A thermal management apparatus and method for a thin disk laser system enabling the laser system to have near isothermal temperatures across and throughout a thin disk comprising a mechanically controlled oscillating heat pipe having effective thermal conductivity of 10-20,000 W/m*K that promotes near isothermal conditions in lasing of the thin disk, a thin disk lasing crystal or ceramic bonded to the mechanically controlled oscillating heat pipe, and a supporting structure including a surface bonded to the thin disk that matches the CTE (coefficient of thermal expansion) of both materials.