[3] F. J. Mcaleavey, B. D. Macraith. Diode-pumped thulium-doped zirconium fluoride fiber as a fluorescent source for water sensing[J]. Electron. Lett., 1995, 31(16): 1379～1380

[4] D. C. Hanna, R. M. Percival, R. G. Smart et al.. Efficient and tunable operation of a Tm3+-doped fiber laser[J]. Opt. Commun., 1990, 75(3,4): 283～286

[5] K. Binnemans, R. V. Deun, C. Gorller-Walrand et al.. Spectroscopic properties of trivalent lanthanide ions in fluorophosphate glasses[J]. J. Non-Cryst. Solids, 1998, 238(1): 11～29

[6] Guoyin Zhang, Marcel J. Poulain. Influence of rare-earth ions on fluorogallate glass formation and properties[J]. J. Alloy. & Comp., 1998, 275～277: 15～20

[7] J. F. Philipps, T. Tpfer, H. Ebendorff-Heidepriem et al.. Spectroscopic and lasing properties of Er3+∶Yb3+-doped fluoride phosphate glasses[J]. Appl. Phys., 2001, B72(2): 399～405

[9] Xuelu Zou, Teturo Izumitani. Fluorescence mechanisms and dynamics of Tm3+ singly doped and Yb3+, Tm3+ double doped glasses[J]. J. Non-Cryst. Solids, 1993, 162(1): 58～67

[10] X. B. Chen, G. Y. Zhang, H. Y. Mao et al.. Research on the upconversion luminescence of Tm3+ ion in crystal and amorphous pentaphosphate material[J]. J. Lumin., 1996, 69(2): 151～160

[11] A. Brenier, C. Pedrine, B. Morine et al.. Fluorescence Mechanisms in Tm3+ singly doped and Tm3+, Ho3+ double doped indium-based fluoride glasses[J]. Phys. Rev. (B), 1990, 41(8): 5364～5371

[12] R. Lebullenger, L. A. Nunes, A. C. Hernandes. Properties of glasses from fluoride to phosphate composition[J]. J. Non-Cryst. Solids, 2001, 284(1): 55～60

[13] L. Koudelka, J. Klikorka, M. Frumar et al.. Raman spectra and structure of fluorophosphate glasses of (1-x)Ba(PO3)2-xLiRAlF6[J]. J. Non-Cryst. Solids, 1986, 85(2): 204～210

[14] Marcelo Nalin, Sidney Jose Lima Ribeiro, Yaunes Messaddeq et al.. Scandium fluorophosphates glasses: a structural approach[J]. C. R. Chimie, 2002, 5: 915～920

[15] J. Y. Ding, P. Y. Shih, S. W. Yung et al.. The properties and structure of Sn-Ca-P-O-F glasses[J]. Mater. Chem. & Phys., 2003, 82(1): 61～67

[16] Jean-Jacques Videau, Josik Portier, Bernardpiriou. Raman spectroscopic studies of fluorophosphate glasses[J]. J. Non-Cryst. Solids, 1982, 48(3): 385～392

[17] T. Kasamatsu, Y. Yano, T. Ono. Laser-diode pumping (1.4 and 1.56 μm) of gain-shifted thulium-doped fibre amplifier[J]. Electron. Lett., 2000, 36(19): 1607～1609

[18] S. Aozasa, T. Sakamoto, T. Kanamori et al.. Gain-shifted thulium-doped fiber amplifiers employing novel high concentration doping technique[J]. Electron. Lett., 2000, 26(5): 418～419

[19] B. R. Judd. Optical absorption intensities of rare-earth ions[J]. Phys. Rev., 1962, 127(3): 750～761

[20] G. S. Ofelt. Intensities of crystal spectra of rare-earth ions[J]. J. Chem. Phys., 1962, 37(3): 511～520

[21] Lilei Huang, Liangneng Wu, Yanbin Fu. Study on energy up-conversion in Yb, Ho∶YAG crystal[J]. Chin. Opt. Lett., 2003, 1(3): 180～182

[22] Debao Zhang, Baoyu Chen, Zhuping Liu et al.. Spectroscopic properties of Er3+-doped AlF3-La2O3-Al2O3-SiO2 glasses[J]. Chin. Opt. Lett., 2004, 2(4): 229～231

[23] Nissan Spector, R. Reisfeld, L. Boehm. Eigenstates and radiative transition probabilities for Tm3+ (4f12) in phosphate and tellurite glasses[J]. Chem. Phys. Lett., 1977, 49(1): 49～53

[24] G. A. Kumar, E. De La Rosa-Cruz, K. Ueda et al.. Enhancement of optical properties of Nd3+ doped fluorophosphates glasses by alkali and alkaline earth metal co-doping[J]. Opt. Mater., 2003, 22(3): 201～213