The new Legend Duo HE+
is based on two-stage amplification to provide the ideal combination of high pulse energy with exceptional energy stability (< 0.5% rms), pointing stability (< 10 microrad rms) and superior beam quality (M2 < 1.5). Specifically, the seed input is amplified in a regenerative amplifier designed to ensure superior beam quality and stability. The output of this regenerative amplifier is then boosted to higher pulse energy by use of a single pass amplifier. Both amplifier stages use Coherent’s unique slab-rod design to enable efficient thermoelectric cooling of the Ti:Sapphire gain crystal and full exploitation of Coherent’s high energy (> 45 mJ) Evolution pump laser
Applications for the Legend Duo HE+ span several areas of research. Examples include pump-probe spectroscopy using multiple optical parametric amplifiers (OPAs), high harmonic generation (HHG) to enable experiments in attosecond physics, generation of high power THz pulses, and photocathode illumination for applications in high-field physics.