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1. C.-H. Yeh, C. C. Lee, and S. Chi, “120-nm bandwidth erbium-doped fiber amplifier in parallel configuration,” IEEE Photonics Technology Letters, vol. 16, no. 7, pp. 1637–1639, 2004. View at Publisher · View at Google Scholar
2. Y. B. Lu, P. L. Chu, A. Alphones, and P. Shum, “A 105-nm ultrawide-band gain-flattened amplifier combining C- and L-band dual-core EDFAs in a parallel configuration,” IEEE Photonics Technology Letters, vol. 16, no. 7, pp. 1640–1642, 2004. View at Publisher · View at Google Scholar
3. E. R. M. Taylor, L. N. Ng, J. Nilsson, et al., “Thulium-doped tellurite fiber amplifier,” IEEE Photonics Technology Letters, vol. 16, no. 3, pp. 777–779, 2004. View at Publisher · View at Google Scholar
4. R. M. Percival and J. R. Williams, “Highly efficient 1.064 $\mu$m upconversion pumped 1.47 $\mu$m thulium doped fluoride fibre amplifier,” Electronics Letters, vol. 30, no. 20, pp. 1684–1685, 1994. View at Publisher · View at Google Scholar
5. T. Kasamatsu, Y. Yano, and T. Ono, “1.49-$\mu$m-band gain-shifted thulium-doped fiber amplifier for WDM transmission systems,” Journal of Lightwave Technology, vol. 20, no. 10, pp. 1826–1838, 2002. View at Publisher · View at Google Scholar
6. Y. Ohishi, T. Kanamori, T. Nishi, S. Takahashi, and E. Snitzer, “Concentration effect on gain of ${\text{Pr}}^{3+}$-doped fluoridefiber for 1.3 $\mu$m amplification,” IEEE Photonics Technology Letters, vol. 4, no. 12, pp. 1338–1341, 1992. View at Publisher · View at Google Scholar
7. H. Jeong, K. Oh, S. R. Han, and T. F. Morse, “Characterization of broadband amplified spontaneous emission from an ${\text{Er}}^{3+}$-${\text{Tm}}^{3+}$ co-doped silica fiber,” Chemical Physics Letters, vol. 367, no. 3-4, pp. 507–511, 2003. View at Publisher · View at Google Scholar
8. D. C. Yeh, R. R. Petrin, W. A. Sibley, V. Madigou, J. L. Adam, and M. J. Suscavage, “Energy transfer between ${\text{Er}}^{3+}$ and ${\text{Tm}}^{3+}$ ions in a barium fluoride-thorium fluoride glass,” Physical Review B, vol. 39, no. 1, pp. 80–90, 1989. View at Publisher · View at Google Scholar
9. S. Tanabe, K. Suzuki, N. Soga, and T. Hanada, “Mechanisms and concentration dependence of ${\text{Tm}}^{3+}$ blue and ${\text{Er}}^{3+}$ green up-conversion in codoped glasses by red-laser pumping,” Journal of Luminescence, vol. 65, no. 5, pp. 247–255, 1995. View at Publisher · View at Google Scholar
10. X. Zou, A. Shikida, H. Yanagita, and H. Toratani, “Mechanisms of upconversion fluorescences in ${\text{Er}}^{3+}$, ${\text{Tm}}^{3+}$ codoped fluorozircoaluminate glasses,” Journal of Non-Crystalline Solids, vol. 181, no. 1-2, pp. 100–109, 1995.
11. W. Lozano B, C. B. de Araújo, and Y. Messaddeq, “Enhanced frequency upconversion in ${\text{Er}}^{3+}$ doped fluoroindate glass due to energy transfer from ${\text{Tm}}^{3+}$,” Journal of Non-Crystalline Solids, vol. 311, no. 3, pp. 318–322, 2002. View at Publisher · View at Google Scholar
12. E. Yahel and A. A. Hendy, “Modeling and optimization of short ${\text{Er}}^{3+}$-${\text{Yb}}^{3+}$ codoped fiber lasers,” IEEE Journal of Quantum Electronics, vol. 39, no. 11, pp. 1444–1451, 2003. View at Publisher · View at Google Scholar
13. L. Huang, A. Jha, S. Shen, and X. Liu, “Broadband emission in ${\text{Er}}^{3+}$-${\text{Tm}}^{3+}$ codoped tellurite fibre,” Optics Express, vol. 12, no. 11, pp. 2429–2434, 2004. View at Publisher · View at Google Scholar
14. T. J. Whitley and R. Wyatt, “Alternative Gaussian spot size polynomial for use with doped fiber amplifiers,” IEEE Photonics Technology Letters, vol. 5, no. 11, pp. 1325–1327, 1993. View at Publisher · View at Google Scholar
15. F. Di Pasquale and M. Federighi, “Improved gain characteristics in high-concentration ${\text{Er}}^{3+}$/${\text{Yb}}^{3+}$ codoped glass waveguide amplifiers,” IEEE Journal of Quantum Electronics, vol. 30, no. 9, pp. 2127–2131, 1994. View at Publisher · View at Google Scholar
16. M. Karásek, “Optimum design of ${\text{Er}}^{3+}$-${\text{Yb}}^{3+}$ codoped fibers for large-signal high-pump-power applications,” IEEE Journal of Quantum Electronics, vol. 33, no. 10, pp. 1699–1705, 1997. View at Publisher · View at Google Scholar
17. F. X. Gan, Optical and Spectroscopic Properties of Glass, Shanghai Science and Technology Press, Shanghai, China, 1992.
18. S. Shen, A. Jha, X. Liu, et al., “Tellurite glasses for broadband amplifiers and integrated optics,” Journal of the American Ceramic Society, vol. 85, no. 6, pp. 1391–1395, 2002.