Random lasing photo-curable composition for use as random lasing gain medium

The present invention relates to a random lasing photo-curable composition (1) for use as random lasing gain medium comprising: - laser dye molecules (11); - an optical glue (12) for the laser dye molecules to be suspended therein; wherein the optical glue is mercapto ester-based and comprises methacrylate and/or derivatives thereof. The present invention also relates to a random lasing system with a gain medium made of at least partially of random lasing photo-curable composition, and methods for manufacturing such random lasing system.