Power in bucket enhancement in tiled-aperture coherent beam combining through inducing spatial chirp

To address the aforementioned issue, spatial chirp is employed in this paper to fill the gaps and further enhance PIB. With two sub-beams, both simulations and experiments indicate that PIB can be enhanced by about 1.8 times with spatial chirp when the gap-beam width ratio is 0.2.

Furthermore, a PIB enhancement ratio of 1.8 is achieved when four sub-beams with a gap-beam width ratio of 0.05 in the simulation. In short, the spatial-chirp-assisted Ta-CBC method holds the potential in enhancing focal laser intensity during achieving tens to hundreds of petawatt (PW) lasers.