论文信息 - Recent progress of the Integration Test Bed

Recent progress of the Integration Test Bed

The Integration Test Bed (ITB) is a large-aperture single-beam Nd:glass laser system, built to demonstrate the key technology and performance of the laser drivers. It uses two multipass slab amplifiers. There are four passes through the main amplifier and three passes through the booster amplifier. The output beam size is 360mm by 360mm, at the level of 1% of the top fluence. The designed output energy of ITB at 1053nm is 15kJ in a 5ns flat-in-time (FIT) pulse, the third harmonic conversion efficiency is higher than 70%. The first phase of the ITB has been completed in July 2013. A series of experiments demonstrated that laser performance meets or exceeds original design requirements. It has achieved maximum energies at 1053nm of 19.6kJ at 5ns and 21.5kJ at 10ns. Based on a pair of split third harmonic generation KDP crystals, the third harmonic conversion efficiency of about 70% and 3ω mean fluences as high as 8.4 J/cm2 have been obtained with 5ns FIT pulse.

[1] Jing Yuan,et al. The code SG99 for high-power laser propagation and its applications , 2005, SPIE/COS Photonics Asia.

[2] Noel A. Fleurot,et al. LIL and LMJ laser facility status , 2005, International Congress on High-Speed Imaging and Photonics.

[3] Emmanuel Bar,et al. LIL laser performance status , 2011, LASE.

[4] Deng Ying,et al. Development of laser technology in Research Center of Laser Fusion , 2013 .

[5] S. Sutton,et al. National Ignition Facility laser performance status. , 2007, Applied optics.

[6] I C Smith,et al. Performance of a prototype for a large-aperture multipass Nd:glass laser for inertial confinement fusion. , 1997, Applied optics.

[7] Lin Chen,et al. Influence of the 400mm-aperture Nd:glass slab-amplifier gain nonuniformity on 1ω(1053nm) near-field performance , 2013, Other Conferences.

[8] Mali Gong,et al. Suppression of transverse stimulated Raman scattering with laser-induced damage array in a large-aperture potassium dihydrogen phosphate crystal. , 2013, Optics express.

[9] Wei Chen,et al. Large aperture N31 neodymium phosphate laser glass for use in a high power laser facility , 2014, High Power Laser Science and Engineering.