Abstract: A continuous working chemical laser is disclosed. A primary gas such as hydrogen or deuterium is mixed with an activator for a secondary gas, and desirably with a buffer such as a noble gas. The primary gas mixture and a secondary gas such as fluorine are mixed at low temperature and subsequently a laser emitting chemical reaction is triggered. In one embodiment the gases are mixed in supersonic flow and the reaction is triggered by a shock wave. In another embodiment the reaction is triggered by external stimulation such as ultraviolet radiation or electric discharge or the like.