This work presents a review on the effect of transverse mode instability in high-power fiber
laser systems and the corresponding investigations led worldwide over the past decade …

Over the past two decades, fiber laser technologies have matured to such an extent that they
have captured a large portion of the commercial laser marketplace. Yet, there still is a …

The threshold-like onset of mode instabilities is currently the main limitation for the scaling of
the average output power of fiber laser systems with diffraction limited beam quality. In this …

The fiber laser, with its humble beginning in the late 1980s, has undergone tremendous
development in the past decade or so, transforming itself from a research curiosity to a major …

Photodarkening in Yb doped fibers was examined at 633 nm in-situ during cladding
pumping at 915 nm with varying pump powers and with no indication of an onset threshold …

We demonstrate a high power fiber (85μm core) amplifier delivering up to 292Watts of
average output power using a mode-locked 30ps source at 1032nm. Utilizing a single mode …

Using a combination of pulse electron paramagnetic resonance and photoluminescence
spectroscopy, we demonstrate the major role of phosphorous rather than aluminium in the …

Using a combination of experimental techniques such as optical absorption, Raman
scattering, continuous wave and pulse Electron Spin Resonance (ESR), we characterize a …

Yb3+/Al3+/P5+-co-doped silica glasses with different P/Al ratios were prepared using the sol–
gel method combined with high-temperature sintering. The evolution of composition …

We report experimental results showing novel features in photo‐darkening and photo‐
bleaching of a heavily‐doped Ytterbium silica fiber exposed to in‐core 977‐nm and 543‐nm …