One of the first suggested means for the laboratory generation of HFGWs was the so-called gaser analogous to the laser for light. Simply described (Halpern and Laurent, 1964), the gaser consists of a long rod of a material and microscopic parts of which can be excited by a means, such as electromagnetic (EM) radiation, to emit HFGWs. They utilize linearized theory to treat the interaction of a gravitational field with matter: “Application is made to the emission ... of gravitons by microscopic systems such as molecules and nuclei.” [High-Frequency Gravitational Wave Communications Study (GravCom®)]