Method for eliminating inter-beam space jitter and optimizing beam quality in coherent beam combination

The invention provides a method for eliminating inter-beam space jitter and optimizing beam quality in coherent beam combination. The method comprises the steps: (1) converging beam combination laserthrough a focusing lens, and determining the focus position; (2) connecting an adjusting frame with a capillary tube, and placing an incident end at the focus position of the focusing lens; (3) accurately adjusting the incident end surface position and angle of the capillary tube; and (4) accurately adjusting the position and angle of the emergent end face of the capillary tube. According to the invention, the method is applied to laser coherent beam combination, can effectively eliminate spatial jitter and beam interference among beams in coherent beam combination so as to improve the outputpointing stability of combined laser and optimize the beam quality, is high in bearing energy and wide in wavelength coverage range, and has the characteristics of clear principle, simple structure, convenience in operation an