Title:
GAIN BOOST WITH SYNCHRONIZED MULTIPLE WAVELENGTH PUMPING IN A SOLID-STATE LASER
Document Type and Number:
WIPO Patent Application WO2005046010
Kind Code:
A3
Abstract:
A solid-state eye-safe laser with gain boost by dual-wavelength, synchronized, pumplights. The laser includes a medium (47) doped with ions that emit light (62) at a laser wavelength as a result of the transition of electron energy from an upper energy level manifold to a lower energy level manifold. A first pumplight (56) couples energy into the medium (47) at a first wavelength that excites a first portion of the ions into said upper energy level manifold. A second pumplight (52) couples energy into said medium (47) at a second wavelength that excites a second portion of the ions to a third energy level manifold. A fraction of the ions relax to the upper energy level manifold and thereby increase the gain of the laser (2). The laser may be an erbium crystal laser, using yttriumÂaluminum-garnet operating near 1640 nanometers. A second ion, such as ytterbium, may be diffused into the lasing medium (47), and an inter-ionic energy transfer employed to coupled the second pumplight (52) energy to the upper level energy manifold of he laser transition.
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Inventors:
SPARIOSU KALIN
BIRNBAUM MILTON
BIRNBAUM MILTON
Application Number:
PCT/US2004/026015
Publication Date:
July 14, 2005
Filing Date:
August 11, 2004
Export Citation:
Assignee:
RAYTHEON CO (US)
International Classes:
H01S3/06; H01S3/067; H01S3/094; H01S3/0941; H01S3/00; H01S3/042; H01S3/11; H01S3/16; (IPC1-7): H01S3/067; H01S3/094
Foreign References:
| EP1039593A2 | 2000-09-27 | |||
| US5594747A | 1997-01-14 | |||
| US6028977A | 2000-02-22 |
Other References:
SPARIOSU K ET AL: "Room-temperature 1.643-[mu]m Er<3+>:Y3Sc2Ga3O12 (Er:YSGG) laser", APPLIED OPTICS OPT. SOC. AMERICA USA, vol. 34, no. 36, 20 December 1995 (1995-12-20), pages 8272 - 8275, XP002324719, ISSN: 0003-6935
NIKOLOV S ET AL: "Diode pumped erbium lasers at 1.55 [mu]m and 1.64 [mu]m in single frequency operation", PROCEEDINGS OF THE SPIE - THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING SPIE-INT. SOC. OPT. ENG USA, vol. 2772, 1996, pages 78 - 84, XP002324720, ISSN: 0277-786X
KACZMAREK F ET AL: "Kinetics of Er<3+>-doped fluorozirconate optical fiber upconversion fluorescence and laser emission under 800 nm excitation", APPLIED PHYSICS B (LASERS AND OPTICS) SPRINGER-VERLAG GERMANY, vol. B73, no. 2, August 2001 (2001-08-01), pages 125 - 128, XP002324721, ISSN: 0946-2171
RUIKUN WU ET AL: "Characteristics of diode-pumping erbium ytterbium-doped glass laser", PROCEEDINGS OF THE SPIE - THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING SPIE-INT. SOC. OPT. ENG USA, vol. 2986, 1997, pages 16 - 18, XP002324722, ISSN: 0277-786X
NIKOLOV S ET AL: "Diode pumped erbium lasers at 1.55 [mu]m and 1.64 [mu]m in single frequency operation", PROCEEDINGS OF THE SPIE - THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING SPIE-INT. SOC. OPT. ENG USA, vol. 2772, 1996, pages 78 - 84, XP002324720, ISSN: 0277-786X
KACZMAREK F ET AL: "Kinetics of Er<3+>-doped fluorozirconate optical fiber upconversion fluorescence and laser emission under 800 nm excitation", APPLIED PHYSICS B (LASERS AND OPTICS) SPRINGER-VERLAG GERMANY, vol. B73, no. 2, August 2001 (2001-08-01), pages 125 - 128, XP002324721, ISSN: 0946-2171
RUIKUN WU ET AL: "Characteristics of diode-pumping erbium ytterbium-doped glass laser", PROCEEDINGS OF THE SPIE - THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING SPIE-INT. SOC. OPT. ENG USA, vol. 2986, 1997, pages 16 - 18, XP002324722, ISSN: 0277-786X
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