Development of a chirped pulse amplification laser with zigzag slab Nd:glass amplifiers dedicated to x-ray laser research

Abstract

A chirped pulse amplification laser with zigzag slab Nd:glass amplifiers dedicated to x-ray laser research is described. The laser provides a 1.6 ps duration pulse with approximately 7 J energy at a repetition rate of 0.1 Hz. In the power amplifier system, laser light is amplified in a two-step manner: The first step is image-relayed multipass amplification up to approximately 1 J with a 10 mm x 10 mm beam. The second step is double-pass amplification up to >10 J with a 10 mm x 90 mm beam. By using this laser system, the saturated amplification of the Ni-like Ag laser at a wavelength of 13.9 nm has been successfully demonstrated.

Morphology of a columnar stack of coronene molecules encapsulated in a single-walled carbon nanotube

“…21,22 The repetition rate of the laser is 0.1 Hz. 23 Broadband radiation emitted by the laser plasma is filtered by a 200-nm-thick zirconium filter so that monochromatic laser light is obtained. The laser spot diameter and the highest intensity focused by a concave Mo/Si multilayer mirror (having a radius R = 1000 mm) are about 40 µm and ≤ 5×10 8 W/cm 2 , respectively.…”

“…Two Nd:glass laser systems having a common oscillator and regenerative amplifier are used for this purpose. 23 One generates the X-ray laser beam, while the other synchronizes with the X-ray laser beam and is used as the IR probe beam. The probe pulse has a wavelength of 1053 nm (corresponding to hν = 1.18 eV) and a pulse width of ∼2 ps.…”

Development of Driver Laser System for 0.1-Hz X-ray Laser

“…Details of these amplifiers are described in Ref. 12. Figure 3 shows a preliminary result of amplification at 0.1-Hz repetition rate for 30 contiguous shots.…”

Nanoscale surface modifications and formation of conical structures at aluminum surface induced by single shot exposure of soft x-ray laser pulse

“…4,5 The Ag tapes were used as the plasma targets, 21 and the tape targets were irradiated by the linearly focusing laser pulses generated from a chirped pulse amplification glass laser system with zigzag slab Nd:glass amplifiers. 22 The soft x-ray seed light generated by the first Ag plasma was amplified with the second Ag plasma. Characteristics of the generated SXRL from Ag double targets had a wavelength of 13.9 nm, bandwidth of narrower than 10 −4 , duration time of 7 ps, and beam divergence of 0.35 mrad ͑H͒ ϫ 0.3 mrad ͑V͒.…”