Ultra broadband coherent diffractive imaging: a fast monochromatization method

Coherent diffractive imaging (CDI) as a lensless imaging technique, has been applied in a wide range of sciences. However it is not compatible with short pulse lasers, because it is limited with monochromatic illumination. Although there have been reports on the broadband CDI, the band-width is limited with 10% for robust imaging. In this article, we report a algorithm which is able to CDI robustly with at least 80% bandwidth. This algorithm is apply to published experiment data and simulated ultra-broadband data to demonstrate its ability. This technique enables us to capture the non-repeatable transient dynamics as short as the laser pulse width, which is one step forward to the ultra-fast CDI.