High energy cw-diode pumped Nd:YVO4 regenerative amplifier with efficient second harmonic generation

Lührmann, Markus; Theobald, Christian; Wallenstein, R.; L’huillier, Johannes A.

doi:10.1364/oe.17.022761

Cited by 26 publications

(17 citation statements)

References 18 publications

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“…A system has been demonstrated operating at 1 kHz with Nd:YAG amplifiers producing an output energy of 40 mJ, 48 ps duration and a corresponding average power of 40 W. 94 At higher repetition rates, a system has been presented operating with 33.7 W and 20 kHz with ∼220 ps pulse duration corresponding to 7 MW peak power. 103 Another system has been demonstrated based on Nd∶YVO 4 slab amplifier with 0.6 mJ pulse energy and 12 ps duration corresponding to an average/peak power between 46 W∕38 MW and 30 W∕50 MW. 95 All of these systems offer high performance with compact footprint due to the MOPA architecture.…”

Section: Flashlamp-pumped and Diode-pumpedmentioning

confidence: 99%

Concepts, performance review, and prospects of table-top, few-cycle optical parametric chirped-pulse amplification

et al. 2013

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Abstract. More than 20 years after the first presentation of optical parametric chirped-pulse amplification (OPCPA), the technology has matured as a powerful technique to produce high-intensity, few-cycle, and ultrashort laser pulses. The output characteristics of these systems cover a wide range of center wavelengths, pulse energies, and average powers. The current record performance of table-top, few-cycle OPCPA systems are 16 TW peak power and 22 W average power, which show that OPCPA is able to directly compete with Ti:sapphire chirped-pulse amplification-based systems as source for intense optical pulses. Here, we review the concepts of OPCPA and present the current state-of-the art performance level for several systems reported in the literature. To date, the performance of these systems is most generally limited by the employed pump laser. Thus, we present a comprehensive review on the recent progress in high-energy, high-average-power, picosecond laser systems, which provide improved performance relative to OPCPA pump lasers employed to date. From here, the impact of these novel pump lasers on table-top, few-cycle OPCPA is detailed and the prospects for next-generation OPCPA systems are discussed.

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Section: Flashlamp-pumped and Diode-pumpedmentioning

confidence: 99%

Concepts, performance review, and prospects of table-top, few-cycle optical parametric chirped-pulse amplification

et al. 2013

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“…2. The pump laser system [15] includes an actively mode-locked Nd:YVO 4 oscillator [16], a pulse picker, a 20 kHz Nd:YVO 4 regenerative amplifier and a frequency doubling set-up. The pump pulses at λ = 532 nm have an energy of about 1.3 mJ and a duration of about 250 ps.…”

Section: Non-collinear Opcpa Set-upmentioning

confidence: 99%

A sub-10 fs noncollinear optical parametric chirped pulse amplifier pumped at 20 kHz pulse repetition rate

et al. 2013

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We demonstrate a two-stage three-pass non-collinear optical parametric chirped-pulse amplifier delivering 125 ñJ pulse energy at 20 kHz repetition rate, corresponding to an average power of 2.5 W. The system is pumped by a 20 kHz Nd:YVO 4 regenerative amplifier system. A grism-pair stretcher stretches the 6 fs seed pulses to more than 100 ps from 650 nm to 1000 nm. The amplified signal pulses are compressed with SF57 and fused silica glass blocks. Using an acousto-optical programmable dispersive filter to compensate the residual higher-order dispersion pulses of 9.6 fs duration are obtained which corresponds to a peak power of 13 GW. We estimate the level of parametric superfluorescence with the spectral hole technique.

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“…Nd:YVO 4 enjoys large absorption and stimulated emission cross sections that may easily lead to high gain but weak thermal property due to the low thermal conductivity and high energy transfer upconversion (ETU) coefficient. In addition, an 888 nm pumping scheme is an effective way to compensate thermal effect for output properties upgrading in Nd:YVO 4 laser, which has been widely used in Q-switched [3], mode-locked [4,5] oscillators, pulse amplifiers [6,7] and optical parametric technology [8]. In particular, high-power Q-switched neodymium pulse lasers are widely used in laser machining manufacture [9] and the thermal effect is a key factor.…”

Section: Introductionmentioning

confidence: 99%

Four-Dimensional Thermal Analysis of 888 nm Pumped Nd:YVO4 Dual-Rod Acousto-Optic Q-Switched Laser

et al. 2017

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Abstract:A theoretical analysis upon the four-dimensional (4D) spatio-temporal temperature dependent dynamics of 888 nm pumped Nd:YVO 4 dual-rod laser is established, which is valid in both continuous-wave (CW) and acousto-optic (AO) Q-switched pulse lasers conditions. Our model can accurately solve the 4D thermal generation and temperature evolution not only in the steady Q-switched state, but also in the first few unstable giant or dwarf pulses region. Factors including ground state depletion (GSD), energy transfer upconversion (ETU), fluorescence branching ratios, temperature-dependent cross sections and nonradiative relaxations processes are comprehensively considered for precisely estimating thermal effects, valid in both the steady pulse region and the unstable region at the beginning. Moreover, temporal and spatial temperature profiles and their coupling effect on output properties at different repetition-rates are discussed. Experiments of high-power high-repetition-rate 888 nm end-pumped Nd:YVO 4 dual-rod CW and AO Q-switched lasers are also firstly presented and the experimental results enjoy good consistency with our theory.

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High energy cw-diode pumped Nd:YVO4 regenerative amplifier with efficient second harmonic generation

Abstract: We report on a 888 nm diode-pumped Nd:YVO4 regenerative amplifier with up to 33.7 W output power with a repetition-rate of 20 kHz and an adjustable pulse duration between 217 ps and 1 ns. This setup allowed for efficient second harmonic generation with an efficiency of up to 79%.

Cited by 26 publications

References 18 publications

Concepts, performance review, and prospects of table-top, few-cycle optical parametric chirped-pulse amplification

Concepts, performance review, and prospects of table-top, few-cycle optical parametric chirped-pulse amplification

A sub-10 fs noncollinear optical parametric chirped pulse amplifier pumped at 20 kHz pulse repetition rate

Four-Dimensional Thermal Analysis of 888 nm Pumped Nd:YVO4 Dual-Rod Acousto-Optic Q-Switched Laser

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