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15-W fiber-coupled quantum-dot pump module

: Gilfert, C.; Pavelescu, E.-M.; Reithmaier, J.P.; Westphalen, T.; Traub, M.; Michel, N.; Krakowski, M.


IEEE Photonics Technology Letters 24 (2012), No.12, pp.1030-1032
ISSN: 1041-1135
Journal Article
Fraunhofer ILT ()

We have developed 920-nm pump modules for Yb-doped fiber amplifiers. The pump laser utilizes a single layer of In(AlGa)As/GaAs quantum-dot material as active region. Stable operation without thermoelectric cooling, output powers of up to 40 W, and wall-plug efficiencies of more than 50% have been achieved on processed broad-area laser bars. The packaged module reaches 15 W when coupled to a 200-m fiber.