Highly efficient 978 nm diode-pumped erbium-doped fibre amplifier with 24 dB gain
- 28 September 1989
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 25 (20) , 1386-1388
- https://doi.org/10.1049/el:19890928
Abstract
We report an Er3+-doped fibre amplifier pumped with a strained GaInAs/AlGaAs quantum-well diode 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 thus far.Keywords
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