<title>Laser conditioning of dielectric oxide mirror coatings at 1064 nm</title>

Abstract

Laser conditioning effects of the dielectric oxide mirror coatings with different designs were investigated. Simple quarter-wave ZrO 2 :Y 2 O 3 /SiO 2 mirrors and half-wave SiO 2 over-coated ZrO 2 :Y 2 O 3 /SiO 2 mirror coatings at 1064nm were fabricated by E-beam evaporation (EBE). The absorbance of the samples before and after laser conditioning was measured by surface thermal lensing (STL) technology and the defects density was detected under Nomarski microscope. The enhancement of the laser damage resistance was found after laser conditioning. The dependence of the laser conditioning on the coating design was also observed and the over-coated sample obtained greatest enhancement, whereas the absorbance of the samples did not change obviously.

Study of nanocrystal TiO2 thin films by thermal annealing

“…Besides, TiO 2 with nano-powders could be synthesized by gas condensation [1]. Furnace annealing, as a convenient and low-cost method, has also been widely used to obtain crystalline materials [6][7][8]. However, using this method seldom work was reported on the properties of nanocrystalline TiO 2 thin films by filtered cathode vacuum arc (FCVA), which is a promising technique to deposit dense thin films with high quality [9,10].…”

Nanosecond laser conditioning of multilayer dielectric gratings for picosecond–petawatt laser systems

“…These factors necessitate the removal of nodular defects. Based on the successful application of laser conditioning in high reflectors and polarizers [31][32][33][34][35][36][37][38] , we first propose removal of nodular defects in MLDGs through nanosecond laser conditioning (NLC). Since the nodular defects are deposited during the preparation of multilayer dielectric films (MLDFs), the appropriate process stage for performing NLC needs to be identified.…”