Load-Controlled Polarization of Large-Aperture Optics in High-Power Laser Amplifier

摘要

In the amplifier of the large-aperture laser facility, the laser slab will have a depolarization effect in part areas due to the mounting stress and thermal stress. The depolarization effect will degrade the polarization state of the laser so that it cannot meet the design requirements, thereby affecting the efficiency of the whole facility. At the same time, depolarization will also cause low isolation in the facility and cause unpredictable damage to the optics. Aiming at the problem of depolarization, this article proposes a method to adjust the stress distribution of the laser slab by mounting load, and then adjust the polarization state of the slab, so that the stress distribution of the glass is uniform, and the position of the glass depolarization is controlled as far from the four corners as possible and minimize the influence of depolarization effect on the laser.