Farries, M.C., Laming, R.I., Morkel, P.R., Birks, T.A., Payne, D.N. and Tarbox, E.J.
Efficient high-gain erbium-doped fibre amplifier pumped with a frequency-doubled Nd:YAG laser
At OFC'89: Optical Fiber Communication Conference, United States.
01 Feb 1989.
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An optical amplifier consisting of an erbium-doped germanosilicate fibre optically pumped at 532nm is described. Negligible excited-state absorption at 532nm allows efficient pumping, enabling a gain of 34dB at 1536nm to be obtained for only 25mW of pump power. Since the early demonstrations of optical amplification in rare-earth-doped fibres, erbium-doped fibres have generated much interest as optical amplifiers in the third telecommunications window around 1.55µm.
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