In this paper, we used a coherent beam combination to design a 50 kW high power laser beam for energy applications.Because of the strong environmental Coaxial/TV Cables turbulence, degrade the coherent beam combination advantages, low turbulence level is considered.Combining elements are composed of 19 polarized single mode 3 kW high power fiber lasers where are arranged in the co- two centric hexagonal rings.
Each of the fiber a lasers has a collimator with a 30 mm beam spot size output.We extended the transmitting range to z=10 km Stainless Steel Cleaner and the improved filling factor up to f=0.91.
Therefore, power loss at the side lobes are minimized and resulted in the rise of combination efficiency to 88%, which is the highest published result.The central spot size radius on the target is R=5.9 cm, where indicate 0.
45 kW/cm2 power density.Also, the effect of Phase errors of the combining elements at the far- field, which cause the ray intensity scattering from the center spot to the side lobes is investigated.