A medical device includes an elongate member having a proximal end, a distal end, a body extending between the proximal end and the distal end, and a lumen located within the body. The medical device also includes a tube located inside the lumen, wherein the tube is rotatably supported inside the lumen, a optical waveguide located inside the tube, and a bearing element located in the lumen and disposed between the tube and the body of the elongate member. The elongate member further has a side wall and a region at the side wall for allowing an output light from the optical waveguide to exit therethrough.
