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Proceedings Paper

Kilowatt average-power laser for subpicosecond materials processing
Author(s): Stephen V. Benson; George R. Neil; Courtlandt L. Bohn; George Biallas; David Douglas; H. Frederick Dylla; Jock Fugitt; Kevin Jordan; Geoffrey Krafft; Lia Merminga; Joe Preble; Michelle D. Shinn; Tim Siggins; Richard Walker; Byung Yunn
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Paper Abstract

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. We present operation 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.

Paper Details

Date Published: 3 April 2000
PDF: 6 pages
Proc. SPIE 3889, Advanced High-Power Lasers, (3 April 2000); doi: 10.1117/12.380898
Show Author Affiliations
Stephen V. Benson, Thomas Jefferson National Accelerator Facility (United States)
George R. Neil, Thomas Jefferson National Accelerator Facility (United States)
Courtlandt L. Bohn, Fermi National Lab. (United States)
George Biallas, Thomas Jefferson National Accelerator Facility (United States)
David Douglas, Thomas Jefferson National Accelerator Facility (United States)
H. Frederick Dylla, Thomas Jefferson National Accelerator Facility (United States)
Jock Fugitt, Thomas Jefferson National Accelerator Facility (United States)
Kevin Jordan, Thomas Jefferson National Accelerator Facility (United States)
Geoffrey Krafft, Thomas Jefferson National Accelerator Facility (United States)
Lia Merminga, Thomas Jefferson National Accelerator Facility (United States)
Joe Preble, Thomas Jefferson National Accelerator Facility (United States)
Michelle D. Shinn, Thomas Jefferson National Accelerator Facility (United States)
Tim Siggins, Thomas Jefferson National Accelerator Facility (United States)
Richard Walker, Thomas Jefferson National Accelerator Facility (United States)
Byung Yunn, Thomas Jefferson National Accelerator Facility (United States)

Published in SPIE Proceedings Vol. 3889: