The present invention relates to the supply of a sensor of an interventional device. In order to provide an interventional device with improved handling, an interventional device is provided, the device comprising a longitudinal elongated main body with a distal portion and a proximal portion； and a sensor provided on the distal portion. The elongated main body comprises a hollow shaft. The proximal portion of the main body comprises an optical energy generation section, in which the hollow shaft is at least partially provided as a transparent hypotube, and in which a doped material is provided inside the hollow shaft. Further, the doped material is configured to generate light as stimulated emission with a predetermined wavelength upon the doped material being radiated with a pumping wavelength. Still further, the transparent hypotube is configured to receive light from an external light source as a substantially transversal light input providing the pumping wavelength to the doped material. The main body further comprises a light guiding section that comprises an optical fiber arrangement inside the hollow shaft extending from the optical energy generation section toward the sensor for transmitting energy to the sensor.La présente invention concerne la fourniture d'un capteur pour dispositif d'intervention. Afin de fournir un dispositif d'intervention plus facile à manipuler, la présente invention concerne un dispositif d'intervention comprenant un corps principal allongé longitudinal comportant une partie distale et une partie proximale ； et un capteur disposé sur la partie distale. Le corps principal allongé comprend une tige creuse. La partie proximale du corps principal comprend une section de génération d'énergie optique, dans laquelle la tige creuse est au moins partiellement présente sous la forme d'un tube hypodermique transparent, et dans laquelle un matériau dopé est présent à l'intérieur de la tige creuse. En outre, le matériau dopé est conçu pour génér
