Technology of filled-aperture coherent beam combining

摘要: In the tiled-aperture coherent beam combining, the low filling factor will reduce the beam combining efficiency. To solve this problem, we proposed a filled-aperture coherent beam combining scheme based on the semi-transparent mirror. We studied the influences of the light intensity difference and wave-front phase error on the efficiency of the beam combination. The results show that it is not difficult to meet the tolerance requirement of light intensity difference and the wave-front phase error requirement in the filled-aperture coherent beam combining. When considering the single factor, if the single beam's intensity is three times larger than the others', the efficiency of the combining can reach 90%. And if the phase error is less than/5, the efficiency of the combining can reach 90.5%. We designed an experimental instrument to verify the feasibility of the filled-aperture coherent beam combining scheme. Experimental …