Digital micromirror device characterization for ultrashort laser applications

We conducted a comprehensive characterization of key phenomena in digital micromirror devices (DMD) using an ultrashort pulse beam of 98. 8 fs @800nm. Firstly, we determined the fluence threshold, which was found to be 0. 19 J/cm². Secondly, we quantified the nonlinear dispersion introduced by the DMD in the pulse beam using the SPIDER method. Our measurements revealed a second order GDD value of 473 fs², a third-order dispersion (TOD) of 3700 fs³, and a fourth-order dispersion (FOD) of -2027000 fs⁴. Our research significantly advances our understanding of DMD behavior and its interaction with ultrashort pulses, thereby optimizing their use in optical applications.