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We report a novel breakup scenario of ultra-short high-order solitons in optical waveguides, via formation of a shock far below subcycle level, followed by a dramatic and complete transition into a dispersive wave.
We report on a variety of continuous wave and pulsed laser sources based on Thulium- and Holmium-doped materials, emitting in the spectral range around 2 μm. This includes continuous wave Thulium-doped fiber lasers which have been realized based on the beam combining technique by using tapered fused bundles and truly single mode WDM cascades, respectively. A pulsed laser source emitting nano- or picosecond...
Reliable, rugged and optically efficient fiber combiners are required for monolithic single frequency amplifier systems [1]. The most common fiber combiner type, a tapered fused fiber bundle (TFB), combines highly efficiently pump light up to several hundred watts, but with the drawback of an interrupted signal core, since this approach is based on the fiber end face pumping scheme [2]. Hence, the...
In this paper, we present Yb:KLuW thin disk regenerative amplifier. Due to the relatively low astigmatic convex curvature of 7 m by 22 m of the thin disk we have been able to realize three foldings without mode compensating effort. A maximum pulse energy of 102 muJ after compression was extracted. At a repetition rate of 20 kHz we achieved a pulse duration of 255 fs what is about 7% over the Fourier...
This paper reports on a passively mode-locked ytterbium-doped fiber laser with a repetition rate as low as 1.8 MHz. The oscillator with a resonator length of 118 m is hybridly mode-locked via nonlinear polarization evolution and saturable absorption in a semiconductor generating chirped 3.8 ps long pulses with a pulse energy of 1.0 nJ. These pulses are dechirped externally to pulse duration of 93...
An Yb:KYW femtosecond regenerative amplifier with combination of two partially overlapping gain spectra from a single thin disk, producing 500 muJ sub 200 fs pulses at a repetition rate of 20 kHz, is presented.
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