0.4 mJ quasi-continuously pumped picosecond Nd:GdVO₄laser with selectable pulse duration

Abstract

A quasi-continuously pumped picosecond oscillatoramplifier Nd:GdVO4 laser system based on two identical slabs in a single bounce geometry is reported. Pulse duration is from 160 to 55 ps resulting from the pulse shortening along the extended mode locked train from passively mode locked oscillator, which was measured directly from a single laser shot. The shortest 55 ps long cavity dumped single pulses from the oscillator with the energy of 15±1 μJ and the contrast better than 10 −3 were amplified to the energy of 150 μJ with the contrast better than 10 −3 after the single-pass amplification and to the energy of 400 μJ after the double-pass amplification.Intensity, a.u. The autocorrelation curve of the pulse from the oscillator (τp = 55±1 ps) and the amplified pulse (τp = 55±2 ps) -measured data and Gaussian fit

0.8 mJ quasi-continuously pumped sub-nanosecond highly doped Nd:YAG oscillator-amplifier laser system in bounce geometry

“…In comparison with our results obtained with Nd:GdVO 4 active material [16], using the Nd:YAG the duration of the pulse with maximum amplitude was twice shorter but the shortening effect was not so significant. The whole train energy was almost 5 times higher (using the Nd:GdVO 4 the output train energy was 185 μJ) but the threshold pump energy was 7 times higher (using the Nd:GdVO 4 the mode-locking threshold was obtained for 5.5 mJ).…”

“…In comparison with our results obtained with Nd:GdVO 4 laser oscillator-amplifier system, using the Nd:YAG the amplified pulse energy was more than 5 times higher (using the Nd:GdVO 4 the amplified pulse energy was 150 μJ after the single pass amplification [16]). …”

“…Results are compared with our previously published data obtained with similar system based on Nd:GdVO 4 active material [16] and show advantage of using highly doped Nd:YAG active material.…”

“…This measurement method is in details described in [16]. Instrumental limit of the oscilloscopephotodiode system is assumed to be 71 ps.…”

Research on diffusion-bonding composite YVO4/Nd:GdVO4 crystal

“…By means of acousto-optic Q-switch, excellent Nd:GdVO 4 lasers with high repetition rate of 100 kHz were demonstrated by X.D. Li et al [4,5] Figure 1 (online color at www.lphys.org) Temperature distributions in different laser rods laser and picosecond Nd:GdVO 4 laser were also reported by V. Kubeček et al [6,7]. Moreover, some people also researched 0.91 μm Nd:GdVO 4 laser [8,9].…”