We　present　a　doping　method　to　improve　the　femtosecond　laser　ablation　rate　and　promote　ablation　selectivity.　Doping　transition　metal　ions,　Co2+　or　Cu2+,　in　silicate　glass　apparently　change　absorption　spectroscopy　and　induce　resonant　absorption　at　wavelengths　of　600　and　800　nm,　respectively.　Comparing　with　femtosecond　laser　processing　of　the　same　glass　without　doping,　we　find　that　the　threshold　fluence　decreases　and　the　ablation　rate　increases　in　resonant　absorption　in　doped　silicate　glass.　Resonant　absorption　effectively　increases　multiphoton　ionization　for　seed-free　electron　generation,　which　in　turn　enhances　avalanche　ionization.