Abstract
KDP (potassium dihydrogen phosphate) is often chosen as a frequency doubling component for lasers because of its strong nonlinear optical properties and its possession of a high laser damage threshold. However, due to its inherent physical properties, KDP crystals are not easy to machine. In this paper, we try to polish KDP using fixed abrasive polishing technique. Copper oxide, carbon powder and phenolic resin are selected for the preparation of pellets for polishing. Orthogonal tests on the workpiece without destroying the KDP and the best process parameters were decided for the lowest roughness. The thermodynamic simulation is also used to analyze the heat of the polishing process to ensure that no thermal damage occurs to the workpiece during the machining process.
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