Walk-off reduction, using an external optical plate and Bessel–Gaussian interaction
Mansouri Masoume, Askarbioki Mohsen, Ghavami Sabouri Saeed†, Khorsandi Alireza‡
       
Reduction of Bessel–Gaussian third-harmonic generation walk-off angle versus the thickness of BK7 plate while it is tilted at 35° during the measurement.