Damage-threshold increase of pickoff optics using 1 064 nm wavelength laser

Laser pre-treatment is an efficient means to increase damagethresholds of optics. In order to validate the effect of laser pre-treatment on pickoff optics and study its value in engineering application, 1 064 nm YLF laser was used to raster scan pickoff optics with high reflection physics multilayer coating by means of power increase by degrees periodicity. The result was that zero probability damage-thresholds increased 38.8% and 50% probability damage-thresholds increased 7.6%, damage resistance of pickoff optics was evidently enhanced through pre-treatment.