Highly efficient Nd:YVO_4 laser by direct in-band diode pumping at 914 nm

Sangla, Damien; Castaing, Marc; Balembois, François; Georges, Patrick

doi:10.1364/ol.34.002159

Cited by 71 publications

(25 citation statements)

References 10 publications

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“…Recently, the 1 The article is published in the original. 1064 nm Nd:YVO 4 laser under direct 914 nm diode laser pumping was reported [53]. To the best of our knowledge, the 1342 nm Nd:YVO 4 laser under direct 914 nm diode laser pumping have not been reported.…”

Section: Introductionmentioning

confidence: 85%

All-solid-state Nd:YVO4 laser at 1342 nm under 914 nm diode laser pumping

Liu

Zhang

et al. 2011

Laser Phys.

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A Nd:YVO 4 crystal was pumped directly into the emitting level by a laser diode at 914 nm. We achieved an output power of 1.46 W at 1342 nm for an incident pump power of 18.3 W, corresponding to an optical to optical conversion efficiency of 8.0%. The fluctuation of the output power was better than 2.3% in the given 30 min. The beam quality M 2 factor value was equal to 1.15 at the maximum output power.

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Section: Introductionmentioning

confidence: 85%

All-solid-state Nd:YVO4 laser at 1342 nm under 914 nm diode laser pumping

Liu

Zhang

et al. 2011

Laser Phys.

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“…The wavelength is stabilized using Volume Bragg Gratings (VBGs). This zero-phonon-line pumping is particularly suitable for high-power pumping as the thermal load on the disk can be severely decreased [2,23,24]. The pump spot diameter on the disk is approximately 6-7 mm.…”

Section: Thin-disk Multipass Amplifiermentioning

confidence: 99%

Ultrafast thin-disk multipass amplifier with 1.4 kW average power and 4.7 mJ pulse energy at 1030 nm converted to 820 W and 2.7 mJ at 515 nm

et al. 2015

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In recent years, there has been a growing interest in increasing the output power of ultrafast lasers to the kW-range. This allows higher productivity for laser material processing, e.g. for cutting of carbon-fiber reinforced plastics (CFRP) or for micro-machining. We developed an Yb:YAG thin-disk multipass amplifier delivering sub-8 ps pulses with 1.4 kW average power which is -to the best of our knowledge -the highest output power reported for a sub-100 ps ultrafast laser system so far. The amplifier is seeded by a regenerative amplifier with 6.5 ps pulses and 115 W of average power at a repetition rate of 300 kHz. Taking this repetition rate into account, the energy of the amplified pulses is as high as 4.7 mJ. This was achieved using a scheme with 40 mirrors in an array to geometrically fold the seed beam 40 times over the thin-disk. The beam quality was measured to be better than M²=1.4. This system was used in first experiments to cut CFRP with very good quality and with unprecedented efficiency. Additionally, the output beam of the amplifier was frequency-doubled in an LBO crystal to 820 W (70 % conversion efficiency) output power at the second harmonic wavelength (515 nm) and 106 W (26.5 % conversion efficiency) at the third harmonic wavelength (343 nm). Both results are record output powers for ultrafast laser systems at the respective wavelengths. In the presentation, we will show concepts on further power scaling of the system.

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“…Nd:LuVO 4 has a very small absorption cross section compared with the one around 880 nm (see Fig. 2 [19]. Consequently, direct diode pumping of Nd:LuVO 4 at 915 nm can also be realized.…”

Section: Introductionmentioning

confidence: 99%