<title>Design of 60-kJ SG-III laser facility and related technology development</title>

Abstract

The SG-III laser facility has been proposed to produce 1ns, 60-Id blue light pulses for ICF application at China Academy ofEngmeenng Physics The baseline design suggests that the SG-III be a 64-beam laser facility grouped into eight bundles with clear optical apertures of3Ocm x 30cm The facility consists ofmultiple subsystems, including the front end, preamplification and injection section, main amplifiers, beam transport and alignment system, switchyard, target area, integrated computer control, and beam diagnostics The amplifier column in each bundle contains eight beamlets stacked 4 high by 2 wide Great progress has been made m developing key laser technologies, such as integrated fiber optics, binary optics, adaptive optics, four-pass amplification, large aperture piasma electrode switches, rapid growth ofKDP brand-new laser glass, long fiashlamps, precision manufacturing of large optics and metalhzed self-healing capacitors Codes have been developed and numencal simulations have been conducted for the optical design ofthe facility The design ofthe Techmcal Integration Line ( TIL ) of 2 x 2 segmented array as a prototype module ofSG-III has been optimized and the construction will soon get started.

Influence of oil contamination on the optical performance and laser induced damage of fused silica

“…High peak power laser systems such as National Ignition Facility (NIF) [1], Laser MegaJoule (LMJ) [2], and SG-III [3] are being developed for inertial confinement fusion (ICF) experiments and for the study of material property at extreme conditions. Thousands of optical components including fused silica glass are needed for these laser facilities, which are used for lenses, mirrors, debris shields etc.…”

Effect of subsurface impurities of fused silica on laser-induced damage probability

“…For large-aperture, high-power laser systems, such as the National Ignition Facility in the United States, 1,2 Laser Megajoule in France, 3 and the SGIII laser facility in China, 4 the ultraviolet optical lifetime of fused silica must be increased. The polishing contaminants in the near-surface region of optical components can absorb sub-band gap light and produce a local heating that can initiate a material damage.…”

Comparison of fused silica and oxyfluoride glass on laser induced initial damage morphology

“…Applications of high energy lasers(HEL), such as Laser MegaJoule project(LMJ) [1], National Ignition Facility(NIF) [2], SHENGUANG Ⅲ [3], require optical window materials provided with fine optical performance under high fluence of laser. Fused silica is the main choice for engineering due to its high optical transparency and uniformity in the ultraviolet(UV) region [2].…”