72 citations · 130 across the 4 of their papers we have counts for
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Monolithic Thulium Fiber Laser with 567 W output power at 1970 nm
Till Walbaum, Matthias Heinzig, Thomas Schreiber +2
We report on a monolithic thulium fiber laser with 567 W output power at 1970 nm, which is the highest power reported so far directly from a thulium oscillator. This is achieved by…
Measuring Thermal Load in Fiber Amplifiers in the Presence of Transversal Mode Instabilities
Franz Beier, Marco Plötner, Bettina Sattler +7
We report on detailed in-situ distributed temperature measurements inside a high power fiber amplifier. The deducted thermal load and the TMI-threshold of a commercial LMA fiber wi…
Experimental realization of transverse mode conversion using optically induced transient long-period gratings
Tim Hellwig, Martin Schnack, Till Walbaum +2
We present the experimental realization of transverse mode conversion in an optical fiber via an optically induced long-period grating. The transient gratings are generated by femt…
Optically induced mode conversion in graded-index fibers using ultra-short laser pulses
Tim Hellwig, Till Walbaum, Carsten Fallnich
We propose the use of graded-index few-mode fibers for mode-conversion by long-period gratings (LPG) transiently written by ultrashort laser pulses using the optical Kerr effect. T…