Abstract

A detailed analysis is presented of the possibility of an ${\mathrm{Er}}^{3+}$ and ${\mathrm{Pr}}^{3+}$ codoped fiber as an amplifier for 1.3 and $1.5\mu \mathrm{m}$ transmission windows. The numerical models with $1010∕1480\mathrm{nm}$ and $986∕1480\mathrm{nm}$ pump lasers are proposed, the rate and power propagation equations are solved numerically, and the dependence of the gains at 1310, 1530, and $1600\mathrm{nm}$ windows on pump wavelength and power, active ion concentrations, and signal wavelength are calculated. The results show that with $1010∕1480\mathrm{nm}$ pumps of $200∕100\mathrm{mW}$ and with fixed ${\mathrm{Pr}}^{3+}$ and ${\mathrm{Er}}^{3+}$ concentrations at $8.0\times {10}^{24}$ and $2.0\times {10}^{24}\text{\hspace{0.17em} ions}∕{\mathrm{m}}^3$, the signals at 1310 and $1530\mathrm{nm}$ windows may be equally amplified with a gain of $26.0\mathrm{dB}$ in the active fiber with a length of $7.0\mathrm{m}$, and with a $1480∕986\mathrm{nm}$ pump power of $100∕300\mathrm{mW}$ and ${\mathrm{Pr}}^{3+}$ and ${\mathrm{Er}}^{3+}$ ion concentrations of $2.0\times {10}^{24}$ and $2.0\times {10}^{24}\text{\hspace{0.17em} ions}∕{\mathrm{m}}^3$, the signals at 1310 and $1530\mathrm{nm}$ may be nearly equally amplified with a gain of $8.0\mathrm{dB}$ in a $10.0\mathrm{m}$ long active fiber.

© 2009 Optical Society of America

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