19 February 2018 Efficient pump module coupling >1kW from a compact detachable fiber
Author Affiliations +
Proceedings Volume 10514, High-Power Diode Laser Technology XVI; 105140K (2018) https://doi.org/10.1117/12.2288468
Event: SPIE LASE, 2018, San Francisco, California, United States
In the most developed fiber amplifiers, optical pump power is introduced into the ~400μm-diameter, 0.46NA first cladding of the double-clad, Yb-doped, gain fiber, using a (6+1):1 multi-mode fiber combiner. For this configuration, the core diameter and numerical aperture of the pump delivery fibers have maximum values of ~225μm and ~0.22, respectively. This paper presents the first fiber-coupled laser-diode pump module emitting more than 1kW of claddingmode- stripped power from a detachable 225μm, 0.22NA delivery fiber at 976nm. The electrical-to-optical power conversion efficiency at 1kW is ~50%. The FWHM spectral width at 1kW output is ~4nm and has an excellent overlap with the narrow absorption spectrum of ytterbium in glass. Six of these pump modules attached to a (6+1):1 multimode combiner enable a 5-6kW, single-mode, Yb-doped fiber amplifier.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Dogan, M. Dogan, R. H. Chin, R. H. Chin, S. Fulghum, S. Fulghum, J. H. Jacob, J. H. Jacob, A. K. Chin, A. K. Chin, } "Efficient pump module coupling >1kW from a compact detachable fiber", Proc. SPIE 10514, High-Power Diode Laser Technology XVI, 105140K (19 February 2018); doi: 10.1117/12.2288468; https://doi.org/10.1117/12.2288468


Back to Top