0.3% energy stability, 100-millijoule-class, Ti:sapphire chirped-pulse eight-pass amplification system

Abstract

Highly stable operation of a two-stage multipass Ti:sapphire amplifier (a four-pass pre-amplifier and a four-pass power amplifier) for a 100-mJ-class chirped-pulse amplification system has been demonstrated by passive stabilization. By optimizing the ratio of pump energies to the two amplifiers and the optical losses artificially inserted into the second power amplifier, a root-mean-square fluctuation in pulse energy of 0.3% was achieved, which was 5 times lower than that of the pump laser. This is the lowest pulse-to-pulse fluctuation, to the best of our knowledge, obtained by the 100-mJ-class Ti:sapphire amplifiers.

Efficient and Repetitive Neutron Generation by Double-Laser-Pulse Driven Photonuclear Reaction

“…A Ti-Sapphire laser system [14], delivering 440-mJ of laser energy at 800-nm central wavelength was used in this experiment. The amplified chirped pulse was shortened with a grating pair to 25 fs of full width at half maximum (FWHM), and the laser beam was focused on a target with a F/2 parabola mirror to 2 -3 µm of FWHM diameter spot.…”

Formation of laser induced periodic surface structures (LIPSS) on Ti upon double fs pulse exposure

“…In the experiments, the T 6 -laser system (central wavelength λL=805 nm, pulse width τ =40 fs, repetition rate 10 Hz) was used for all irradiations [36] . Fig.…”

Picosecond Nd:YLF five-passes laser amplifier with 20 mJ pulse energy

“…The seed laser beam goes through the rod medium repeat edly for five passes, and the polarization direction of seed laser beam transmitting in the amplifier medium keeps perpendicular to c axis all the time. Usually wide angle off axis amplification is used for short length and larger aperture gain medium [5,16]. This is the first time using a non coaxial way in such a long length and small aperture medium for five passes.…”