US3865747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Q-switching device for glass lasers
Assignee: PPG Industries Inc
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Filing: 1970-08-21
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Granted: 1975-02-11
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Expires: 1990-08-21
Abstract
Abstract An improved Q-switched neodymium laser in which uranium as UO2 2 and a uranium oxidizing agent such as cerium in a host body such as glass serve as either an external or an internal Q-switching device for the laser.
Inventors
- 👤 Charles B Greenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:35
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/11; H01S3/1123; H01S3/113
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
A PROCESS FOR PRODUCING A SELF Q-SWITCHING DEVICE ADAPTED FOR USE IN A LASER COMPRISING: A. MELTING I. A MIXTURE CONSISTING ESSENTIALLY OF GLASS BATCH MATERIALS WHICH ARE SUBSTANTIALLY IRON-FREE, AND WHICH WHEN MELTED AND COOLED FORM A GLASS WHICH IS SUITABLE FOR LASER APPLICATIONS, II. A URANIUM SALT, AND III. CERIUM DIOXIDE, AND B. COOLING SAID MELT TO FORM A SOLID GLASS, SAID URANIUM SALT BEING PRESENT IN SAID SOLID GLASS IN AN AMOUNT SUFFICIENT TO PROVIDE A URANIUM SALT BEING PRESENT IN SAID SOLID GLASS IN AN AMOUNT SUFFICIENT TO PROVIDE A URANIUM CONTENT, EXPRESSED AS UO2+2, OF 0.01 PERCENT TO 15 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF SAID SOLID GLASS AND SAID CERIUM DIOXIDE BEING PRESENT IN AN AMOUNT SUFFICIENT TO CONVERT AT LEAST 91 PERCENT OF SAID URANIUM TO A UO2+2 VALENCE STATE.
Claim 2
Dependent Claim
139 words
A PROCESS FOR PRODUCING A SELF Q-SWITCHING DEVICE ADAPTED FOR USE IN A LASER COMPRISING: A. MELTING I. A MIXTURE CONSISTING ESSENTIALLY OF GLASS BATCH MATERIALS WHICH ARE SUBSTANTIALLY IRON-FREE, AND WHICH WHEN MELTED AND COOLED FORM A GLASS WHICH IS SUITABLE FOR LASER APPLICATIONS, II. A URANIUM SALT, AND III. CERIUM DIOXIDE, AND B. COOLING SAID MELT TO FORM A SOLID GLASS, SAID URANIUM SALT BEING PRESENT IN SAID SOLID GLASS IN AN AMOUNT SUFFICIENT TO PROVIDE A URANIUM SALT BEING PRESENT IN SAID SOLID GLASS IN AN AMOUNT SUFFICIENT TO PROVIDE A URANIUM CONTENT, EXPRESSED AS UO2+2, OF 0.01 PERCENT TO 15 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF SAID SOLID GLASS AND SAID CERIUM DIOXIDE BEING PRESENT IN AN AMOUNT SUFFICIENT TO CONVERT AT LEAST 91 PERCENT OF SAID URANIUM TO A UO2+2 VALENCE STATE.
Claim 3
Dependent Claim
23 words
The process according to claim 1 in which said cerium dioxide is present in an amount of 0.01 to 20 percent by weight.
Claim 4
Dependent Claim
12 words
A laser glass having substantially the following composition in percent by weight:
Claim 5
Dependent Claim
12 words
A laser glass having substantially the following composition in percent by weight:
Claim 6
Dependent Claim
131 words
A process for producing a self Q-switching device adapted for use in a laser comprising: a. melting a mixture consisting essentially of i. glass batch materials, which are substantially iron-free which when melted and cooled form a glass selected from the class consisting of barium crown glass, lime-soda-silica glass, high silica borosilicate glass, germanate glass, flint glass, and lead silicate glass, ii. UO2(NO3)2 . 6H2O iii. cerium dioxide, b. cooling said melt to form a solid glass, the UO2(NO3)2 . 6H2O being present in an amount sufficient to provide a solid glass having a uranium content expressed as UO2 2 of 0.01 to 15 percent by weight based on the weight of said solid glass and said cerium dioxide being present in an amount of 0.01 to 20 percent by weight.
Claim 7
Dependent Claim
131 words
A process for producing a self Q-switching device adapted for use in a laser comprising: a. melting a mixture consisting essentially of i. glass batch materials, which are substantially iron-free which when melted and cooled form a glass selected from the class consisting of barium crown glass, lime-soda-silica glass, high silica borosilicate glass, germanate glass, flint glass, and lead silicate glass, ii. UO2(NO3)2 . 6H2O iii. cerium dioxide, b. cooling said melt to form a solid glass, the UO2(NO3)2 . 6H2O being present in an amount sufficient to provide a solid glass having a uranium content expressed as UO2 2 of 0.01 to 15 percent by weight based on the weight of said solid glass and said cerium dioxide being present in an amount of 0.01 to 20 percent by weight.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |