Angle amplifier in 2D beam scanning system based on peristrophic multiplexed volume Bragg gratings

The induction of peristrophic multiplexing reduces the performance difference in one bulk of grating whereas no need to deliberately optimize the fabrication process. It is revealed that a discrete 2D angle deflection range of ±30° is obtained and the relative diffraction efficiency of all the grating channels reaches more than 55% with a Root-Mean-Square deviation of less than 3.4% in the same grating.

The deviation of the Bragg incident and exit angle from the expected values is less than 0.07°. It is believed that the proposed 2D angle amplifier has the potential to realize high-performance and large-angle beam steering in high-power laser beam scanning systems.