![]() They achieve this by not having to reflect the beam off of mirrors and refocus the beam through a myriad of lenses, thereby maintaining all of the power being produced at the source. In a previous article, Why the Kilowatt is not the King, we discovered that Fiber Lasers get more power from the resonator, or power source, to the cutting head. Ultimately it comes down to the material you are cutting type and thickness of it. ![]() They do so as they have seen there is a marked difference in the technologies, capabilities and more importantly their performance in certain materials, thicknesses and special applications. But who is right? Which technology is better and how does it affect your bottom line?Ī clue to the answer is the realization that most manufacturers still offer BOTH CO2 and Fiber Laser Technologies in their machinery product offering. Fiber Laser, which is better? This has been a common discussion in manufacturing circles for several years now as Laser purists insist CO2 was the better technology and others promoting the new innovations of Fiber Lasers, insist just the opposite is true. ![]() Furthermore, an appropriate geometry can preserve applicator integrity avoiding excessive temperature increase on its surface.CO2 vs. Results suggest that the selection of the applicator based on the geometry of the lesion could improve LITT outcome. ![]() Results show that bare fiber causes an irregular coagulation shape zebra and hybrid applicators 3 cm-long obtain an elliptical lesion, with lowest maximum T (Tmax) on their surface (about 350 K) cylindrical applicators with length of 1 cm or 1.5 cm produce spherical lesions, with Tmax up to 398 K. Simulations were performed with laser power of 3 W and 5 W and energy of 1650 J. Effects on liver tissue undergoing LITT were evaluated in terms of T and coagulation volumes. Four geometries of optical applicators with different emitting surfaces were considered: bare fiber, cylindrical, zebra and a hybrid geometry. ![]() A numerical model, based on Monte Carlo method, was implemented to predict the distribution of laser light within the tissue, and the Bio Heat Equation was used to simulate T. The aim is to predict temperature distribution (T), dimensions and shape of thermal lesion produced by the laser light absorption within the tissue, in order to achieve an optimal design of the applicator for LITT. Thermal effects of different applicators for energy deposition in tissue undergoing laser interstitial thermotherapy (LITT) are investigated. ![]()
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