Wavelength tunable, 264 J laser diode array for 10 Hz/1ms Yb:YAG pumping

Large size crystalline vs co-sintered ceramic Yb^3+:YAG disk performance in diode pumped amplifiers

“…In order to adjust the average power on the target, we relied on the driving current of the laser diodes and/or the repetition rate of the laser diode drivers. Pump laser wavelength shift for the different average power regimes is controlled by applying a constant bias current on the laser diode stacks of up to 1 A, which is far below the lasing threshold of about 15 A [16]. Using this method we ensured that laser diode emission wavelength drifts did not affect the average absorbed pump power.…”

“…The beam diameter is about 1 mm. As pump source, the Lucia main amplifier diode array was used [16]. 41 laser diode stacks, each emitting up to 3 kW peak power in 1 ms long pulses at 940 nm, are guided on a 7 cm 2 aperture.…”

Low temperature diode pumped active mirror Yb^3+:YAG disk laser amplifier studies

“…The Lucia water cooled first laser head used to reach the 14 J milestone [7] is pumped at a rather high intensity level (15 to 20 kW/cm 2 ) [32]. The high emission cross section of Yb:YAG at low temperature [33,34] allows a significant reduction in pump budget and this second laser head requires therefore only 5.5 kW/cm 2 (~1 ms pulse duration) within a 6 cm 2 homogeneously filled elliptical footprint (43 kW Lastronics pump engines with 76% efficiency).…”

Electro-Optic Characteristics of a Cooled Deuterated Potassium Dihydrogen Phosphate Crystal

“…[7][8][9][10][11] Using Nd-or Yb-doped materials, diodepumped solid-state lasers have been developed at 1-mm wavelengths. [12][13][14][15][16] In such high power lasers, electro-optic modulators are one of the most indispensable optics for optical isolation, pulse slicing, phase modulation and polarization switching. A DKDP crystal is often used in electro-optic modulators due to its relatively high electro-optic coefficient of 25 pm/V and low laser absorption at 1 mm wavelength compared with a potassium dihydrogen phosphate (KDP) crystal.…”