Spectral enhancement in optical parametric amplifiers in the saturated regime

Bigourd, Damien; Patankar, S.; Robbie, S.I. Olsson; Doyle, Hugo; Mecseki, Katalin; Stuart, Nicholas; Hadjicosti, K.; Leblanc, Nathalie; New, G.H.C.; Smith, R. A.

doi:10.1007/s00340-013-5519-x

Cited by 9 publications

(4 citation statements)

References 15 publications

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“…Optically levitated droplets were irradiated with ∼450 fs pulses from a highcontrast hybrid optical parametric chirped-pulse amplification (OPCPA)/Nd:Glass ∼1TW (0.3 J) laser system operating at 1054 nm. 35 A 2 in., 20 cm focal length gradient-index (GRIN) lens focused the interaction beam onto target producing a spot size of ∼7 µm (FWHM), a Rayleigh range of ∼135 µm, and a peak intensity of ∼10 17 W cm −2 . To pre-align the laser and plasma diagnostics, a 50 µm wire mounted on a translation stage, horizontally and perpendicular to the irradiating laser beam, was first placed at the target chamber centre.…”

Section: Intense Laser Interaction Experimental Setupmentioning

confidence: 98%

An in-vacuo optical levitation trap for high-intensity laser interaction experiments with isolated microtargets

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Donnelly

Giltrap

et al. 2015

Review of Scientific Instruments

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We report on the design, construction, and characterisation of a new class of in-vacuo optical levitation trap optimised for use in high-intensity, high-energy laser interaction experiments. The system uses a focused, vertically propagating continuous wave laser beam to capture and manipulate micro-targets by photon momentum transfer at much longer working distances than commonly used by optical tweezer systems. A high speed (10 kHz) optical imaging and signal acquisition system was implemented for tracking the levitated droplets position and dynamic behaviour under atmospheric and vacuum conditions, with ±5 μm spatial resolution. Optical trapping of 10 ± 4 μm oil droplets in vacuum was demonstrated, over timescales of >1 h at extended distances of ∼40 mm from the final focusing optic. The stability of the levitated droplet was such that it would stay in alignment with a ∼7 μm irradiating beam focal spot for up to 5 min without the need for re-adjustment. The performance of the trap was assessed in a series of high-intensity (10(17) W cm(-2)) laser experiments that measured the X-ray source size and inferred free-electron temperature of a single isolated droplet target, along with a measurement of the emitted radio-frequency pulse. These initial tests demonstrated the use of optically levitated microdroplets as a robust target platform for further high-intensity laser interaction and point source studies.

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Section: Intense Laser Interaction Experimental Setupmentioning

confidence: 98%

An in-vacuo optical levitation trap for high-intensity laser interaction experiments with isolated microtargets

Price

Donnelly

Giltrap

et al. 2015

Review of Scientific Instruments

Self Cite

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“…By increasing the signal-to-noise ratio in the nanosecond OPA, the nanosecond contrast is increased [7]. A similar scheme, though using full CPA to create more energetic pump beams, also has been reported [14].…”

Section: Introductionmentioning

confidence: 83%

Contrast enhancements to petawatt lasers using short pulse optical parametric amplifiers and frequency doubling

et al. 2014

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This paper describes the integration of a short pulse optical parametric amplifier into the chirped pulse amplification beam lines of the Orion laser facility. This enables Orion to generate petawatt laser pulses at 1054 nm with a nanosecond contrast of >10(10). By combining this with frequency-doubling post compression, we can generate 100 J, 500 fs laser pulses with a nanosecond contrast calculated to be ∼10(18).

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“…The generation of near infrared tunable (900-1300 nm) ultra-short pulses from a unique laser source at fixed center wavelength is highly important for many applications including non linear microscopy [1], optical coherence tomography [2] or laser pulse synchronization [3,4]. For example, optical parametric amplifier (OPA) requires at least two spectrally shifted pulses to seed and pump a non linear crystal [5,6] or a fiber [7]. The synchronization of the pulses can be achieved passively when one pulse generates the other one through nonlinear processes enabling timing-jitter-free laser system with no complex electronic feedback loop [8].…”

Section: Introductionmentioning

confidence: 99%

Near infrared tunable source delivering ultra-short pulses based on an all normal dispersion fiber and a zero dispersion line

Fourcade-Dutin

Bigourd

2018

Appl. Phys. B

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Spectral enhancement in optical parametric amplifiers in the saturated regime

Cited by 9 publications

References 15 publications

An in-vacuo optical levitation trap for high-intensity laser interaction experiments with isolated microtargets

An in-vacuo optical levitation trap for high-intensity laser interaction experiments with isolated microtargets

Contrast enhancements to petawatt lasers using short pulse optical parametric amplifiers and frequency doubling

Near infrared tunable source delivering ultra-short pulses based on an all normal dispersion fiber and a zero dispersion line

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