Wavefront distortion optimized with volume Bragg gratings in photothermorefractive glass.The wavefront characteristics in 2D angular filtering on the basis of two orthogonal transmitting volume Bragg gratings (VBGs) is presented.  The experimental results show that middle-high frequency wavefront distortions are efficiently suppressed with VBGs.  The wavefront power spectrum density shows that the wavefront distribution of the beam in medium and high frequencies is corrected by the VBGs. 
VBGs
Wavefront distortion optimized with volume Bragg gratings in photothermorefractive glass.The wavefront characteristics in 2D angular filtering on the basis of two orthogonal transmitting volume Bragg gratings (VBGs) is presented.  The experimental results show that middle-high frequency wavefront distortions are efficiently suppressed with VBGs.  The wavefront power spectrum density shows that the wavefront distribution of the beam in medium and high frequencies is corrected by the VBGs. 
VBGs
Wavefront distortion optimized with volume Bragg gratings in photothermorefractive glass.The wavefront characteristics in 2D angular filtering on the basis of two orthogonal transmitting volume Bragg gratings (VBGs) is presented.  The experimental results show that middle-high frequency wavefront distortions are efficiently suppressed with VBGs.  The wavefront power spectrum density shows that the wavefront distribution of the beam in medium and high frequencies is corrected by the VBGs. 
VBGs