Medical Devices, including, Catheters, including, laser catheters, laser ablation catheters, aspiration catheters, deflecting tip catheters, laser catheters including mechanical cutters, and laser catheters including a mechanical blade; Aspiration devices, including, aspiration tubing, filters, suction pumps, containers, and suction cannulas; Laser systems, including, laser pumps, solid state lasers, and laser ablation systems including aspiration, laser ablation systems including photo-acoustical feedback sensing, and laser ablation systems including sensors to detect specific tissue types; Laser ablation systems for the use in medical purposes, including, the treatment of stenosis, artery stenosis, in-stent restenosis, restenosis and other occlusions, including, laser ablation catheters used in atherectomy, angioplasty, laser angioplasty procedures, peripheral interventional procedures, cardiac interventional procedures and other interventional procedures, including, the removal of cardiac leads, the removal of pacemaker leads, crossing total occlusions (CTO), treatment of peripheral artery disease (PAD), treatment of coronary artery disease (CAD), the removal of thrombus, treatment for thrombectomy using a combination of laser systems, laser catheters, aspiration catheters, aspiration tubing, and mechanical cutters, and treatment of tumor ablations, treatment of barrett's disease, treatment of esophageal diseases, and treatment of stomach and intestinal growths; Lasers for medical and surgical use, including, for using operating software and a graphical user interface; Balloons, guidewires, and sheaths, including, for the use in peripheral interventional procedures, cardiac interventional procedures and other interventional procedures