Ultrafast thulium fiber laser system emitting more than 1  kW of average power

Cavity-enhanced noncollinear high-harmonic generation

“…Numerical modeling shows that TMG can solve two main limitations of state-of-the art fs-EC-based XUV sources: First, the tradeoff between XUV generation efficiency and OC efficiency present with conventional hole OC can be circumvented thanks to an excellent OC efficiency irrespective of the target position, promising high-flux frequency combs in the XUV region for precision spectroscopy applications and, potentially, for future nuclear clocks [38]. Together with emerging 2-µm technologies [39,40], this method promises to boost the attainable photon energies of XUV combs to the water window and beyond. Secondly, it can be applied as an intracavity gating method to produce IAP at repetition rates in the tens of MHz.…”

The amazing progress of high-power ultrafast thin-disk lasers

“…The emergence of new laser technologies based on Yb: doped gain materials in geometries that are more advantageous for heat extraction (fibers, slabs, thin-disks) has made it possible to overcome this unwanted compromise, and ultrafast laser systems based on all these architectures have now long surpassed the kilowatt average power milestone as depicted in Fig. 1 [1][2][3][4][5]. This new performance regime has not only allowed to overcome the actual limitations in many existing fields, but also has opened the door to many new applications.…”

Watt-scale 50-MHz source of single-cycle waveform-stable pulses in the molecular fingerprint region

“…These results demonstrate the advantage of employing a 2-μm based pump source over 1 μm for IPDFG-based MIR generation, with higher efficiencies and broader phase matching. Even higher average powers and peak field strengths may be possible with further power scaling of the driver, leveraging advances in Tm:fibre CPA [28] or bulk-based nonlinear compression [29]. This may also offer the ability to use thinner generation media, boosting the bandwidth toward multi-octave terahertz spectra and even shorter sub-cycle transients [15] while retaining high output power.…”