Documents / Report

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. 8 …The sensor must be capable of detecting Earth over a range of orbital radii with a…
  • p. 17 …For the purpose of this report, we envision a Lightcraft Earth-to-Orbit (ETD) transportation system…
  • p. 34 …not only placing nanosats into LEO at low cost (Figure 14), but also for performing much…
  • p. 42 …Each picosat is gravity- gradient stable, has a dipole array facing Earth, and a broader beam…
  • p. 43 …811L¥ push broom scanning mode for complete Earth coverage rather than only sampling coverage. The constellation…
  • p. 72 …The system is single-stage-to-orbit and completely reusable with no onboard propellant required (the…
  • p. 75 …J., et al. (1991), "System Requirements for Low-Earth-Orbit Launch Using Laser Propulsion," in Proc…
UNCLASSIFIED/ ,sralil &FFI&Itltl H:81! 8HLY
Master Oscillator, Power
Amplifier (MOPA)
Fiber coupled
pump modules
Master Oscillator (frber
oscillator, or diode laser)
(6+1) to 1
Combiner
l
Doped double-clad gain
f7
/High power endcap
Figure 22. Typical HPFL MOPA Design (courtesy of the Directed Energy Professional
Society).
State of the Art in Fiber Combining
Passive phasing:
far field-mteling & coupling
- -
Microlens Beamsplitter, 4%
') Array
(
' Pinhol'-;;;;.
Microlens -O _
,:1
Incoherent Beam Combining 'Ind1vidually Incoherent Gaussian Beams i=L
Controlled
/_/Steering • ... o~bined Beams;ITarget
Mirrors - -- _ Area:
~>-2R,
@},,A,.,.,,,
t :+: t Collimating
~ ~ Lenses
, Fiber Laser Array Hexagonal Beam Director
Spectral Beam Combining: fibers at
different wavelengths bu\same direction
~~,,~.,.Fiber Array = == "
•
/ Coherent beam combining (CBC)
Talbot: self-imaging coupling
•
MOPA: master feeds amps & active
phm eootrol P~•,;,•~,°'tp'\~
Maste;~---,
·•- _:: --►
Phase
control 99 ¢i
Detectors
Figure 23. Fiber Laser Beam Combining Techniques (courtesy of the Directed Energy
Professional Society).
54
UNCLASSIFIED/ ff81l 8ffll!lllit 1!191! 9HL I

Not linked to a story yet.

About this file

Report, from the dia collection. The PDF is mirrored here; the original link is above. 77 pages are in the text index: search them above, or from the library's search.