Polycrystalline　diamond　(PCD)　is　extensively　used　as　cutting　tool　in　machining　hard-to-machine　materials　for　its　excellence　performance　such　as　hardness,　toughness　and　wear　resistance.　However,　it　cannot　or　is　hard　to　machine　by　traditional　techniques.　As　laser　material　removal　is　an　effective　processing　technique　for　hard　materials　a　frequency　tripled　Nd:YAG　laser　(λ=355nm,　Pmax=10W,　FWHM=15ns,　M2