Development of high average power sub-picosecond diode-pumped lasers


We focus on the research and development of picosecond and femtosecond laser systems reaching average powers up to 1 kW, and design of associated components essential for such development. Currently, we operate one of the most powerful thin-disk laser platforms called "PERLA" operating at the wavelength of 1030 nm, however, nonlinear frequency conversion broadens the applicable spectral range from UV (200 nm) to mid-infrared (> µm) making it a versatile tool for applications.

Picosecond and femtosecond light pulses are a useful tool for many hi-tech industrial, scientific, or biomedical laser applications. For example, such lasers can drill precise hair-size holes, help in the manufacturing of fast computer chips and large displays, create antibacterial surfaces, and be vital for other emerging fields. Our group focuses on the development of these laser sources since 2012. We have designed and prototyped the thin-disk laser platform PERLA C, by employing the high average power regenerative amplifier concept. Using Yb:YAG gain medium, the average output power is scalable from a few watts up to 1 kW, and pulse energy can reach > 100 mJ at the wavelength of 1.03 µm. The typical pulse duration of PERLA lasers is < 2 ps, however, femtosecond lasers are currently intensively studied as well. Recently, we have launched R&D programme on a thin-disk laser system based on Ho-doped disks, generating 2.1 µm beams.

Besides the PERLA platform, we have developed and operate frequency conversion setups for the generation of 2nd, 3rd, 4th, and 5th harmonic frequencies. Conversion to longer wavelength is realized by optical parametric generation (OPG) followed by optical parametric amplification (OPA). Such a complex laser system covering a spectral range from 206 nm up to 3 µm now serves as an excellent tool for industrial material processing, in compliance with the Industry 4.0 future standards. 

Thin-disk laser development laboratory PERLA.
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