a side-arm containing a phase conjugate mirror consisting of a lens and a stimulated Brillouin scattering cell; means for optically coupling said starter cavity to said side-arm and including a quarterwave plate and a polarizer in said starter cavity, wherein said cell acts as a Q-switch by undergoing stimulated Brillouin scattering when the laser active material is pumped by said pump and a laser beam of sufficient power is reached.
Claim 2
Dependent Claim
97 words
A phase-conjugated Q-switched laser including: a starter cavity defined by opposed reflectors; a laser active material in said starter cavity; a pump for said laser active material; a side-arm containing a phase conjugate mirror consisting of a lens and a stimulated Brillouin scattering cell; means for optically coupling said starter cavity to said side-arm and including a quarterwave plate and a polarizer in said starter cavity, wherein said cell acts as a Q-switch by undergoing stimulated Brillouin scattering when the laser active material is pumped by said pump and a laser beam of sufficient power is reached.
Claim 3
Dependent Claim
17 words
The laser as set forth in claim 1 further including an iris diaphragm in said starter cavity.
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) | 1990-11-23 | 1991-05-25 | 1991-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-23 | 1995-05-25 | 1995-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-23 | 1999-05-25 | 1999-11-24 | $7700.00 | Window Closed / Lapsed |