US4562580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photolytic improvement of dye laser lifetimes
Assignee: United States Department of the Navy
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Filing: 1984-07-27
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Granted: 1985-12-31
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Expires: 2004-07-27
Abstract
Abstract The effective lasing lifetime of coumarin 102 in 50:50 ethylene glycol is significantly extended by increasing the rate of pumping and photolysis, with a flashlamp in a laser system having a pyrex ultraviolet filter and an inert cover gas.
Inventors
- 👤 Aaron N. Fletcher
- 👤 Richard H. Knipe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:10
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/091; H01S3/0915; H01S3/092; H01S3/095; H01S3/09505; H01S3/14; H01S3/20; H01S3/213
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
106 words
A method for photolytically extending the lifetime and output of dye lasers in a laser system comprising the steps of: placing a dye solution comprising a coumarin laser dye and a solvent into a dye laser cavity; screening said system from ultraviolet light with a pyrex filter; covering said dye solution with an inert gas; and increasing the rate of photolysis with a flashlamp which emits at a specific excitation wavelength that will photolyze products absorbing at the lasing wavelength and not photolyze that dye it self thereby increasing the energy input into said dye solution such that an increased output and dye lifetime are obtained.
Claim 2
Independent Claim
106 words
A method for photolytically extending the lifetime and output of dye lasers in a laser system comprising the steps of: placing a dye solution comprising a coumarin laser dye and a solvent into a dye laser cavity; screening said system from ultraviolet light with a pyrex filter; covering said dye solution with an inert gas; and increasing the rate of photolysis with a flashlamp which emits at a specific excitation wavelength that will photolyze products absorbing at the lasing wavelength and not photolyze that dye it self thereby increasing the energy input into said dye solution such that an increased output and dye lifetime are obtained.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein said inert gas is argon.
Claim 4
Dependent Claim
30 words
The method of claim 2 wherein said dye solution comprises coumarin dye laser 102 in a solvent of 50 percent by volume ethylene glycol and 50 percent by volume water.
Claim 5
Dependent Claim
18 words
The method of claim 2 wherein said dye solution comprises dye laser AC3F in a solvent of ethanol.
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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) | 1988-12-30 | 1989-07-01 | 1989-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-30 | 1993-07-01 | 1993-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-30 | 1997-07-01 | 1997-12-31 | $7700.00 | Window Closed / Lapsed |