Investigation of contrast ratio dependence on the angular deviation of the laser beam direction from the optical axis of Pockels cells based on the beta barium borate crystal

G. Sinkevičius; A. Baškys

doi:10.3952/physics.v59i2.4010

G. Sinkevičius
A. Baškys

DOI: https://doi.org/10.3952/physics.v59i2.4010

Keywords: optical properties, electro-optical effects, Q-switching, laser radiation characteristics, optical transmission coefficients, nonlinear optical crystals

Abstract

Dependences of the contrast ratio on the angular deviation of the optical axis with a step of 2 arcmin 28 arcsec have been obtained for Pockels cells based on beta barium borate crystals in the 49 arcmin 34 arcsec range. The investigation was conducted for a single Pockels cell and for a double cell based on optically aligned crystals. The results of investigations can be applied for the calculation of the laser beam focus in order to use a high contrast ratio in high-power laser systems when the light is modulated using Q-switching.