LED-pumped Cr:LiSAF laser system operating at 100 Hz based on a multipass amplifier

Hussein Taleb (1) , Catherine Le Blanc (1, 2) , Elio Thellier (1) , Pierre Pichon (1) , Frédéric Druon (1) , François Balembois (1) , Patrick Georges (1)

1 Laboratoire Charles Fabry / Lasers
2 LULI - Laboratoire pour l'utilisation des lasers intenses

The LED-pumping technology is used for the first time, to the best of our knowledge, to develop a complete master oscillator power amplifier (MOPA) system including a multipass amplifier. A pumping head using an original slab architecture is developed integrating a Cr:LiSAF slab pumped by 2112 blue LEDs via a Ce:YAG luminescent concentrator. The slab configuration enables the reaching of a large number of passes—up to 22—together with access to efficient cooling, allowing for a repetition rate scale up. For 22 passes, the amplifier delivers pulses with energy up to 2.4 mJ at 10-Hz repetition rate with a gain of 4.36 at 825 nm. A complete study of the MOPA is described, concluding in nearly constant performances versus the repetition rate, up to 100 Hz.

Domaines: Optique [physics.optics]

Hussein Taleb, Catherine Le Blanc, Elio Thellier, Pierre Pichon, Frédéric Druon, et al.. LED-pumped Cr:LiSAF laser system operating at 100 Hz based on a multipass amplifier. Optics Letters, 2022, 47 (14), pp.3543-3546. ⟨10.1364/OL.465115⟩. ⟨hal-04322138⟩