GAS LASER

摘要

A laser having a gaseous mixture including carbon dioxide as the lasing medium, wherein the lasing medium is cooled to a temperature such that the thermal population of the lower energy level of an output lasing transition between a higher energy level and a lower energy level of the carbon dioxide molecule is reduced, and the lasing medium is initially energised to create the population inversion which results in the lasting transition at a rate such that significant thermal population of the lower energy level is avoided.