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US4103256A
Expired / Lapsed
US
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Azacoumarin dye lasers
Assignee: United States Department of Energy
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Filing: 1976-05-25
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Granted: 1978-07-25
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Expires: 1996-05-25
Abstract
Abstract A dye laser comprising a laser dye solution of a compound having the general structure: ##STR1## wherein at least one of the 5, 6 and 8 ring positions is occupied by a nitrogen atom in lieu of the corresponding CR group and X is OH, alkoxy, or amino including amino substituted by at least one of the following: alkyl, aryl, acyl, aracyl, a group which taken together with the nitrogen atom of the amino group forms a heterocyclic ring, or part of one or two 5 or 6 membered aliphatic heterocyclic rings attached to ring A at positions 6 or 8 or both depending on where the N in ring A is located. R 3 , R 4 , R 5 , R 6 and R 8 are hydrogen or other groups as defined below. The compounds lase in the blue-green to near ultraviolet region.
Inventors
- 👤 Peter R. Hammond
- 👤 Ronald L. Atkins
- 👤 Ronald A. Henry
- 👤 Aaron N. Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:06
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/20; H01S3/213; C; C09; C09B; C09B57/00; C09B57/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
71 words
A dye laser comprising a laser dye solution and a pumping energy source operably coupled therewith and capable of producing stimulated emission of the dye solution, said dye solution comprising a lasing concentration in a non-interfering solvent, of a dye having the following formula ##STR8## wherein R 3 is hydrogen; R 4 is hydrogen, methyl, or trifluoromethyl; R 5 and R 6 are hydrogen; and X is hydroxy, dimethylamino, or morpholino.
Claim 2
Dependent Claim
71 words
A dye laser comprising a laser dye solution and a pumping energy source operably coupled therewith and capable of producing stimulated emission of the dye solution, said dye solution comprising a lasing concentration in a non-interfering solvent, of a dye having the following formula ##STR8## wherein R 3 is hydrogen; R 4 is hydrogen, methyl, or trifluoromethyl; R 5 and R 6 are hydrogen; and X is hydroxy, dimethylamino, or morpholino.
Claim 3
Dependent Claim
13 words
A dye laser accordinng to claim 1 wherein the lasing dye is 7-hydroxy-4-methyl-8-azacoumarin.
Claim 4
Dependent Claim
13 words
A dye laser according to claim 1 wherein the lasing dye is 7-dimethylamino-4-methyl-8-azacoumarin.
Claim 5
Dependent Claim
13 words
A dye laser according to claim 1 wherein the lasing dye is 7-morpholino-4-methyl-8-azacoumarin.
Claim 6
Dependent Claim
13 words
A dye laser according to claim 1 wherein the lasing dye is 7-morpholino-4-trifluoromethyl-8-azacoumarin.
Claim 7
Independent Claim
52 words
A method for producing a coherent laser beam which comprises stimulating the emission of energy from molecules of a lasing compound having the following formula ##STR9## wherein R 3 is hydrogen; R 4 is hydrogen, methyl, or trifluoromethyl; R 5 and R 6 are hydrogen; an X is hydroxy, dimethylamino, or morpholino.
Claim 8
Independent Claim
52 words
A method for producing a coherent laser beam which comprises stimulating the emission of energy from molecules of a lasing compound having the following formula ##STR9## wherein R 3 is hydrogen; R 4 is hydrogen, methyl, or trifluoromethyl; R 5 and R 6 are hydrogen; an X is hydroxy, dimethylamino, or morpholino.
Claim 9
Dependent Claim
12 words
A method according to claim 6 wherein the lasing compound is 7-hydroxy-4-methyl-8-azacoumarin.
Claim 10
Dependent Claim
12 words
A method according to claim 6 wherein the lasing compound is 7-dimethylamino-4-methyl-8-azacoumarin.
Claim 11
Dependent Claim
12 words
A method according to claim 6 wherein the lasing compound is 7-morpholino-4-methyl-8-azacoumarin.
Claim 12
Dependent Claim
12 words
A method according to claim 6 wherein the lasing compound is 7-morpholino-4-trifluoromethyl-8-azacoumarin.
Claim 13
Dependent Claim
62 words
A method according to claim 6 wherein stimulated emission is achieved by optically pumping a laser gain medium comprising an amount of said lasing compound effective for the support of lasing in a non-interfering solvent to produce an energy population inversion in the lasing compound sufficient for laser action and stimulating the production of said laser beam in an optically resonant cavity.
References Cited (Backward Citations)
US3891569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-24 | 1982-01-23 | 1982-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-24 | 1986-01-23 | 1986-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-24 | 1990-01-23 | 1990-07-25 | $7700.00 | Window Closed / Lapsed |