| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 736094 | Optics and Lasers in Engineering | 2012 | 6 Pages |
The development of phased-array grating compressor is a crucial issue for the high-energy, ultra-short pulse petawatt-class lasers. Several systems have adopted the tiling-grating approach to meet the size requirements for the compression gratings. Grating tiling need to be precisely phased to ensure a transform-limited focal spot when focusing the high-energy laser pulses onto the target. Monochromatic grating automatic phasing and performance maintaining are experimentally achieved with a far-field CCD camera technique based on a two-tiling system.
► We present the automatic tiled technique based on the far-field focal-spot measurement. ► Relative distance between the focal spot is firstly reduced. ► SPGA algorithm is used to precisely adjust the phase errors. ► Good combined focal spot maintains for hour-long period time.
