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Pump wavelength dependence of the gain factor in 1.48 μm pumped Er 3 + ‐doped fiber amplifiers

Pump wavelength dependence of the gain factor in 1.48 μm pumped Er 3 + ‐doped fiber amplifiers Gain characteristics of Er 3+ ‐doped fibers for different pump wavelengths between 1.455 and 1.510 μm are investigated to obtain the optimum pump wavelength. It is found that the efficient pump wavelengths are located in the 1.460–1.475 μm range for Er 3+ ‐doped Al 2 O 3 ‐GeO 2 ‐SiO 2 and Er 3+ ‐doped GeO 2 ‐SiO 2 fibers, where a maximum gain of about 27 dB was obtained with an absorbed pump power of 31 mW. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Physics Letters American Institute of Physics
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