Patent US4577323A successfully refreshed from Google Patents.
US4577323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
U Channel waveguide laser
Assignee: Demaria Electrooptics Systems Inc
•
Filing: 1983-09-06
•
Granted: 1986-03-18
•
Expires: 2003-09-06
Abstract
Abstract An improved RF-waveguide laser has a waveguide with an asymmetric cross section that provides improved suppression of high order modes and increased efficiency.
Inventors
- 👤 Leon A. Newman
- 👤 John T. Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:53
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/097; H01S3/0975; H01S3/02; H01S3/03; H01S3/0315
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
An RF-powered waveguide laser comprising: first and second electrodes having first and second parallel, facing electrode surfaces positioned on opposite sides of an optical axis; an insulating member positioned between said first and second parallel electrode surfaces and containing an optical waveguide disposed about said optic axis; reflective means for defining an optical cavity containing said waveguide; a gain medium disposed within said optical cavity; RF-pumping means for applying power to said electrodes for resonating, in at least one electromagnetic mode, laser radiation in said gain medium disposed within said optical cavity; characterized in that: said optical waveguide has a cross section perpendicular to said optic axis that is asymmetric about said optic axis.
Claim 2
Dependent Claim
114 words
An RF-powered waveguide laser comprising: first and second electrodes having first and second parallel, facing electrode surfaces positioned on opposite sides of an optical axis; an insulating member positioned between said first and second parallel electrode surfaces and containing an optical waveguide disposed about said optic axis; reflective means for defining an optical cavity containing said waveguide; a gain medium disposed within said optical cavity; RF-pumping means for applying power to said electrodes for resonating, in at least one electromagnetic mode, laser radiation in said gain medium disposed within said optical cavity; characterized in that: said optical waveguide has a cross section perpendicular to said optic axis that is asymmetric about said optic axis.
Claim 3
Dependent Claim
43 words
A laser according to claim 1, in which said asymmetric cross section has a semicircular region having a predetermined radius of curvature about said optic axis and a rectangular region extending a predetermined distance from said optic axis toward one of said electrodes.
Claim 4
Dependent Claim
19 words
A laser according to claim 2, in which said predetermined distance is substantially equal to said radius of curvature.
References Cited (Backward Citations)
US3939439A
Cited
US4464760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |