Open AccessInfluence of coating technology and thermal annealing on the optical performance of AR coatings in iodine-filled absorption cells
Author(s) -
Jindřich Oulehla,
Pavel Pokorný,
Jan Hrabina,
Miroslava Holá,
Ondřej Čı́p,
Josef Lazar
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.009361
Subject(s) - materials science , coating , anti reflective coating , optical coating , electron beam physical vapor deposition , absorption (acoustics) , optics , evaporation , composite material , optoelectronics , chemical vapor deposition , physics , thermodynamics
In this contribution, we investigate the properties of antireflective coatings on iodine-filled absorption cell windows. These coatings are subject to high temperatures during the cell production process and are in direct contact with the absorption medium, which influences their optical performance. We tested the thermal resistance of TiO 2 - and Ta 2 O 5 - based coatings produced using conventional electron beam evaporation (e-beam) and ion-assisted deposition (PIAD). We prepared a set of iodine-filled absorption cells that were used to test the coatings' resistance to iodine vapors. We show that the choice of coating materials, coating methods, and a well-chosen bakeout procedure can mitigate any unwanted effects, such as temperature-induced spectral shifts and optical losses inhomogeneities or settling of the absorption medium in the coating.