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Defense Intelligence Reference Document Laser Lightcraft Nanosatellites

Defense Intelligence Agency · 77 pages · text from the file's own layer

This Defense Intelligence Reference Document from the Defense Intelligence Agency, dated 1 November 2010, was produced under the Advanced Aerospace Weapon System Applications (AAWSA) Program. It describes nanosatellite technologies and proposes launching nanosats into orbit with laser Lightcraft propulsion. It also covers a weapon mission selection study and multi-megawatt laser options. The author recommends that the Department of Defense and NASA bring Lightcraft R&D back to the United States and restart the X-50LR flight demonstration program.

  • p. 15 …The laser-propelled vehicle, called "Ughtcraft" because it flies on a beam of laser light, is…
  • p. 16 …reaching tens of atmospheres) that generates thrust in the direction of the laser beam. A lip…
  • p. 44 …surface accuracy of centimeters in the visible light region. It is constructed of thin film with…
  • p. 53 …by combining the beams of several lower-power devices, or a combination of all these until…
  • p. 55 …A new technology that enables the scaling-up of BSSSL beam power is a recently developed…
  • p. 59 …Neodymium Thulium (Tm 3+), Holmium - Range of beam wavelengths(),) produced: 0.48 μm to 2.9…
  • p. 63 …In the quantum picture of how FELs operate, the "wiggling" electrons radiate light and that light…
  • p. 65 …speed of light. 'MeV "' Mega-electron Volt. •sRL = distance for the area of the beam waist…
  • p. 69 …is French for "elbow," meaning a beam of light is bent in a zigzag manner through…
  • p. 75 …G. (1972), "Review of Laser-Solid Interactions and Its Possibilities for Space Propulsion," NASA Technical Memorandum…
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SUMMARY OF EMERGENT HIGH-POWER SOLID-STATE AND FREE-
ELECTRON LASER TECHNOLOGIES
Bulk Slab Solid-State Laser
Under the auspices of the Joint High Power Solid-State Laser (JHPSSL) program,
Northrop Grumman broke the all-important 100 kW beam power threshold in early
2009 by firing a 7-amplifier chain bulk slab solid-state laser (BSSSL) that produced a
beam output power of almost 106 kW (see Figure 19). Each amplifier chain is
assembled with several high-gain power modules. The laser operated for more than
five minutes, achieved electro-optical efficiency of 19.3%, and reached full power in
less than 0.6 seconds with a beam quality of better than 3.0, Whereas the test
demonstration saw five minutes of continuous operation for the laser, altogether the
system has been operated at above 100 kW beam power for a total duration of more
than 85 minutes. Adding an eight amplifier chain that the system was designed for will
increase the beam power to 120 kW.
Figure 19. Northrop Grumman's Joint High Power Bulk Slab Solid·State Laser (courtesy of
the Directed Energy Professional Society).
Even though 100 kW beam power has long been the proof-of-principle sought for
weapons-class lasers, it should be noted that many militarily useful effects can be
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Report, from the dia collection. The PDF is mirrored here; the original link is under it. 77 pages are in the text index: search them above, or from the library's search.