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Defense Intelligence Reference Document High-Frequency Gravitational Wave Communications

Defense Intelligence Agency · 57 pages · text from the file's own layer

This Defense Intelligence Reference Document was prepared by the Defense Intelligence Agency under its Advanced Aerospace Weapon System Applications (AAWSA) program, is dated 6 April 2010 and is part of a series of advanced technology reports produced in FY 2009. It reviews proposed laboratory generators and detectors of high-frequency gravitational waves for communications. It favors an infrared-excited molecules transmitter and the Li-Baker detector, estimating about 1.9 million bits per second over 7,000 km through the Earth. It also discusses timing standards and interplanetary navigation uses.

  • p. 6 …carry significant information content with effectively no absorption unlike electromagnetic (EM) waves. Multi-channel HFGW communications…
  • p. 10 …This Figure of merit can be extended by considering other effects since in the laboratory the…
  • p. 17 …Based upon the theory of Li, Tang and Zhao ( 1992) termed the Li-effect, the detector…
  • p. 19 …With the Li-Effect, a gravitational wave transfers energy to a separately generated electromagnetic (EM) wave…
  • p. 21 …According to the Li-Effect, the PPF detection photon flux (also called the "Poynting Vector") moves…
  • p. 55 …The design tradeoff will be whether one or two large magnets are more cost-effective than…
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Mirrors
Position of
focused GW
generated
IR monomode waveguide
formed by active material
High power IR source
Figure 3. Circular Resonator Geometry Using Infrared Excitation
Analogous to Figure 2, we see in Figure 4 the radiation pattern for a pair of orbiting
masses.
GW
l
I
T
GW
Figure 4. Radiation Pattern Calculated by Landau and Lifshitz (1975)
Next consider a number N of such orbit planes stacked one on top of another with the
gravitational-wave (GW) radiation growing flux (Wm·2) proportional to N2 as the GW
moves up the axis of the N orbit planes as in Figure 5.
8
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