Abstract
A highly efficient Er-doped fibre amplifier pumped by a visible laser diode is reported. Using a 670 nm AlGaInP laser diode as a pump light source and a high NA erbium-doped fibre, the EDFA realised a maximum signal gain of 33 dB at 1535 nm, with a saturated output power of 4 dBm. A maximum gain coefficient of 3.0 dB/mW was achieved for 670 nm laser diode pumping. >
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