A device for supplying laser radiation is described. The device has adjustable focusing or a fixed geometry. The device can be connected as required to cystoscopes or endoscopes including those provided with a translation element commonly used for resection. The device is also connected to separate laser sources or to a single laser source whose emission is suitably divided and conveyed in two or more outgoing fibres. The device can be used for the purposes of resection, vaporization and/or cutting and/or ablation, and/or for haemostasis, providing results similar to those of conventional resection procedures using an electrosurgical scalpel/resector.
