High temperature optical molecular anti-contamination getter system

A method for removing contaminants from an optical system comprising:

• applying sufficient energy density to contaminants in an internal ambient atmosphere in a sealed housing containing one or more optical components to drive a reaction involving the contaminants, wherein the reaction inactivates the contaminants, wherein the one or more optical components are susceptible to damage from the contaminants, wherein applying sufficient energy density to the contaminants in the internal ambient atmosphere in the sealed housing includes heating a heatable element, primarily with radiation, to a temperature that is higher than a temperature of the one or more optical components, and wherein the radiation is from one or more non-linear optical processes taking place in one or more solid non-linear optical elements.