© 2016 The Japan Society of Applied Physics. Femtosecond double-pulse laser induced breakdown spectroscopy (LIBS) has been performed with a double-pulse configuration composed of two polarizers. The effect of interpulse separation on the Cu I line at 510.55, 515.32, and 521.82nm showed an optimum enhancement at 50-150 ps delays, which is more than 3-5 times greater compared with the single-pulse excitation case. This enhanced emission may open new possibilities for remote LIBS detection.