The flowing gas system was almost always used for beam path conditioning int he past to reduce thermal blooming in the high enery laser (HEL) system. For an airborne system, however, system weight is important. The non-flowing medium was considered in order to keep the system weight down. This paper shows that the combination of high thermal diffusivity and low index of reflection of helium enabels it to be used as the beam path medium at the non-flowing mode of operation.
展开▼
