Coherent light generators – Particular pumping means – Pumping with optical or radiant energy
Reexamination Certificate
2006-05-16
2006-05-16
Harvey, Min Sun (Department: 2828)
Coherent light generators
Particular pumping means
Pumping with optical or radiant energy
C372S005000, C372S010000, C372S039000, C372S069000
Reexamination Certificate
active
07046710
ABSTRACT:
A solid-state eye-safe laser and method with gain boost by dual-wavelength, synchronized pumplights. The laser includes a medium doped with ions that emit light 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 couples energy into the medium at a first wavelength that excites a first portion of the ions into said upper energy level manifold. A second pumplight couples energy into said medium 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 yttrium-aluminum-garnet operating near 1640 nanometers. A second ion, such as ytterbium, may be diffused into the lasing medium, and an inter-ionic energy transfer employed to coupled the second pumplight energy to the upper level energy manifold of he laser transition.
REFERENCES:
patent: 4477906 (1984-10-01), Case
patent: 4585944 (1986-04-01), Teraoka
patent: 5247529 (1993-09-01), Heidemann
patent: 5426656 (1995-06-01), Tohmon et al.
patent: 5594747 (1997-01-01), Ball
patent: 6002697 (1999-12-01), Govorkov et al.
patent: 6028977 (2000-02-01), Newsome et al.
patent: 6278719 (2001-08-01), Ohishi et al.
patent: 6407853 (2002-06-01), Samson et al.
patent: 6810052 (2004-10-01), Chicklis et al.
patent: 6891878 (2005-05-01), Spariosu et al.
patent: 2004/0240488 (2004-12-01), Okada et al.
patent: 1 039 593 (2000-09-01), None
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, pp. 78-84, XP002324720, ISSN: 0277-786X.
Kaczmarek, F. et al.: “Kinectics 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. 873, No. 2, Aug. 2001, pp. 125-128, XP002324721.
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, pp. 16-18, XP0023024722, ISSN: 0277-786X.
T.Yanagisawa, K.Asake, K.Hamazu, and Y.Hirano, “11-mJ, 15 Hz single frequency diode-pumped Q-switched Er, Yb:phosphate glass laser”, Optics Lett. 26(16), 1262-1264, (2001).
A. Levoshkin, A.Petrov, and J.E.Montagne, “High-efficiency diode-pumped Q-switched Yb:Er:glass laser”, Optics Communications, 185, 399-405 (2000).
T.Schweizer, T.Jensen, E. Heumann, and G.Huber, “Spectroscopic poperties and diode pumped 1.6 mm performance in Yb-codoped Er:Y3A15O12 and Er:Y2SiO5”, Optics Communications, 118, 557-561 (1995).
K. Spariosu, M. Birnbaum, and B. Viana, “Er3+:Y3A15O12 laser dynamics: effects of upconversion”, J. Opt. Soc. Am. B, 11(5), 894-900, (1994).
K. Spariosu and M. Birnbaum, “Intracavity 1.549 mm pumped 1.634 mm Er:YAG Lasers at 300 K”, IEEE J. Quantum Electron. 30(4), 1044-1049, (1994).
J. J. Degnan, “Theory of optimally coupled Q-switched laser”, IEEE J. Quantum Electron. 25(2), 214-220, (1989).
J. J. Degnan, “Optimization of passively Q-switched laser”, IEEE J. Quantum Electron. 31(11), 1890-1901.
Birnbaum Milton
Spariosu Kalin
Alkov Leonard A.
Flores-Ruiz Delma R.
Gunther John E.
Harvey Min Sun
Raytheon Company
LandOfFree
Gain boost with synchronized multiple wavelength pumping in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gain boost with synchronized multiple wavelength pumping in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gain boost with synchronized multiple wavelength pumping in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3527669