Optimized, diode pumped, Nd:glass, prototype regenerative amplifier for the National Ignition Facility (NIF)

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The National Ignition Facility (NIF) will house a 2 MJ Nd:glass laser system to be used for a broad range of inertial confinement fusion experiments. This record high energy laser output will be initiated by a single low energy, fiber -based master oscillator which will be appropriately shaped in time and frequency prior to being split into 48 beams for intermediate amplification. These 48 intermediate energy beams will feed the 192 main amplifier chains. We report on the baseline design and test results for an amplifier subsystem in the intermediate amplifiers. The subsystem is based on a diode pumped, Nd:glass ... continued below

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12 p.; Other: FDE: PDF; PL:

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Martinez, M.; Crane, J.; Penko, F. & Browning, D. December 1, 1997.

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The National Ignition Facility (NIF) will house a 2 MJ Nd:glass laser system to be used for a broad range of inertial confinement fusion experiments. This record high energy laser output will be initiated by a single low energy, fiber -based master oscillator which will be appropriately shaped in time and frequency prior to being split into 48 beams for intermediate amplification. These 48 intermediate energy beams will feed the 192 main amplifier chains. We report on the baseline design and test results for an amplifier subsystem in the intermediate amplifiers. The subsystem is based on a diode pumped, Nd:glass regenerative amplifier. The amplifier is comprised fo a linear, folded, TEM{sub 00}, 4.5m long cavity and represents the highest gain (approximately 10{sup 7}) component in the NIF laser system. Two fundamentally important requirements for this amplifier include output energy of 20 mJ and square pulse distortion of less than 1.45. With a single 48 bar 4.5kW peak power diode array and lens duct assembly we pump a 5 mm diameter X 50 mm long Nd-doped, phosphate glass rod, and amplify the mode matched, temporally shaped (approximately 20ns in duration)oscillator seed pulse to 25 mJof output energy with a very acceptable square pulse distortion of 1.44. This most recent design of the regenerative amplifier has increased the performance and reduced the cost, enabling it to become a solid baseline for the NIF laser system.

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12 p.; Other: FDE: PDF; PL:

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INIS; OSTI as DE98057449

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  • BIOS `98: an international symposium on biomedical optics, San Jose, CA (United States), 24-30 Jan 1998

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  • Other: DE98057449
  • Report No.: UCRL-JC--127940
  • Report No.: CONF-980117--
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 304601
  • Archival Resource Key: ark:/67531/metadc689020

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  • December 1, 1997

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 19, 2016, 8:31 p.m.

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Martinez, M.; Crane, J.; Penko, F. & Browning, D. Optimized, diode pumped, Nd:glass, prototype regenerative amplifier for the National Ignition Facility (NIF), article, December 1, 1997; California. (digital.library.unt.edu/ark:/67531/metadc689020/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.