A kilowatt average power laser for sub-picosecond materials processing

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The performance of laser pulses in the sub-picosecond range for materials processing is substantially enhanced over similar fluences delivered in longer pulses. Recent advances in the development of solid state lasers have progressed significantly toward the higher average powers potentially useful for many applications. Nonetheless, prospects remain distant for multi-kilowatt sub-picosecond solid state systems such as would be required for industrial scale surface processing of metals and polymers. The authors present operational results from the world's first kilowatt scale ultra-fast materials processing laser. A Free Electron Laser (FEL) called the IR Demo is operational as a User Facility at Thomas ... continued below

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639 Kilobytes pages

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Benson, Stephen V.; Neil, George R.; Bohn, C.; Biallas, G.; Douglas, D.; Dylla, F. et al. November 1, 1999.

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The performance of laser pulses in the sub-picosecond range for materials processing is substantially enhanced over similar fluences delivered in longer pulses. Recent advances in the development of solid state lasers have progressed significantly toward the higher average powers potentially useful for many applications. Nonetheless, prospects remain distant for multi-kilowatt sub-picosecond solid state systems such as would be required for industrial scale surface processing of metals and polymers. The authors present operational results from the world's first kilowatt scale ultra-fast materials processing laser. A Free Electron Laser (FEL) called the IR Demo is operational as a User Facility at Thomas Jefferson National Accelerator Facility in Newport News, Virginia, USA. In its initial operation at high average power it is capable of wavelengths in the 2 to 6 micron range and can produce {approximately}0.7 ps pulses in a continuous train at {approximately}75 MHz. This pulse length has been shown to be nearly optimal for deposition of energy in materials at the surface. Upgrades in the near future will extend operation beyond 10 kW CW average power in the near IR and kilowatt levels of power at wavelengths from 0.3 to 60 microns. This paper will cover the design and performance of this groundbreaking laser and operational aspects of the User Facility.

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639 Kilobytes pages

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  • SPIE High Power Laser Processing Applications, Osaka (JP), 11/01/1999--11/05/1999

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  • Report No.: DOE/ER/40150-1274
  • Report No.: JLAB-ACC-99-18
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 754673
  • Archival Resource Key: ark:/67531/metadc708510

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • November 1, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • July 13, 2017, 3:26 p.m.

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Benson, Stephen V.; Neil, George R.; Bohn, C.; Biallas, G.; Douglas, D.; Dylla, F. et al. A kilowatt average power laser for sub-picosecond materials processing, article, November 1, 1999; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc708510/: accessed December 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.