US Patent 11676809 Light emitting sealed body and light source device

A light emitting sealed body includes: a housing containing light-emitting gas in an internal space and formed with an opening on which first light is incident and/or from which second light is emitted, wherein the first light is laser light for maintaining a plasma generated in the light-emitting gas and the second light is light from the plasma; and a window member that transmits the first light and/or the second light at the opening. The window member is joined to the housing by a joining material consisting of a material containing gold.