Catheter for visualizing ablated tissue comprises a catheter body； a distal tip positioned at a distal end of the catheter body, the distal tip defining a illumination cavity, the distal tip having one or more openings for exchange of light energy between the illumination cavity and tissue； a light directing member disposed within the illumination cavity, the light directing member being configured to split light energy received from a light source into multiple beams and to such beams to the tissue through the corresponding more openings in the distal tip.
