The L3 HAPLS pump engine with design pulse energy of 200 J employs two Nd-doped glass amplifiers operating at 10 Hz and cooled by helium gas. Each amplifier is pumped by high power laser diode arrays, each providing an 800-kW peak power. These are the highest peak-power pulsed laser diode arrays in the world.
The femtosecond pulses are generated in a titanium-doped sapphire amplifier.
The L3 HAPLS system will also include real-time controls and a timing system, which will make it possible to synchronize its operation to the facility’s electronic master clock and later to a femtosecond-precision laser clock.
L3-HAPLS: High repetition rate Advanced Petawatt Laser System Schematic February 2021
|Design parameters||Current parameters
|Output pulse energy (main beam compressed)||>30 J in single aperture||13.3 J in single aperture|
|Pulse duration||<30 fs FWHM||27.3 fs FWHM|
|Repetition rate||10 Hz||3.3 Hz|
|Peak power||1 PW||490 TW|
|Power contrast||Initial 1:10-9 @ 50 ps, then optimized at ELI to 1:10-11 @ 50 ps|
|Pump laser technology||DPSSL||DPSSL|
|Short pulse laser technology||CPA: Ti:sapphire single aperture||CPA: Ti:sapphire single aperture|
|Output laser pulse energy RMS stability||Better than 0.6% rms|
|Output laser beam RMS pointing stability||<10 µrad||2 µrad RMS radial|
|Beam format||Rectangular superGaussian, single aperture||Rectangular superGaussian, single aperture|
|Beam size of compressed beam||214×214 mm||214×214 mm|
|Beam quality (encircled energy in a diffraction limited spot)||0.5|
Josef Cupal, email@example.com
The video of HAPLS:
L3 HAPLS laser
L3 during D8 run