Internally cooled fluorescent device and reflector lamp arrangement including said fluorescent device

A reflector lamp arrangement comprising

• at least one reflector,
• at least one excitation laser which is designed for the emission of an excitation-laser radiation, and
• an internally cooled fluorescent device, comprising
• two disk-like carrier elements having two sides each which are arranged at a mutual distance in such a manner that one side of one carrier element faces one side of the other carrier element and as a result define two inside surfaces, facing one another, of the fluorescent device, the respective other two sides of the two carrier elements pointing toward the outside and thus defining two outside surfaces of the fluorescent device,
• at least one conversion area which contains a luminous material and is arranged on at least one of the two outside surfaces, and
• at least one opening which is arranged in at least one of the two carrier elements;
• wherein the reflector lamp arrangement is designed for the excitation-laser radiation to impinge on the at least one conversion area of the fluorescent device, to be wavelength-converted by the luminous material of the at least one conversion area and at least a part of the wavelength-converted light to impinge on the at least one reflector.