Walk-off reduction, using an external optical plate and Bessel–Gaussian interaction
Mansouri Masoume, Askarbioki Mohsen, Ghavami Sabouri Saeed†, Khorsandi Alireza‡
       
Measured Bessel–Gaussian third-harmonic generation walk-off angle performed by rotating the BK7 plate up to 35° around the Bessel–Gaussian beam. The BK7 thickness is kept at 20 mm during the measurement.