#4725 Transmitting Energy (other than Heat) by Laser Beam
#4725 Transmitting Energy (other than Heat) by Laser Beam #4725 From a military defense perspective, can any energy other than heat be transmitted by a laser beam to a target? While high-energy lasers (HEL) are often characterized simply as "heat rays" (thermal deposition), a laser fundamentally transmits electromagnetic radiation . Depending on pulse duration, peak power, and wavelength, that electromagnetic energy can be converted into several non-thermal or hybrid energy mechanisms on a target: 1. Mechanical and Kinetic Energy (Impulse Coupling & Shock Waves) Plasma Blowoff & Recoil Impulse: Ultra-short pulsed lasers (femtosecond to nanosecond durations) deliver immense peak power before thermal diffusion can occur. The surface layer of the target instantly ionizes into a high-pressure plasma. As this plasma rapidly expands outward (ablation blowoff), Newton's third law generates a massive mechanical shock wave (impulse) into the target structure. Structural ...