Giant Energy Gain in a Pulsed HF Laser Based on a Photon-Branched Chain Reaction

摘要

A huge energy gain is predicted theoretically in a pulsed chemical laser-amplifier based on a photon-branched chain reaction initiated in a gaseous dispersed medium composed of H_2-F_2-O_2-He and Al particles by focused external infrared radiation. It is shown that this effect is due to the possibility of ignition of the laser-chemical reaction in an initial small focal volume of the active medium. It then spreads out of this minimal volume spontaneously in the auto-wave regime without external power sources and subsequently fills the entire volume of the laser cavity with a high intensive electromagnetic field as self-supporting cylindrical photon-branching zones formed by the paths of the rays inside the unstable telescopic cavity. Calculations show that the ignition of an auto-wave photon-branched chain reaction under the condition of external signal focusing reduces strongly the input pulse energy necessary for initiation up to ～ 10~(-8) J, and thereby allows a huge value of the energy gain of ～ 10~(11). The predicted effect of this huge laser energy gain should make it possible to construct a self-contained laser, which can be initiated by a very weak source signal.