US3577098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally compensated laser
Assignee: Raytheon Co
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Filing: 1968-07-01
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Granted: 1971-05-04
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Expires: 1988-07-01
Abstract
Abstract The invention is a laser in which an undesired thermal lensing effect of the active laser material is compensated by an addition of a material having a thermal lensing characteristic opposite that characteristic of the laser material. The active laser element and the compensating element are disposed within a regenerative cavity in a regenerative path defined between two end reflectors. As the active laser element is excited by pump energy, a thermal gradient in the laser material results from the excitation and a similar thermal gradient also results in the compensating material to negate the aforementioned thermal lensing effect.
Inventors
- 👤 Harvey V Winston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:25
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/04; H01S3/042; H01S3/10; H01S3/13; H01S3/136; H01S3/05; H01S3/08; H01S3/08072
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
30 words
A thermally compensated laser according to claim 1, wherein said second material has been doped with impurities to obtain an absorption spectrum equal to that of said active laser material.
Claim 2
Dependent Claim
35 words
A thermally compensated laser according to claim 2, wherein the length of said second material is determined by the product of the ratio (- Alpha l/ Alpha c) and the length of said active material.
Claim 3
Dependent Claim
37 words
A thermally compensated laser according to claim 1, wherein means coupled to said second material for maintaining a temperature distribution in said second material approximately equal to a temperature distribution in said active laser material are provided.
Claim 4
Dependent Claim
22 words
A thermally compensated laser according to claim 3, wherein said active laser material is Nd :YAG; and said second material is polystyrene.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |