Picosecond laser system with 30-W average power via cavity dumping and amplifying

Picosecond Nd:YLF five-passes laser amplifier with 20 mJ pulse energy

“…The traditional four passes amplifier is an effective device for energy scaling [12,13]. A faraday rotator is placed between the amplifier head and the end mirror to produce 90° rotation for the injected pulses every round trip, as a result, in the active medium, the polar ization direction of injected pulses have changed twice, and the polarization direction of seed laser beam makes no difference in a isotropic medium.…”

High efficiency and good beam quality of electro-optic, cavity-dumped and double-end pumped Nd:YLF laser

“…Compared with other Q switching technique, electro optical cavity dumping technology is easier to realize short pulse width and the relative stabile laser output. With the same energy, the shorter pulse width will be corresponding to the higher peak power to meet high peak power and high beam pulse output [1][2][3][4][5]. V. Kube ek et al reported the amplification of the cavity dumped pulses from the oscillator by the second Nd:GdVO 4 slab crystal in the bounce geometry in the single and double pass configuration [6].…”

“…In practice, to eliminate the sub pulses is always at the expense of more energy, such as multistage amplifica tion to achieve high energy output will result in com plication in the system. 1 The article is published in the original. c ∨ The crystal of Nd:YLF has the advantages of long fluorescence life, small nonlinear refractive index and high damage threshold.…”

Hybrid high-energy high-power pulsewidth-tunable picosecond source

“…By cascading several amplification stages or using multipass geometries, energies of several hundreds of microjoules can be obtained in 10 ps pulses [9,10]. However, the narrow spectral emission cross section of neodymium does not allow the generation of pulse durations below 10 ps [10,11]. Moreover, average power scaling of these systems is limited by the relatively large quantum defect.…”

“…The DPA architecture is used to scale the pulse energy beyond the self-focusing threshold both in the fiber amplifier and in the Yb:YAG bulk amplifier. This system has the advantage to be relatively simple compared to already existing sources used for the same applications [11,19]. This results in a source capable of delivering 3 ps, 350 μJ pulses at a repetition rate of 50 kHz, corresponding to 17.5 W average power.…”