Gain-shifted thulium-doped fibre amplifiers employing novel highconcentration doping technique |
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Authors: | Aozasa S Sakamoto T Kanamori T Hoshino K Shimizu M |
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Affiliation: | NTT Photonics Lab., Ibaraki; |
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Abstract: | A novel high thulium concentration doping technique is proposed for shifting the gain band in thulium-doped fibre amplifiers (TDFAs). The gain peak shifts from 1473 to 1505 nm when the Tm3+ concentration is increased from 2000 to 8000 ppm. The authors have achieved gains of >18 dB and a noise figure (NF) of <7 dB from 1480 to 1510 nm (30 nm bandwidth) for a total pump power of 500 mW |
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