US4628513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunable indium UV anti-Stokes Raman laser
Assignee: Nokia Bell Labs
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Filing: 1985-08-22
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Granted: 1986-12-09
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Expires: 2005-08-22
Abstract
Abstract An anti-Stokes Raman laser is disclosed which is tunable in the ultraviolet (UV) by utilizing ground state neutral indium atoms as the lasing medium. A photodissociator is utilized to create a metastable indium population and a tunable dye laser is subsequently used to pump the metastable population to an intermediate level. Stimulated anti-Stokes Raman lasing occurs from this intermediate level, thereby generating anti-Stokes Raman emission at 410 nm. Since the dye laser is tunable, the Raman lasing output is tunable over a comparable range.
Inventors
- 👤 Jonathan C. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:29
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/30; H01S3/305; H01S3/10; H01S3/106; H01S3/108; H01S3/1086
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
A tunable anti-Stokes Raman laser comprising an indium compound lasing medium including at least one ground state, an intermediate state, and at least one metastable state; photodissociating means for creating a population inversion between said at least one ground state and a metastable state of said indium compound lasing medium; and anti-Stokes tunable pump means for creating a transition between said metastable state and a predetermined region near said intermediate state of said indium compound lasing medium, thereby creating a Raman lasing output from said predetermined region to said ground state, where said predetermined region is varied to form said tunable anti-Stokes Raman laser.
Claim 2
Dependent Claim
104 words
A tunable anti-Stokes Raman laser comprising an indium compound lasing medium including at least one ground state, an intermediate state, and at least one metastable state; photodissociating means for creating a population inversion between said at least one ground state and a metastable state of said indium compound lasing medium; and anti-Stokes tunable pump means for creating a transition between said metastable state and a predetermined region near said intermediate state of said indium compound lasing medium, thereby creating a Raman lasing output from said predetermined region to said ground state, where said predetermined region is varied to form said tunable anti-Stokes Raman laser.
Claim 3
Dependent Claim
100 words
A tunable anti-Stokes Raman laser formed in accordance with claim 1 wherein said laser further comprises a dichroic mirror capable of spatially overlapping and directing the output of both the photodissociating means and the anti-Stokes pump means towards the indium compound lasing medium; and time delay/synchronization means for separately initiating both said photodissociating means and said anti-Stokes pump means such that the output from said photodissociating means arrives at the indium compound lasing medium a predetermined time interval before the output of said synchronization means, thereby controlling the intensity of the Raman lasing output of said indium compound lasing medium.
Claim 4
Dependent Claim
42 words
A tunable anti-Stokes Raman laser formed in accordance with claim 2 wherein the photodissociating means comprises a KrF excimer laser responsive to the time delay/synchronization means for providing an emission at a predetermined wavelength capable of photodissociating the indium compound lasing medium.
Claim 5
Dependent Claim
25 words
A tunable anti-Stokes Raman laser formed in accordance with claim 3 wherein the KrF excimer laser is capable of producing laser radiation at 248 nm.
Claim 6
Dependent Claim
49 words
A tunable anti-Stokes Raman laser formed in accordance with claim 2 wherein the anti-Stokes pump means comprises a Nd:YAG pumped dye laser responsive to the time delay/synchronization means for providing an emission at a predetermined wavelength capable of moving a metastable population of indium to an intermediate energy level.
Claim 7
Dependent Claim
27 words
A tunable anti-Stokes Raman laser formed in accordance with claim 5 wherein the Nd:YAG pumped dye laser is capable of producing laser radiation at approximately 451 nm.
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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) | 1989-12-08 | 1990-06-09 | 1990-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-08 | 1994-06-09 | 1994-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-08 | 1998-06-09 | 1998-12-09 | $7700.00 | Window Closed / Lapsed |