Efficient temporal compression of coherent nanosecond pulses in a compact SBS generator-amplifier setup

Schiemann, S.; Ubachs, Wim; Hogervorst, W.

doi:10.1109/3.556004

Cited by 74 publications

(31 citation statements)

References 24 publications

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“…The pulses were first passed through a SBS system, similar to the one described by Schiemann et al 16,17 The methods of laser-pulse compression by SBS in water can result in a pulse output with about 1 ns duration and about 150 mJ single-pulse energy. For obtaining a tunable excitation source, a dye laser (Continuum Nd-60) was employed and pumped by the temporarily compressed laser pulses.…”

Section: Methodsmentioning

confidence: 99%

Lifetime measurements in neutral and singly ionized vanadium

Jiang

Lundberg³

2006

J. Opt. Soc. Am. B

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Section: Methodsmentioning

confidence: 99%

Lifetime measurements in neutral and singly ionized vanadium

Jiang

Lundberg³

2006

J. Opt. Soc. Am. B

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“…Conventional Nd:YAG lasers provide pulses with a duration of about 10 ns, but for precision lifetime measurements the excitation pulse must be shorter than the investigated lifetime. The pulses were therefore compressed to 1 ns utilizing stimulated Brillouin scattering in a water cell (Schiemann et al 1997) and thereafter pumped a tunable dye laser working on a red dye. The dye laser light was then converted to wavelengths around 2100 Å using frequency tripling in nonlinear crystals.…”

Section: Laser Experimentsmentioning

confidence: 99%

Experimental and theoretical studies of lifetimes and transition probabilities for AuII

Zhang¹,

Brage

Curtis

et al. 2002

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

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We report lifetime measurements for three of the 5d 9 6p levels in Au II and relativistic multiconfiguration Dirac-Fock (MCDF) calculations of lifetimes and transitions probabilities in this ion. The work was motivated by significant disagreements between previous experimental 5d 9 6p lifetimes, obtained by means of the beam-foil (BF) method and theoretical data based on Hartree-Fock calculations in which relativistic effects were included as perturbations. The new measurements, based on laser-induced fluorescence, support the BF data and are also in excellent agreement with the MCDF results. We confirm that, while computational methods which include perturbative relativistic corrections appear to be adequate for moderately heavy elements such as Ag, fully relativistic calculations are essential for describing systems as heavy as Au.

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“…2. Brillouin reduction by broadening the pump source [17,20]. Brillouin gain is reduced by using pump linewidths larger than Brillouin linewidths.…”

Section: Reduction Of the Backward Brillouin Scatteringmentioning

confidence: 99%

Lowering backward Raman and Brillouin scattering in waveguide Raman wavelength converters

Huy

Delaye

Pauliat

et al. 2017

J. Eur. Opt. Soc.-Rapid Publ.

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Background: Liquid filled hollow core fiber Raman wavelength converters are devices enabling to red-shift the wavelength of laser beams delivered by either fixed wavelength or tunable lasers. Most of the reported converters operate in a pulsed regime with pulse durations comprised between a few hundreds of picoseconds and up to a few nanoseconds, and energy of a few micro-Joules. However, and depending on the pulse duration, the optimization of Raman converters turns to be rather challenging since the desired forward Raman scattering may compete with counter-propagating nonlinear effects like Raman and Brillouin back-scatterings. The Brillouin back-scattering is especially hard to cancel since the Brillouin gains are usually larger than the Raman gains. Techniques have already been investigated but are not fully satisfactory. Our aim in this paper is to propose a technique to optimize the Raman forward scattering and to minimize these back-scattering effects. Methods: We compare the interaction lengths in the forward and backward directions in the above-mentioned temporal regimes. If the fiber length is higher that the backward effective length of interaction then the backward effects should decrease at the benefit of the forward Raman scattering. Numerical simulations enable to estimate more precisely how long the fiber should be to get large Raman conversion efficiency and negligible Brillouin scattering. Results and discussion: To validate this technique we build two identical Raman converters differing only by the fiber lengths (0.5 m and 1.5 m). We present the experimental setup. The experimental results are confronted to the numerical simulations. As expected increasing the fiber length strongly decreases the Brillouin scattering. Conclusions: We have proposed a simple and efficient solution to minimize Brillouin back-scattering in Raman wavelength converters by optimizing the fiber length. The experimental demonstration was conducted with low energy (≈ 6 μJ) but the energies should scale with the fiber effective area if more energy is needed, without affecting the conversion efficiencies.

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Efficient temporal compression of coherent nanosecond pulses in a compact SBS generator-amplifier setup

Cited by 74 publications

References 24 publications

Lifetime measurements in neutral and singly ionized vanadium

Lifetime measurements in neutral and singly ionized vanadium

Experimental and theoretical studies of lifetimes and transition probabilities for AuII

Lowering backward Raman and Brillouin scattering in waveguide Raman wavelength converters

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