Abstract: One topic of 2021 CUPEC is “the design and reproduction of rainbow phenomenon”. In this paper, an experimental facility based on supercontinuum laser to reproduce rainbow is designed, which can give a good demonstration. Compared to reported rainbow experiments, the designed facility not only show rainbow phenomenon clearly, but also can be used to quantitatively analyze rainbow wave optics properties, including polarization and interference. This experiment is based on the common physical phenomena in daily life, but it is consistent with the wave optics of college physics. It can be as an interesting and exploratory physics experiment.

Key words: primary rainbow and secondary rainbow, polarization, interference, supercontinuum laser