We report on an agile nonlinear device able to generate 300W, mJ-level, transform-limited pulses from few picoseconds down to few tens of femtoseconds. The system is based on an industrial-grade 330W laser, delivering 400fs pulses followed by an efficient, >90% throughput, gas-filled multipass cell where self-phase modulation occurs. Adjustment of the chamber gas pressure and incoming pulse chirped either favors spectral compression or nonlinear compression, leading to the generation 300W, 1mJ, high beam quality and nearly transform-limited pulses of 2ps down to 30fs within a single system. This source is a versatile tool for both industrial and scientific applications.

We present a new method for multiplexing single laser cavities to support a pair of noise-correlated, yet cavity length independent modes. These modes share all intracavity components and take a near-common path, but do not overlap on any active elements. With a SESAM we passively modelocked both independent modes and obtain dual optical frequency comb operation. The demonstrated 80-MHz laser delivers more than 2.1 Watts of average power per comb with shorter than 140 fs pulse centered at 1051 nm. The relative timing jitter between these two pulse trains is 1.8 fs (integration bandwidth from 100 Hz – 100 kHz).

The thin-disk multipass amplifier provides pulse energy and power scaling up to more than 100 mJ of pulse energy and average power in the kW regime with a system amplification factor in the range of 100. The flexibility of the seed laser, such as choice of repetition rate, pulse duration, bursts or pulse on demand is maintained. Due to its mechanical and thermal stability, different applications like glass cutting or high harmonic generation for EUV or X-ray radiation can be addressed even in a harsh industrial environment.

We present an ultrafast high-power coherently combined thulium-based fiber-CPA. The laser system aims to deliver 400 µJ pulse energy at a pulse repetition frequency of 500 kHz. The simultaneous availability of 200 W-class average power and 1 GW-class peak power in the 2 µm wavelength regime will not only be unique in the world of science but also will pave the way to more compact, cost-effective lasers which are ideally suited for high-harmonic generation into the water-window and nonlinear-frequency conversion to the mid-IR and THz spectral range.

We report a compact ultrafast solid-state laser source with a pulse repetition rate tunable in the range of 0.5 – 1.3 GHz. The optical cavity design allows a user to vary the repetition rate only by moving the mirrors. The Yb:KYW crystal-based laser emits 250 fs pulses at a central wavelength of 1040nm and the SESAM modelocking enables self-starting. An average power up to 150 mW is achieved using a stabilized single mode pump source at 981 nm, emitting up to 800 mW. In continuous wave mode, up to 270 mW were measured with an optical-to-optical efficiency of 33%.

We present a gigahertz dual-comb source generated in a single laser cavity. The novel multiplexing method we use supports two spatially distinct modes with the same polarization, enabling optimal laser performance in a low-loss cavity configuration. The two independent pulse trains from the SESAM-modelocked Yb:CALGO laser operate simultaneously around 1057 nm with a repetition rate of 1.06 GHz. Comb-1 has 65-mW average power with 87.4-fs pulses, and comb-2 has 81-mW average power with 85.8-fs pulses. The repetition rate difference is set to 30.67 kHz and is tunable from -75 kHz to +75 kHz. Each comb exhibits robust self-starting operation.

We will present in this paper the latest development made in the frame of High repetition rate PW laser. Increasing the repetition rate in high energy laser requires to master a lot of different parameters and especially the cooling and the reliability. We have worked in this direction in the frame of two projects: ELI ALPS in hungaria and HIBEF in Germany. We will show in the talk the developments that we have accomplished to reach at the same time a high energy and a high average power: specific pump laser (50J at 10Hz), High average power cryo cooling. We will also focus on the reliability of these systems and present the results gathered during the last months.

Amplitude Technologies is manufacturing TiSa and Nd:YAG pump laser since 20 years. We have seen during this period a large increase on the peak power delivered by these systems going from 100TW level up to more than 2PW. Since few years we are now facing a strong interest for the increase of the repetition rate leading to higher average power. We are currently finalizing the manufacturing of a 2PW TiSa system working at 10Hz whereas the previous generation was not going above 1Hz. To accomplish this work we have developed a Nd:YAG flashlamp pumped pump laser working at 10Hz and delivering 50J @ 532nm. We recently reached an important milstones by demonstrating amplification of TiSa above 220W.

Many scientific and industrial applications can potentially benefit from high repetition rate, ultrafast short-wave infrared (SWIR) lasers operating at high average power. Modelocked thin-disk lasers are particularly promising in this aspect, as they can outperform amplifier schemes from a simple multi-MHz oscillator. In our work, we demonstrate latest advances in high-power 2µm TDLs, and present a continuous-wave Ho:YAG thin-disk oscillator with a record output power of 112 W, as well as SESAM modelocking of this source with up to 40.5 W of average power.

This work deals with the compensation of frequency modulation to amplitude modulation (FM-to-AM) conversion due to gain spectral response of a regenerative amplifier. To do so, five designs of interference filters were tested. Direct measurements of FM-to-AM conversion were performed from temporal pulses as a function of wavelength using a 60 GHz bandwidth photodiode and oscilloscope. Additional numerical studies allowed us to find the best trade-off between low optical losses and compensation efficiency over a wide spectral range. With the best interference filter design, low amplitude modulation rate was over 2.0 nm spectral range whereas it was 0.4 nm without.

Thin-disk lasers are present in science and industry since the early 90s, yet not so many companies offer them commercially. This was a strong motivation for HiLASE to develop a versatile thin-disk laser platform that would be easily customized to user’s needs and provide a wide range of laser parameters, like output power up to 100 W, pulse energy up to 20 mJ, repetition rate 1-200 kHz, 1 ps pulse duration and wavelength range from Mid-IR to UV. During this presentation, we would like to introduce several customized systems used in different applications and their successful integration into industrial processes.

Laser cooling contributes a lot to the reliability of USP industrial lasers. Femtosecond laser equipped with the innovative Direct Refrigerant Cooling (DRC) is highly reliable, maintenance free, has better cooling efficiency compared to water cooled systems and produces almost no excessive heat. Moreover, it is absolutely risk free from damaging any laser equipment, because it is water-less and entire cooling system is permanently hermetically sealed. Also, it is very compact and light weight and requires no any heavy and bulky additional equipment. Excessive heat from the laser head is transferred through the fully detachable cooling plate via flexible armored hoses.