Influence of coating technology and thermal annealing on the optical performance of AR coatings in iodine-filled absorption cells

0508144 - ÚPT 2020 RIV US eng J - Journal Article
Oulehla, Jindřich - Pokorný, Pavel - Hrabina, Jan - Holá, Miroslava - Číp, Ondřej - Lazar, Josef
Influence of coating technology and thermal annealing on the optical performance of AR coatings in iodine-filled absorption cells.
Optics Express. Roč. 27, č. 7 (2019), s. 9361-9371. ISSN 1094-4087
R&D Projects: GA ČR GA15-18430S; GA MŠMT(CZ) LO1212; GA MŠMT ED0017/01/01
Institutional support: RVO:68081731
Keywords : absolute frequency-measurement * standard
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 3.669, year: 2019
Method of publishing: Open access
https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-27-7-9361&id=407478

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 TiO2- and Ta2O5-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.
Permanent Link: http://hdl.handle.net/11104/0299128