Coherent light generators – Short wavelength laser
Patent
1997-04-08
1998-08-18
Scott, Jr., Leon
Coherent light generators
Short wavelength laser
H01S 330
Patent
active
057967628
ABSTRACT:
The present invention is directed to a tunable, solid state laser utilizing room temperature, stable, color centers of LiF:F.sub.2.sup.+ ** material. Also disclosed is a method of lasing. An object of the present invention is to develop and optimize LiF:F.sub.2.sup.+ thermostabilized active media, to propose a method of pumping, and to realize a room temperature, stable and efficient operation of the color center laser. These and other objects are achieved by introducing special dopants in the crystal at the stage of crystal growing; applying special regimes of ionizing treatment of the crystal, resulting in thermostabilization of the F.sub.2.sup.+ centers in LiF crystals; and utilizing alexandrite laser radiation for color center crystal pumping with a pump radiation frequency which is appropriate for the selective excitation of the F.sub.2.sup.+ color centers. The invention can be used in cases when monochromatic laser emission tunable in the visible-infrared spectral region is required for solving problems in various fields of science and technology such as laser spectroscopy, photochemistry, photobiology, medicine, and the like.
REFERENCES:
patent: 4644550 (1987-02-01), Csery et al.
patent: 4672619 (1987-06-01), Luty et al.
patent: 4881234 (1989-11-01), Foster et al.
patent: 4990322 (1991-02-01), Pollock et al.
patent: 5267254 (1993-11-01), Schneider et al.
patent: 5471493 (1995-11-01), Mirov
M.A. Aegerter and F. Luty, The F.sup.+.sub.2 Center in KC1 Crystals. Part II: Optical Properties and Analogy with the H.sup.+.sub.2 Molecule, Phys. Stat. Sol. (b), 43, 245-261 (1971).
M.A. Aegerter and F. Luty, The F.sup.+.sub.2 Center in KCl Crystals. Part I:Formation and Bleaching Kinetics, Phys. Stat. Sol.(b), 43, 227-243 (1971).
I.A. Parfianovich, V.M. Hulugurov, B.D. Lobanov, and N.T. Maximova, Luminescence and stimulated emission of color centers in LiF, Bull. Acad. Sci. USSR, Phys. Ser., 43, 20-27 (1979).
J. Nahum, Optical Properties and Mechanism of Formation of Some F-Aggregate Centers in LiF, Phys. Rev., 158, 814-825 (1967).
L. Bossi, C. Bussolati and G. Spinolo, Lifetime of the first excited state of the F.sup.+.sub.2 center in LiF, Phys. Lett., 32A, 159-160 (1970).
W. Gellermann, K.P. Koch and F. Luty, Recent progress in color center lasers, Laser Focus, 71-75 (Apr. 1982).
L.F. Mollenauer, Dyelike lasers for the 0.9-2-.mu.m region using F.sup.+.sub.2 centers in alkali halides, Opt. Lett., 1, 164-165 (1977).
L.F. Mollenauer, D.M. Bloom and A.M. DelGaudio, Broadly tunable cw lasers using F.sup.+.sub.2 centers for the 1.26-1.48 and 0.82-1.07 .mu.m bands, Opt. Lett., 3, 48-50 (1978).
L.F. Mollenauer, Progress in color center lasers, J. Opt. Soc. Amer., 70, 634-645 (1980).
Yu.L. Gusev, S.I. Marennikov and V.P. Chebotaev, Lasing effect in the spectrum region of 0.88-1.2 .mu.m using F.sup.+.sub.2 and F.sup.-.sub.2 color centers in LiF, Sov. Tech. Phys. Lett., 3, 124 (1977).
I.A. Parfianovich, F.M. Hulugurov, N.A. Ivanov, A.A. Mikhailenko, V.A. Chepurnoi and A.P. Shkadarevich, Doped LiF crystals -new active media for tunable lasers, in Proc. 4 All-Union Conf. Tunable Lasers, Novosibirsk, USSR, Dec. 1983, pp. 98-103, V.P. Chebotaev Ed.
V.M. Hulugurov and B.D. Lobanov, Laser action in the spectral region of 0.84-1.13 .mu.m in the color center LiF-OH crystal at 300.degree. K., Sov. Tech. Phys. Lett., 4, 595-596 (1978).
T.T. Basiev, S.B. Mirov and A.M. Prokhorov, Periodic pulsed tunable laser using an LiF crystal with F.sup.+.sub.2 -centers excited by second-harmonic radiation from an Nd.sup.3+ -garnet laser, Sov. J. Dokl. Acad. Nauk SSSR, 246, 72-74 (1979).
T.T. Basiev, Yu.K. Voron'ko, S.B. Mirov, V.V. Osiko, A.M. Prokhorov, Kinetics of accumulation and excitation of F.sup.+.sub.2 color centers in LiF crystals, Sov. JETP Lett., 30, 626-629 (1979).
T.T. Basiev, S.B. Mirov, Room Temperature Tunable Color Center Lasers, Laser Science and Technology books series. An International Handbook, vol. 16 pp. 1-160. Gordon and Breach Science Publishers/Harwood Academic Publishers (1994).
L.F. Mollenauer and J.C. White (Eds.), Tunable Lasers, pp. 1-277. New York: Springer Verlag (1987).
D. Wandt, W. Gellerman, F. Luty and H. Welling, Tunable cw laser operation in the 1.45-2.16 .mu.m range based on F.sup.+.sub.2 -like centers in O.sup.-.sub.2 doped NaCl, KCl, and KBr crystals, J. Appl. Phys., 61, 864 (1987).
T.T. Basiev, S.B. Mirov and V.V. Osiko, Room-Temperature Color Center Lasers, IEEE J. of QE 24, 1052 (1988).
A.A. Alybakov, Yu.L. Gusev, O.V. Drozdova, A.V. Kirpihnikov, S.S. Kolyago and B.S. Umurzakov, The properties of active media based on (F.sup.+.sub.2) and F.sup.-.sub.3 color centers in NaF crystals, in Proc. 4 All-Union Conf. Tunable Lasers, Novosibirsk, USSR, Dec. 1983, pp. 124-129, V.P. Chebotaev, Ed. Place: Inst. Thermo-Phys. USSR Acad. Sci. (1984).
T.T. Basiev, V.A. Konyushkin, S.B. Mirov, V.V. Ter-Mikirtychev, Efficient Tunable Lasers Utilizing F.sub.2 and F.sup.+.sub.2 Color Centers in LiF(F.sub.2) Crystals, Sov. J. Quant. Electron., 19, 145 (1992).
Ch.B. Lushchik, I.K. Vitol and M.A. Elango, Decay of electronic excitations into radiation defects in ionic crystals, Uspehi Fizicheskih Nauk, 122, 223-252 (1977); Sov. Achievements Physi. Sci. (1977).
C.J. Delbecq, A Study of M Center Formation in Additively Colored KCl, Z. Phys., vol. 171, N3, pp. 60-581 (1963).
Dergachey Alex
Mirov Sergey
Jr. Leon Scott
The UAB Research Foundation
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