US4899347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state laser gain medium with diamond coating
Assignee: General Electric Co
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Filing: 1989-05-11
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Granted: 1990-02-06
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Expires: 2009-05-11
Abstract
Abstract A laser gain medium has a diamond coating in order to strengthen it and reduce parasitic oscillations. The medium can be a slab with chamfered corners with the coating on the edge faces and the corners, or a rod with the coating going all the way around it to eliminate stress corrosion and provide a compressive stress. The medium can be Nd:YAG and the coating can have a parasitic absorbing dopant. In a laser, the length of the coating preferably is the same as the length of the medium. For the slab, siderails can be used with a length slightly shorter than that of the coating.
Inventors
- 👤 Norman R. Kuchar
- 👤 Farzin H. Azad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:00
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/0602; H01S3/061; H01S3/09; H01S3/091; H01S3/0915; H01S3/092; H01S3/02; H01S3/04; H01S3/0407; H01S3/0612; H01S3/0619; H01S3/0625; H01S3/08; H01S3/08072
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
38 words
An article comprising: a solid state laser gain medium having an outer surface, and means for reinforcing said medium and for reducing parasitic oscillations comprising a diamond coating disposed on at least a portion of said outer surface.
Claim 2
Dependent Claim
38 words
An article comprising: a solid state laser gain medium having an outer surface, and means for reinforcing said medium and for reducing parasitic oscillations comprising a diamond coating disposed on at least a portion of said outer surface.
Claim 3
Dependent Claim
14 words
The article of claim 1 wherein said outer surface has a substantially circular portion.
Claim 4
Dependent Claim
16 words
The article of claim 2 wherein said coating is disposed around all of said circular portion.
Claim 5
Dependent Claim
28 words
The article of claim 1 wherein said outer surface has a substantially rectangular portion having a pair of opposing edge faces and a pair of opposing pump faces.
Claim 6
Dependent Claim
21 words
The article of claim 4 wherein said medium has chamfered corners, said coating being disposed on said corners and edge faces.
Claim 7
Dependent Claim
13 words
The article of claim 4 wherein said coating is disposed on edge faces.
Claim 8
Dependent Claim
13 words
The article of claim 1 wherein said coating comprises a parasitic absorbing dopant.
Claim 9
Dependent Claim
10 words
The article of claim 7 wherein said dopant comprises Cu.
Claim 10
Dependent Claim
10 words
The article of claim 7 wherein said dopant comprises Sm.
Claim 11
Dependent Claim
49 words
A laser comprising: a longitudinal laser medium having an outer surface; a diamond coating disposed on at least a portion of said outer surface for a given length; at least a first optical pumping means for illuminating said medium; and a reflector surrounding said medium and said pumping means.
Claim 12
Dependent Claim
49 words
A laser comprising: a longitudinal laser medium having an outer surface; a diamond coating disposed on at least a portion of said outer surface for a given length; at least a first optical pumping means for illuminating said medium; and a reflector surrounding said medium and said pumping means.
Claim 13
Dependent Claim
21 words
The laser of claim 10 wherein said pumping means has a length slightly less than said given length of said coating.
Claim 14
Dependent Claim
44 words
The laser of claim 10 wherein said medium comprises a slab having a pair of opposing edge faces and a pair of opposing pump faces, said first pumping means illuminating one of said pump faces, and further comprising siderails disposed on said edge faces.
Claim 15
Dependent Claim
20 words
The laser of claim 12 wherein said siderails have a length slightly less than said given length of said coating.
Claim 16
Dependent Claim
60 words
The laser of claim 12 further comprising first and second transparent plates respectively disposed proximate said medium, said first plate being disposed between said first pumping means and said medium; and a second optical pumping means for illuminating the remaining pump face and disposed in said reflector, said second plate being disposed between said second pumping means and said slab.
Claim 17
Dependent Claim
13 words
The laser of claim 10 further comprising a coolant disposed between said plates.
Claim 18
Dependent Claim
13 words
The laser of claim 10 wherein said optical pumping means comprises a lamp.
Claim 19
Dependent Claim
33 words
The laser of claim 10 wherein said medium comprises a slab having a pair of opposing edge faces and a pair of opposing pump faces, said coating being disposed on said edge faces.
Claim 20
Dependent Claim
18 words
The laser of claim 16 wherein said medium has chamfered corners, said coating being disposed on said corners.
Claim 21
Dependent Claim
28 words
The laser of claim 10 wherein said medium is a rod having a substantially circular outer surface, said coating being disposed around all of said circular outer surface.
Claim 22
Dependent Claim
13 words
The laser of claim 10 wherein said coating comprises a parasitic absorbing dopant.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |