Patent US3873940A successfully refreshed from Google Patents.
US3873940A
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Laser media containing rigidized dyes
Assignee: Eastman Kodak Co
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Filing: 1971-08-09
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Granted: 1975-03-25
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Expires: 1991-08-09
Abstract
Abstract Dyes containing at least one rigidized chromophoric nitrogen atom which is part of one or two fused 5-, 6- or 7- membered heterocyclic ring structures are useful as laser dyes. These dyes are used in solution with a non-interfering solvent to form lasing media useful in dye lasers. Such lasers generally include a reservoir for containing the laser dye solution and a pumping energy source operably associated therewith for producing stimulated emission of the dye solution.
Inventors
- 👤 Karl H Drexhage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:35
CPC Classifications
C; C07; C07D; C07D491/00; C07D491/22; C09; C09B; C09B57/00; H; H01; H01S; H01S3/00; H01S3/14; H01S3/20; H01S3/213
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
A METHOD OF PRODUCING COHERENT LASER EMISSION IN THE OPERATION OF A DYE LASER COMPRISING A PUMPING ENERGY SOURCE OPERABLY COUPLED WITH A LASER DYE SOLUTION FOR PRODUCING A POPULATION INVERSION THEREIN AND MEANS COUPLED WITH THE POPULATION INVERTED LASER DYE SOLUTION TO STIMULATE THEREIN THE EMISSION OF A COHERENT BEAM OF RADIATION, SAID METHOD COMPRISING THE STEPS OF OPTICALLY PUMPING A LASER DYE SOLUTION TO PRODUCE A POPULATION INVERSION IN SAID SOLUTION AND STIMULATING IN THE POPULATION INVERTED SOLUTION EMISSION OF A COHERENT BEAM OF RADIATION, WHEREIN SAID SOLUTION CONTAINS BETWEEN ABOUT 10**-2 AND ABOUT 10**-4 MOLAR CONCENTRATION OF A LASING DYE IN A NON-INTERFERING SOLVENT, SAID DYE BEING SELECTED FROM THE GROUP OF MATERIALS HAVING THE FORMULAS AS FOLLOWS:
Claim 2
Independent Claim
121 words
A METHOD OF PRODUCING COHERENT LASER EMISSION IN THE OPERATION OF A DYE LASER COMPRISING A PUMPING ENERGY SOURCE OPERABLY COUPLED WITH A LASER DYE SOLUTION FOR PRODUCING A POPULATION INVERSION THEREIN AND MEANS COUPLED WITH THE POPULATION INVERTED LASER DYE SOLUTION TO STIMULATE THEREIN THE EMISSION OF A COHERENT BEAM OF RADIATION, SAID METHOD COMPRISING THE STEPS OF OPTICALLY PUMPING A LASER DYE SOLUTION TO PRODUCE A POPULATION INVERSION IN SAID SOLUTION AND STIMULATING IN THE POPULATION INVERTED SOLUTION EMISSION OF A COHERENT BEAM OF RADIATION, WHEREIN SAID SOLUTION CONTAINS BETWEEN ABOUT 10**-2 AND ABOUT 10**-4 MOLAR CONCENTRATION OF A LASING DYE IN A NON-INTERFERING SOLVENT, SAID DYE BEING SELECTED FROM THE GROUP OF MATERIALS HAVING THE FORMULAS AS FOLLOWS:
Claim 3
Dependent Claim
12 words
A method according to claim 1 wherein said dye has the formula:
Claim 4
Dependent Claim
12 words
A method according to claim 1 wherein said dye has the formula:
Claim 5
Dependent Claim
12 words
A method according to claim 1 wherein said dye has the formula:
Claim 6
Independent Claim
136 words
A method of producing coherent laser emission in the operation of a dye laser comprising a pumping energy source operably coupled with a laser dye solution for producing a population inversion therein and means coupled with the population inverted laser dye solution to stimulate therein the emission of a coherent beam of radiation, said method comprising the steps of optically pumping a laser dye solution to produce a inversion in said solution and stimulating in the population inversion solution emission of a coherent beam of radiation, wherein said solution contains between about 10 2 and about 10 4 molar concentration of a lasing dye in a noninterfering solvent, said dye being selected from the group consisting of 9-alkyl-2,3, 6,7-tetrahydro-1H,5H-quinolizino(1,9-gh)coumarin, 2,3,6,7,10, 11-hexahydro-1H,5H,9H-quinolizino-(1,9-gh)cyclopenta(c)-coumarin and salts of 2-(2-carboxy-phenyl)-2,3,6,7,12,13,16,17-octahydro-1H, 5H,11H,15H- diquinolizino-(1,9-bc:1'', 9''-hi)xanthylium, 2,3,6,7, 12,13,16,17-octahydro-1H,5H,11H,15H-diquinolizino-(1,9-bc:1:1'', 9''-hi)-xanthylium and 3-alkyl-4-alkyl-2-( Beta -(9-2,3,6,7-tetrahydro1H,5H-pyrido-(3,2,1-ij)quinolyl)vinyl) thiazolium.
Claim 7
Independent Claim
136 words
A method of producing coherent laser emission in the operation of a dye laser comprising a pumping energy source operably coupled with a laser dye solution for producing a population inversion therein and means coupled with the population inverted laser dye solution to stimulate therein the emission of a coherent beam of radiation, said method comprising the steps of optically pumping a laser dye solution to produce a inversion in said solution and stimulating in the population inversion solution emission of a coherent beam of radiation, wherein said solution contains between about 10 2 and about 10 4 molar concentration of a lasing dye in a noninterfering solvent, said dye being selected from the group consisting of 9-alkyl-2,3, 6,7-tetrahydro-1H,5H-quinolizino(1,9-gh)coumarin, 2,3,6,7,10, 11-hexahydro-1H,5H,9H-quinolizino-(1,9-gh)cyclopenta(c)-coumarin and salts of 2-(2-carboxy-phenyl)-2,3,6,7,12,13,16,17-octahydro-1H, 5H,11H,15H- diquinolizino-(1,9-bc:1'', 9''-hi)xanthylium, 2,3,6,7, 12,13,16,17-octahydro-1H,5H,11H,15H-diquinolizino-(1,9-bc:1:1'', 9''-hi)-xanthylium and 3-alkyl-4-alkyl-2-( Beta -(9-2,3,6,7-tetrahydro1H,5H-pyrido-(3,2,1-ij)quinolyl)vinyl) thiazolium.
Claim 8
Dependent Claim
12 words
A method according to claim 5 wherein said dye is 9-methyl-2, 3,6,7-tetrahydro-1H,5H-quinolizino(1,9-gh)-coumarin.
References Cited (Backward Citations)
US3541470A
Cited
US3521187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |