Patent US3787234A successfully refreshed from Google Patents.
US3787234A
Expired / Lapsed
US
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Method of producing a thin film laser
Assignee: United States Department of the Navy
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Filing: 1969-07-18
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Granted: 1974-01-22
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Expires: 1989-07-18
Abstract
Abstract A thin layer of laser material is deposited on an appropriate substrate with a second layer of a suitable activator material such as silver or copper, for example, deposited thereover. The deposition of laser material is accomplished at as high a temperature as possible while maintaining a practicable deposition rate. The combination of layers is then baked at a high temperature in air or an inert atmosphere for several hours and slowly reduced to room temperature. The method transforms the film of laser material into a single crystal or several smaller crystallites capable of desirable laser action. In its preferred embodiment reflective coatings, anti-reflective coatings, and multi-layers may be employed to enhance the laser performance.
Inventors
- 👤 V Smiley
- 👤 A Lewis
- 👤 D Forbes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:38
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/10; H01S5/18; H01S5/183; H01S5/18361; H01S5/18369; C; C30; C30B; C30B1/00; C30B1/02; C30B29/00; C30B29/10; C30B29/46; C30B29/48; H01S5/30; H01S5/32; H01S5/3222
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
22 words
A method of producing a thin film laser as claimed in claim 1 wherein said resultant film is in single crystal form.
Claim 2
Dependent Claim
21 words
A method of producing a thin film laser as claimed in claim 1 wherein said resultant film is in crystallite form.
Claim 3
Dependent Claim
24 words
A method of producing a thin film laser as claimed in claim 1 wherein said laser material is a Group II - VI semiconductor.
Claim 4
Dependent Claim
19 words
A method of producing a thin film laser as claimed in claim 1 wherein said activator material is silver.
Claim 5
Dependent Claim
19 words
A method of producing a thin film laser as claimed in claim 1 wherein said activator material is copper.
Claim 6
Dependent Claim
21 words
A method of producing a thin film laser as claimed in claim 1 wherein said deposited layers are baked in air.
Claim 7
Dependent Claim
23 words
A method of producing a thin film laser as claimed in claim 1 wherein said deposited layers are baked in an inert atmosphere.
Claim 8
Dependent Claim
25 words
A method of producing a thin film laser as claimed in claim 1 wherein said layer of laser material is deposited by evaporation in vacuum.
Claim 9
Dependent Claim
29 words
A method of producing a thin film laser as claimed in claim 1 wherein said layer of laser material is deposited by sputtering in a low pressure gaseous medium.
Claim 10
Dependent Claim
25 words
A method of producing a thin film laser as claimed in claim 1 wherein said layer of laser material is deposited from a liquid solution.
Claim 11
Dependent Claim
36 words
A method of producing a thin film laser as claimed in claim 1 preceded by the step of depositing an anti-reflective film and followed by the step of depositing an anti-reflective film upon the resultant film.
Claim 12
Dependent Claim
31 words
A method of producing a thin film laser as claimed in claim 1 preceded by the steps of depositing several alternately high and low index of refraction, quarter-wavelength thick, dielectric layers.
Claim 13
Dependent Claim
32 words
A method of producing a thin film laser as claimed in claim 13 and followed by the steps of depositing several alternately high and low index of refraction, quarter-wavelength thick, dielectric layers.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |