The Diolaze is a Diode laser made by Invasix (International) aka Inmode (USA). The Diolaze is one of the larger spot sizes for diode laser which makes treatments with it fairly quick and efficient. The Diolaze has the advantage of having a large spot size (this means your treatments will be relatively quicker).
Pain-Free Precision Cooling Technology in Laser Hair Removal
The science behind this is that unmyelinated fibers (type C) pain fibers transmit the heat sensation as pain. Cooling the area can prevent those fibers from discharging. By pre cooling the nerve fibers, the nerve fibers are less likely to fire making the procedure much more comfortable. Cooling during the laser as well as after helps prevent the pain fibers from discharging. One limitation of some laser systems is that patients will experience pain during the procedure forcing the laser to be used at lower energy (fluences) which can lead to less effective laser hair removal. By making the laser hair removal procedure much more comfortable, patients will be able to tolerate higher fluences and have a more effective end result.