Photo-semiconductor module having thermo-element

A photo-semiconductor module having a casing and a photo-semiconductor element for emitting a light beam, an optical system and a photo-detector arranged in the casing so as to be optically coupled to each other, the light beam emitted from said photo-semiconductor element traveling through said optical system along a common optical axis and exiting said casing and said photo-detector detecting at least a part of the light beam emitted from said photo-semiconductor element and outputting a detecting signal used to control said photo-semiconductor element, said photo-semiconductor module comprising:

• a first structure on which said photo-semiconductor element and said optical system are mounted, said photo-semiconductor element being thermally coupled to said first structure such that heat, generated in said photo-semiconductor element by operation thereof, is thermally coupled therefrom to, and conducted through said first structure;
• a cooling-element, said first structure being thermally coupled to said cooling element and said cooling element thereby receiving the heat, thermally coupled from said semiconductor element to and conducted through said first structure, and thereby cooling said photo-semiconductor element;
• and
• a second structure, spaced from said first structure and said cooling element, comprising a first supporting member which supports said photo-detector and a second supporting member which supports said first supporting member so that said first supporting member is positioned above and displaced from, and thereby thermally isolated from, said cooling element within said casing.