Abstract

A dual pumped L-band erbium-doped fiber amplifier (DPLB-EDFA) is investigated by solving the optical propagation equation that takes into account radial effects of the fiber and the rate equation in a steady-state two-level model with a weakly guided approximation. Applying an inversing method and a genetic algorithm, the DPLB-EDFA is optimized for dual pumped wavelengths and directions, fiber lengths, as well as radial distributions of the erbium concentration and core refractive index. There is evidence to show that the optimal pumping wavelengths of the DPLB-EDFA are different in two different pumping schemes. The optimized DPLB-EDFA is characterized by a gain peak wavelength of 1600 nm, a gain peak of ~34 dB, a bandwidth of 30–37 nm, and a noise figure of 3.5–3.7 dB. Such characteristics are superior as compared with those using conventional 1480-nm pumps with step indexes and radial-uniform erbium concentrations.

© 2006 IEEE

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Electron Lett. (2)

L. N. Ng, E. R. Taylor, J. Nilsson, "795 nm and 1064 nm dual pump thulium-doped tellurite fiber for S-band amplification," Electron Lett. 38, 1246-1247 (2002).

A. S. L. Gomes, M. T. Carvalho, M. L. Sundheimer, "Comparison of distributed gain in two dual-wavelength pumping schemes for thulium-doped fiber amplifiers," Electron Lett. 39, 647-648 (2003).

IEEE J. Quantum Electron. (1)

B. H. Choi, H. H. Park, M. J. Chu, "New pump wavelength of 1540-nm band for long-wavelength- band erbium-doped fiber amplifier (L-band EDFA)," IEEE J. Quantum Electron. 39, 1272-1280 (2003).

IEEE Photon. Technol. Lett. (2)

E. R. M. Taylor, L. N. Ng, L. Nilsson, "Thulium-doped tellurite fiber amplifier," IEEE Photon. Technol. Lett. 16, 777-779 (2004).

Y. B. Lu, P. L. Chu, A. Alphones, P. Shum, "A 105-nm ultrawide-band gain-flattened amplifier combining C- and L-band dual-core EDFAs in a parallel configuration," IEEE Photon. Technol. Lett. 16, 1640-1642 (2004).

J. Lightw. Technol. (2)

W. J. Miniscalco, "Erbium-doped glasses for fiber amplifiers at 1500 nm," J. Lightw. Technol. 9, 234-250 (1991).

C. R. Giles, E. Desurvire, "Modeling erbium-doped fiber amplifiers," J. Lightw. Technol. 9, 271-283 (1991).

J. Opt. Soc. Amer. B, Opt. Phys. (1)

T. Ohtsuki, S. Honkanen, S. L. Najafi, "Cooperative up-conversion effects on the performance of $\hbox{Er}^{3+}$-doped phosphate glass waveguide amplifiers," J. Opt. Soc. Amer. B, Opt. Phys. 14, 1838-1845 (1997).

Opt. Commun. (1)

C. Cheng, Z. J. Xu, C. H. Sui, "A novel design method: A genetic algorithm applied to an erbium-doped fiber amplifier," Opt. Commun. 227, 371-382 (2003).

Opt. Laser Technol. (1)

C. Cheng, "A global design of an erbium-doped fiber and an erbium-doped fiber amplifier," Opt. Laser Technol. 36, 607-612 (2004).

Opt. Lett. (1)

Other (1)

Y. Q. Li, M. Cui, The Theories and Technologies of Optical Waveguides (The People Post Office Press, 2001) pp. 150-151.

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