This paper introduces our recent research on the coherently combined fiber laser based on spatial structure internal phase locking including the principle of spatial structure internal phase locking, and the experiment of 7-channel fiber laser array carried out to experimentally verify the feasibility of this technique. The detailed results indicate that when the phase noises in the laser channels are locked, the external phase differences an be compensated together, and the laser array can be locked with a same phase wavefront. In addition, the researches on the CBC of target in the loop (TIL) technique and constructing the light fields are introduced as well. In the experiment, the control bandwidth of the CBC system of TIL could be improved effectively, and the orbital angular momentum beams could be generated in the far field, the topological charge could be changed from -1 to +1.