Monolithic multi-pass thin-disk laser amplifier providing near fundamental mode 2.3 mJ pulse energy at 1.4 kW average output power and 950 fs pulse duration

Dietz, Thomas; Bauer, Dominik; Scharun, Michael; Höck, Helge; Sutter, Dirk; Killi, Alexander; Leitenstorfer, Alfred

doi:10.1364/assl.2018.am2a.4

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…In particular, large mode areas allow for high pulse energies at reasonable fluences while the short propagation distance through the gain medium keeps the nonlinearities low. With the advent of "cold" material processing and micromachining, the demand for powerful and highly energetic ultrashort pulsed lasers has pushed their development in the industrial domain, leading to commercial micromachining lasers with pulse energies up to several millijoules at repetition rates of hundreds of kHz, with pulse durations well below 1 ps [44,45]. Driven by the need for powerful pump lasers for optical parametric chirped pulse amplifiers (OPCPA), scientists applied the industrial thin-disk laser components to build ultrafast lasers aiming at tens of millijoules of pulse energy at repetition rates between 5-10 kHz [46].…”

Section: High Peak-and Average-power Laser Sourcementioning

confidence: 99%

The laser lightning rod project

Produit

Walch

Herkommer

et al. 2021

Eur. Phys. J. Appl. Phys.

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Lightning is highly destructive due to its high power density and unpredictable character. Directing lightning away would allow to protect sensitive sites from its direct and indirect impacts (electromagnetic perturbations). Up to now, lasers have been unable to guide lightning efficiently since they were not offering simultaneously terawatt peak powers and kHz repetition rates. In the framework of the Laser Lightning Rod project, we develop a laser system for lightning control, with J-range pulses of 1 ps duration at 1 kHz. The project aims at investigate its propagation in the multiple filamentation regime and its ability to control high-voltage discharges. In particular, a field campaign at the Säntis mountain will assess the laser ability to trigger upward lightning.

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Section: High Peak-and Average-power Laser Sourcementioning

confidence: 99%

The laser lightning rod project

Produit

Walch

Herkommer

et al. 2021

Eur. Phys. J. Appl. Phys.

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“…So far, the highpower single-frequency CW lasers have been developed with the fibers, slabs, thin disks and cubic crystals and so on. The disk lasers [5,6] benefit from the relatively large cooling surface, small heat dissipation volume of the gain medium, and have better heat dissipation characteristics. They are widely used in the preparation of high-power continuous laser and high-energy pulsed laser.…”

Section: Introductionmentioning

confidence: 99%

A Review of the High-Power All-Solid-State Single-Frequency Continuous-Wave Laser

Peng

Jin

et al. 2021

Micromachines

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High-power all-solid-state single-frequency continuous-wave (CW) lasers have been applied in basic research such as atomic physics, precision measurement, radar and laser guidance, as well as defense and military fields owing to their intrinsic advantages of high beam quality, low noise, narrow linewidth, and high coherence. With the rapid developments of sciences and technologies, the traditional single-frequency lasers cannot meet the development needs of emerging science and technology such as quantum technology, quantum measurement and quantum optics. After long-term efforts and technical research, a novel theory and technology was proposed and developed for improving the whole performance of high-power all-solid-state single-frequency CW lasers, which was implemented by actively introducing a nonlinear optical loss and controlling the stimulated emission rate (SER) in the laser resonator. As a result, the output power, power and frequency stabilities, tuning range and intensity noise of the single-frequency lasers were effectively enhanced.

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“…Thin-disk amplifiers have been demonstrated with multi-100-mJ pulse energy, demonstrating potential for J-class operation [16] [17] [21]. Using a monolithic Yb:YAG thindisk multi-pass CPA-free laser amplifier, which geometrically multiplexes the seed beam 36 times on the thin-disk pumped at wavelength of 941 nm, we recently demonstrated 2.3 mJ of pulse energy at 1.4 kW average output power, 950 fs pulse duration and M² < 1.8 beam quality [20]. Zero-phonon-line pumping at wavelength of 969 nm improved the beam quality to M² < 1.4, i.e.…”

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confidence: 99%