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Highly efficient 978 nm dipole-pumped erbium-doped fibre amplifier with 24 dB gain

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9 Author(s)

Reports an Er3+-doped fibre amplifier pumped with a strained GaInAs/AlGaAs quantum-well dipole laser operating at 978 nm. Efficient optical coupling of the diode laser pump was achieved with a wedge-tipped fibre. An optical gain of 24 dB at 1535 nm was obtained with only 6.2 mW of pump power, corresponding to a gain of 3.9 dB/mW of pump power. This is the highest efficiency for a fibre amplifier achieved this far.

Published in:

Electronics Letters  (Volume:25 ,  Issue: 20 )