US3573653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuously tunable thin film laser employing the electric field effect
Assignee: United States Department of the Navy
•
Filing: 1969-07-18
•
Granted: 1971-04-06
•
Expires: 1989-07-18
Abstract
Abstract A selectively tunable thin film laser comprises a source of excitation energy and a thin film of laser material positioned to intercept the excitation energy. Conductive means are positioned on either side of the laser material and insulated therefrom; a source of selectively variable electrical potential is connected to the conductive means to generate a variable electric field therebetween so as to tunably change the wavelength of the laser output.
Inventors
- 👤 Vern N Smiley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:59
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/102
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
20 words
A tunable thin film laser as claimed in claim 1 wherein said thin film of laser material is a semiconductor.
Claim 2
Dependent Claim
21 words
A tunable thin film laser as claimed in claim 1 wherein said excitation energy is a source of optical radiant energy.
Claim 3
Dependent Claim
24 words
A tunable thin film laser as claimed in claim 1 wherein said conductive and dielectric films transmit a substantial portion of said excitation energy.
Claim 4
Dependent Claim
66 words
A tunable thin film laser as claimed in claim 1 wherein the effective optical thickness of the cavity formed by said film of laser material and its covering films is such that only single mode lasing action is generated. 6 A tunable thin film laser as claimed in claim 1 adapted to accept an input signal as a tunable amplifier by operating below its oscillation threshold.
Claim 5
Dependent Claim
33 words
A tunable thin film laser as claimed in claim 6 wherein said input signal comprises optical energy within the wavelength region of the laser energy output of said thin film of laser material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |