Abstract
An experimental study was made of the changes in the refractive index Δn of the active media of F2+D2+He (CO2, SF6) chemical lasers during stimulated emission. It was established that 80–90% of the energy was emitted by a laser when the active medium was optically homogeneous (|Δn|≤ 2×10–7). The change in the refractive index at the end of a stimulated emission pulse did not exceed (0.7–1.5)×10–6. This change was attributed to gasdynamic motion of the medium because of its nonuniform heating by the chemical reaction.
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