Single mode injection seeded Nd:YAG oscillator with an adjustable pulse length between 20 and 50 ns

Cabaret, L.; Drag, Cyril

doi:10.1051/epjap:2006157

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…The laser set-up used for HR-TALIF measurements (shown schematically in figure 1), uses a commercial single-mode continuous Titanium:Sapphire (Ti:Sa) laser (Coherent MBR 110 pumped by a 10W Verdi Nd:YVO 4 laser) to seed a home-built nanosecond pulsed ring cavity Ti:Sa laser, pumped by a 20 Hz 532 nm Nd:YAG laser (Quantel CFR200) [60][61][62][63]. The seed laser is injected co-linearly with the pump laser into a Ti:Sa crystal.…”

Section: Hr-talif Setupmentioning

confidence: 99%

Oxygen atom kinetics in CO₂ plasmas ignited in a DC glow discharge

Morillo-Candas

Drag

Booth

et al. 2019

Plasma Sources Sci. Technol.

125

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Oxygen atom densities were measured in situ in a CO 2 glow discharge, at pressures between 0.2 and 5 Torr . Two measurement techniques were compared, namely optical emission actinometry (using Ar as the actinometer) and High-Resolution Two-photon Absorption Laser Induced Fluorescence (HR-TALIF) normalised to Xe, and were found to give consistent results. The variation of the atomic oxygen density with gas pressure shows two different regimes with a transition around 1 Torr. Measurements of the O atom loss frequency under plasma exposure showed that this behaviour is caused by a change in the O atom loss mechanisms, which are dominated by surface processes in our experimental conditions. The corresponding recombination probabilities on Pyrex γ O are found to vary with the gas temperature near the wall for a constant surface temperature, similarly to what has recently been obtained in pure O 2 . However, the measured values are more than two times lower than γ O obtained in a O 2 plasma in similar conditions. The O atom densities are also compared to the dissociation fraction of CO 2 determined by infra-red absorption. The obtained CO and O densities show different behaviour as a function of the energy input. The simultaneous measurement of gas temperature, electric field, O, CO and CO 2 densities and O atoms loss frequency in the same conditions provides an ideal set of constraints for validating CO 2 plasma kinetic models.

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Section: Hr-talif Setupmentioning

confidence: 99%

Oxygen atom kinetics in CO₂ plasmas ignited in a DC glow discharge

Morillo-Candas

Drag

Booth

et al. 2019

Plasma Sources Sci. Technol.

125

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“…In more details, the quasi-CW regime of the master laser consists of 150 μs pulses at a 20 Hz repetition rate. The slave laser is pumped at the same rate by a frequency-doubled flashlamp-amplified Nd:YAG laser (Cabaret and Drag 2006) and yields 10 mJ pulses in the red, which after frequency doubling in a BBO crystal becomes 2 mJ of laser output in the blue. The respective pulse durations are about 20 ns in the red and 15 ns in the blue.…”

Section: Laser Excitationmentioning

confidence: 99%

Pulsed photodetachment microscopy and the electron affinity of iodine

Peláez

Blondel

Delsart

et al. 2009

J. Phys. B: At. Mol. Opt. Phys.

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Photodetachment microscopy is carried out on a beam of 127I− ions with a nanosecond pulsed laser. The photoelectron interferograms are recorded by means of a digital camera that images the light spots produced by the amplified photoelectrons on a phosphor screen. This is the first implementation of such an optical imaging technique in photodetachment microscopy. Due to their sensitivity to the photoelectron energy, the recorded electron interferograms can be quantitatively analysed to produce a measure of the electron affinity of iodine eA(127I) with an accuracy improved by more than a factor of 2 with respect to the best previous measurement. The result is 2467 287.4(29) m−1 or 3.059 0463(38) eV.

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“…Except utilizing a longer cavity length, a low gain Q-switch was usually used to expand the pulse duration. Several tens or more than 100 ns of pulse duration have been reported by this means [4,5]. But the pulse energy was only several hundreds J when the pulse duration was expanded to more than 50 ns because of the low gain.…”

Section: Introductionmentioning

confidence: 99%