Beach, 1993, Opt. Lett., 18, 1326, 10.1364/OL.18.001326
Fan, 1988, IEEE J. Quantum Electron., 24, 2345, 10.1109/3.14358
Cruz, 1990, Opt. Lett., 15, 282, 10.1364/OL.15.000282
Kushida, 1982, Solid State Commun., 44, 1363, 10.1016/0038-1098(82)90894-8
Zverev, 1971, Sov. Phys. JETP, 33, 497
Hovis, 1992, IEEE J. Quantum Electron., 28, 39, 10.1109/3.119492
Zlenko, 1973, Sov. J. Quantum Electron., 2, 474, 10.1070/QE1973v002n05ABEH004496
Grigor'yants, 1983, Sov. J. Quantum Electron., 12, 1010, 10.1070/QE1982v012n08ABEH005765
Perlin, 1963, Sov. Phys., 6, 542, 10.1070/PU1964v006n04ABEH003587
Huang, 1950, Proc. R. Soc. of London Ser. A, 204, 406, 10.1098/rspa.1950.0184
Partlow, 1967, Phys. Rev., 157, 252, 10.1103/PhysRev.157.252
Miyakawa, 1970, Phys. Rev. B, 1, 2961, 10.1103/PhysRevB.1.2961
Fischer, 1970, J. Chem. Phys., 53, 3195, 10.1063/1.1674470
Soules, 1971, Phys. Rev. B, 3, 262, 10.1103/PhysRevB.3.262
Fong, 1972, J. Chem. Phys., 56, 4020, 10.1063/1.1677810
Struck, 1975, J. Lumin., 10, 1, 10.1016/0022-2313(75)90029-0
Riseberg, 1968, Phys. Rev., 174, 429, 10.1103/PhysRev.174.429
Layne, 1977, Phys. Rev. B, 16, 10, 10.1103/PhysRevB.16.10
Perlin, 1982, Sov. Phys. Solid State, 24, 386
Huang, 1982, Commun. Theor. Phys., 1, 535, 10.1088/0253-6102/1/5/535
Gapontsev, 1984, J. Lumin., 31 & 32, 201, 10.1016/0022-2313(84)90247-3
Judd, 1962, Phys. Rev., 127, 750, 10.1103/PhysRev.127.750
Ofelt, 1962, J. Chem. Phys., 37, 511, 10.1063/1.1701366
Thomas, 1992, J. Non-Cryst. Solids, 151, 183, 10.1016/0022-3093(92)90028-I
Maksimova, 1974, Proc. P. N. Lebedev Phys. Inst., 60, 59
Gruber, 1988, Phys. Rev. B, 37, 8564, 10.1103/PhysRevB.37.8564
Kariss, 1965, Opt. Spectrosc., 18, 247
Levitt, 1970, Mem. Soc. R. Sci. Liege, 5, 121
Heiman, 1979, J. Non-Cryst. Solids, 34, 63, 10.1016/0022-3093(79)90007-3
Weber, 1973, Phys. Rev. B, 8, 54, 10.1103/PhysRevB.8.54
Zhang, 1984, Chin. Phys., 4, 530
Hurrell, 1968, Phys. Rev., 173, 851, 10.1103/PhysRev.173.851
Richman, 1964, Phys. Rev., 133, A1364, 10.1103/PhysRev.133.A1364
Miller, 1970, J. Chem. Phys., 52, 4172, 10.1063/1.1673628
Sveshnikova, 1987, Opt. Spectrosc., 63, 618
Reed, 1973, Phys. Rev. B, 8, 980, 10.1103/PhysRevB.8.980
Tkachuk, 1985, Opt. Spectrosc., 58, 216
Yarema, 1982, IEEE J. Quantum Electron., QE18, 1941, 10.1109/JQE.1982.1071463
Martin, 1978, Appl. Phys. Lett., 32, 816, 10.1063/1.89927
Krupke, 1974, IEEE J. Quantum Electron., QE10, 450, 10.1109/JQE.1974.1068162
