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Atomic Physics

Faculty of Engineering, LTH

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Lund High-Power Laser Facility

The Lund high-power laser facility, founded in 1992, is one of the leading facilities in Europe for high-intensity laser-matter interactions, attosecond science and short-wavelength laser spectroscopy. Being a spearhead of the Lund Laser Centre, which is a European Major Research Infrastructure, this Facility is open not only to Swedish scien­tists, but also to scientists from the rest of Europe.

 The lasers of the High-Power Laser Facility are:

Laser NameRepetition RatePulse EnergyCenter WavelengthPulse DurationComments
Terawatt Laser10 HzUp to 1.5 J800 nm< 35 fsLaser system used for relativistic intensity experiments and particle acceleration as well as short x-ray pulses. A lower energy arm (around 100 mJ) is used for the generation of intense attosecond pulse trains in the extreme-ultraviolet spectral range via high-order harmonic generation for attosecond pump-probe experiments in atomic and molecular systems.
KHz Tuanble Laser3 kHz5 mJ770-830 nm20 fs (CEP-stable)The "work horse" for attosecond pump-probe spectroscopy within the last 15 years. The center wavelength is tunable between 770 and 830 nm. The system is also equipped with an OPA to obtain an even larger range of wavelengths. The main scientific activity is towards attosecond pump-probe experiments based on Photoelectron spectroscopy and transient absorption spectroscopy.
OPCPA200 kHz15 μJ850 nm6 fsA high-repetition rate, few-cycle, CEP-stable Optical parametric chirped pulse amplification (OPCPA) laser. The laser is used to generate short attosecond pulse trains for pump-probe experiments in the gas phase based on a homemade 3D photoelectron/ion coincidence spectrometer and on surfaces and nanostructures based on photoemission electron microscopy (PEEM). 
Ytterbium CPA1-200 kHz1 mJ (at 1 kHz), 35 μJ (at 200 kHz)1030 nm170 fsThe laser is widely tunable in repetition rate (1-200 kHz). An OPA extends the wavelength range to the visible and IR spectral range.

The first two lasers are based upon amplification in Ti:Sapphire. They have been constantly upgraded since their installation in 1992 and 1998. The third laser is based upon a different concept: OPCPA. It combines optical parametric amplification in a crystal and chirped pulse amplification where an optical pulse is stretched in time, amplified and then compressed again. These lasers have the same nominal wavelength (800 nm) but vastly different pulse energy and repetition rate.

The Lund high-power laser facility has been funded by the Knut and Alice Wallenberg Foundation and by Lund University