Angular Spectra Tunable Random Lasing for High Contrast Imaging (Adv. Phys. Res. 3/2023)

Random Lasers An angular‐spectra‐tunable random laser based on controlling the coupling length of random lasing along a commercial optical fiber is proposed by Zhaona Wang and co‐workers in article number 2200054. The random lasing with a ring angular spectra that is obtained has promise for use as an illumination source for speckle‐free biological imaging with high contrast, for applications such as imaging onion epidermal cells without the need for a dying process.