T. Kokki

Experimental verification of spatial distribution of photodarkening in large mode area ytterbium doped fibers

J. Koponen, M. Laurila, M. Hotoleanu, 2008, 2008 Conference on Lasers and Electro-Optics and 2008 Conference on Quantum Electronics and Laser Science.

On the measurement of fundamental mode bend loss in large-mode-area optical fibers.

V. Aallos, J. Koponen, O. Kimmelma, 2017, Applied optics.

Fiber amplifier utilizing an Yb-doped large-mode-area fiber with confined doping and tailored refractive index profile

Marko Laurila, Joona Koponen, Changgeng Ye, 2010, LASE.

Measuring bend losses in large-mode-area fibers

Joona Koponen, Changgeng Ye, Ville Aallos, 2015, Photonics West - Lasers and Applications in Science and Engineering.

Confined-doped ytterbium fibers for beam quality improvement: fabrication and performance

Joona Koponen, Seppo Honkanen, Ari Tervonen, 2012, Other Conferences.

Near-diffraction-limited output from confined-doped ytterbium fibre with 41 μm core diameter

S. Honkanen, A. Tervonen, J. Koponen, 2011 .