US3906399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broad band exciplex dye lasers
Assignee: AT&T Inc
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Filing: 1972-11-09
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Granted: 1975-09-16
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Expires: 1992-11-09
Abstract
Abstract The disclosure is concerned with exciplex dye lasers, i.e., lasers in which the emitting species is a complex formed only from a constituent in an electronically excited state. Noting that an exciplex laser, favorable from the standpoint of broad tunability, results from a broad shift in the peak emission wavelength for the exciplex relative to the unreacted species, a desirable class resulting in such broad shift is described. Preferred classes of laser media utilizing specified resonant molecules are set forth.
Inventors
- 👤 Andrew Dienes
- 👤 Charles Vernon Shank
- 👤 Anthony Marion Trozzolo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:50
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
275 words
DYE LASEE COMPRISING A RESONANT CAVITY DEFINED BY TWO END MEMBERS AT LEAST ONE OF WHICH IS A PARTIALLY REFLECTING MEMBER THROUGH WHICH LASER OUTPUT IS TRANSMITTED, SAID CAVITY CONTAINING A MEDIUM CONSISTING ESSENTIALLY OF A SOLUTION OF AT LEAST TWO INGREDIENTS, ONE OF WHICH IN ITS UNMODIFIED STATE IS ELECTRONICALLY EXCITABLE TO A LASING STATE AND AT LEAST ONE OF WHICH REACTS WITH THE FIRST MENTIONED INGREDIENT IN ITS ELECTRONICALLY ACTIVE STATE TO PRODUCE AN EXIPLEX CAPABLE OF PRODUCING STIMULATED EMISSION, SAID LASER INCLUDING MEANS FOR PRODUCING A POPULATION INVERSION THEREIN TOGETHER WITH MEANS COUPLED TO SAID MEDIUM FOR STIMULATING THE EMISSION OF A COHERENT BEAM OF RADIATION FROM SAID POPULATION INVERTED MEDIUM, CHARACTERIZED IN THAT THE PEAK EMISSION WAVELENGTH OF THE SAID INGREDIENT IN ITS UNMODIFIED ELECTRONICALLY ACTIVE STATE AND THE PEAK EMISSION WAVELENGTH OF THE SAID EXCIPLEX ARE SEPARATED BY A WAVELENGTH CHANGE OF AT LEAST 500 ANGSTROM UNITS, AND IN WHICH THE SAID PARTIALLY REFLECTING MEMBER IS PARTIALLY REFLECTING OVER A BANDWIDTH INCLUDING THE PEAL EMISSION WAVELENGTH OF THE SAID EXCIPLEX, IN WHICH ONE INGREDIENT IS AN ELECTRON ACCEPTOR, AND IN WHICH A SECOND INGREDIENT IS AN ELECTRON DONOR, AND IN WHICH THE SAID ELECTRON ACCEPTOR IS SELECTED DROM THE GROUP CONSISTING OF UNSUBSTITUTED POLYCYCLIC AROMATIC HYDROCARBONS CONTAINING FROM 2 TO 5 RINGS AS WELL AS MONOALKYL DIALKYL AND MONOCHLORO DERIVATIVES THEREOF, AND THE ELECTRON DONOR IS SELECTED FROM THE GROUP CONSISTING OF TERTIARY AMINES SELECTED FROM THE GROUP CONSISTING OF X-N-Y2 AND Y2N-Z-NY2 WHERE X IS PHENYL OR NAPHTHYL, Y IS AN ALKYL GROUPING AND Z IS PHENYLENE, NAPHTHYLENE OR BIPHENYLENE SO AS TO TRANSMIT LASER OUTPUT OVER SUCH BANDWIDTH.
Claim 2
Dependent Claim
275 words
DYE LASEE COMPRISING A RESONANT CAVITY DEFINED BY TWO END MEMBERS AT LEAST ONE OF WHICH IS A PARTIALLY REFLECTING MEMBER THROUGH WHICH LASER OUTPUT IS TRANSMITTED, SAID CAVITY CONTAINING A MEDIUM CONSISTING ESSENTIALLY OF A SOLUTION OF AT LEAST TWO INGREDIENTS, ONE OF WHICH IN ITS UNMODIFIED STATE IS ELECTRONICALLY EXCITABLE TO A LASING STATE AND AT LEAST ONE OF WHICH REACTS WITH THE FIRST MENTIONED INGREDIENT IN ITS ELECTRONICALLY ACTIVE STATE TO PRODUCE AN EXIPLEX CAPABLE OF PRODUCING STIMULATED EMISSION, SAID LASER INCLUDING MEANS FOR PRODUCING A POPULATION INVERSION THEREIN TOGETHER WITH MEANS COUPLED TO SAID MEDIUM FOR STIMULATING THE EMISSION OF A COHERENT BEAM OF RADIATION FROM SAID POPULATION INVERTED MEDIUM, CHARACTERIZED IN THAT THE PEAK EMISSION WAVELENGTH OF THE SAID INGREDIENT IN ITS UNMODIFIED ELECTRONICALLY ACTIVE STATE AND THE PEAK EMISSION WAVELENGTH OF THE SAID EXCIPLEX ARE SEPARATED BY A WAVELENGTH CHANGE OF AT LEAST 500 ANGSTROM UNITS, AND IN WHICH THE SAID PARTIALLY REFLECTING MEMBER IS PARTIALLY REFLECTING OVER A BANDWIDTH INCLUDING THE PEAL EMISSION WAVELENGTH OF THE SAID EXCIPLEX, IN WHICH ONE INGREDIENT IS AN ELECTRON ACCEPTOR, AND IN WHICH A SECOND INGREDIENT IS AN ELECTRON DONOR, AND IN WHICH THE SAID ELECTRON ACCEPTOR IS SELECTED DROM THE GROUP CONSISTING OF UNSUBSTITUTED POLYCYCLIC AROMATIC HYDROCARBONS CONTAINING FROM 2 TO 5 RINGS AS WELL AS MONOALKYL DIALKYL AND MONOCHLORO DERIVATIVES THEREOF, AND THE ELECTRON DONOR IS SELECTED FROM THE GROUP CONSISTING OF TERTIARY AMINES SELECTED FROM THE GROUP CONSISTING OF X-N-Y2 AND Y2N-Z-NY2 WHERE X IS PHENYL OR NAPHTHYL, Y IS AN ALKYL GROUPING AND Z IS PHENYLENE, NAPHTHYLENE OR BIPHENYLENE SO AS TO TRANSMIT LASER OUTPUT OVER SUCH BANDWIDTH.
Claim 3
Dependent Claim
220 words
Dye laser comprising a resonant cavity defined by two end members at least one of which is a partially reflecting member through which laser output is transmitted, said cavity containing a medium consisting essentially of a solution of at least two ingredients, one of which in its unmodified state is electronically excitable to a lasing state and at least one of which reacts with the first mentioned ingredient in its electronically active state to produce an exciplex capable of producing stimulated emission, said laser including means for producing a population inversion therein together with means coupled to said medium for stimulating the emission of a coherent beam of radiation from said population inverted medium, characterized in that the peak emission wavelength of the said ingredient in its unmodified electronically active state and the peak emission wavelength of the said exciplex are separated by a wavelength change of at least 500 Angstrom units, and in which the said partially reflecting member is partially reflecting over a bandwidth including the peak emission wavelength of the said exciplex, in which one ingredient is a compound which is protonated in its excited singlet state and in which a second ingredient results in a medium of acidic pH, and in which one of the mentioned ingredients is a compound selected from the group consisting of
Claim 4
Dependent Claim
220 words
Dye laser comprising a resonant cavity defined by two end members at least one of which is a partially reflecting member through which laser output is transmitted, said cavity containing a medium consisting essentially of a solution of at least two ingredients, one of which in its unmodified state is electronically excitable to a lasing state and at least one of which reacts with the first mentioned ingredient in its electronically active state to produce an exciplex capable of producing stimulated emission, said laser including means for producing a population inversion therein together with means coupled to said medium for stimulating the emission of a coherent beam of radiation from said population inverted medium, characterized in that the peak emission wavelength of the said ingredient in its unmodified electronically active state and the peak emission wavelength of the said exciplex are separated by a wavelength change of at least 500 Angstrom units, and in which the said partially reflecting member is partially reflecting over a bandwidth including the peak emission wavelength of the said exciplex, in which one ingredient is a compound which is protonated in its excited singlet state and in which a second ingredient results in a medium of acidic pH, and in which one of the mentioned ingredients is a compound selected from the group consisting of
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |