Local two -way DPAL laser instrument that flows in turn of gain medium

The utility model provides a local two -way DPAL laser instrument that flows in turn of gain medium -, it includes steam chamber, alkali metal formation device, alkali metal recycling device, circulation subsystem, pumping module and resonance subassembly, consequently the alkali metal vapour of this DPAL laser instrument only flows in the part, only has near the region in steam chamber need maintain higher temperature, and other area temperature can be in normal atmospheric temperature, greatly reduced the requirement of laser instrument to vacuum heat resistance, because the alkali metal vapour very active with chemical property confines near steam chamber to, avoided alkali metal vapour and pipeline and the interior device of pipeline to take place the consumption that the reaction results in alkali metal, pipeline and fan need not to expose under high temperature environment, and contactless alkali metal vapour, have greatly reduced the pollution of alkali metal atom to wind channel and cavity, have avoid