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US3755757A
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High efficiency erbium glass laser
Assignee: American Optical Corp
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Filing: 1972-06-23
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Granted: 1973-08-28
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Expires: 1992-06-23
Abstract
Abstract An optimized erbium glass laser device for utilization in the range from 50 to 100 millijoules (mJ) output power is defined. This device includes a concentration of Er2O3 in the core of a clad glass laser rod in the range of about 0.20-0.25 weight percent in combination with a Yb2O3 concentration of approximately 15 weight percent in a silicate base glass. The optimal cladding glass composition contains approximately 4-5 weight percent each of Nd2O3 and Yb2O3.
Inventors
- 👤 R Woodcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:31
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/095; C03C4/00; C03C4/0071; H; H01; H01S; H01S3/00; H01S3/14; H01S3/16; H01S3/17
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
34 words
An erbium glass laser device according to claim 1, wherein the glass cladding additionally contains Y2O3 in a concentration of approximately 5 weight percent to balance thermal expansion rates between the core and cladding.
Claim 2
Dependent Claim
50 words
An erbium glass laser device according to claim 2, wherein the core and cladding are each formed of a base glass into which the active and sensitizer ions are doped, the base glass having essentially the following composition given in weight percent: SiO2 71.4Na2O 7.6K2O 11.6BaO 5.1Al2O3 1.6ZnO 1.6Li2O 1.1
Claim 3
Dependent Claim
35 words
An erbium glass laser device according to claim 3, wherein the following additional sensitizer ions are included within the glass cladding in the associated ranges of concentrations given in weight percent: Cr2O3 0-0.2 UO2 0-0.2
Claim 4
Dependent Claim
34 words
An erbium glass laser device according to claim 3, wherein the associated optical pumping means includes at least one flashlamp having a diameter equal to or less than the diameter of the glass core.
Claim 5
Dependent Claim
50 words
An erbium glass laser device according to claim 5, additionally including a pair of resonant cavity reflectors disposed at opposite ends of the glass core, one of the reflectors being the output reflector and having a reflectance to energy at a wavelength of 1.54 micrometers of at least 80 percent.
Claim 6
Dependent Claim
42 words
An erbium glass laser device accoridng to claim 6, wherein the glass core has a maximum length of 50 millimeters and a diameter of approximately 6 millimeters, and the glass cladding has a thickness in the range from 0.5 to 0.75 millimeters.
References Cited (Backward Citations)
US3590004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |