Optical performance of antireflective coatings in iodine-filled absorption cells

0551137 - ÚPT 2022 RIV SK eng C - Conference Paper (international conference)
Hrabina, Jan - Oulehla, Jindřich - Pokorný, Pavel - Holá, Miroslava - Lazar, Josef - Číp, Ondřej
Optical performance of antireflective coatings in iodine-filled absorption cells.
Proceedings of ADEPT - ADEPT 2021. Žilina: University of Žilina, 2021 - (Jandura, D.; Maniaková, P.; Lettrichová, I.; Kováč, jr., J.), s. 203-206. ISBN 978-80-554-1806-3.
[9th International Conference on Advances in Electronic and Photonic Technologies - ADEPT 2021. Podbanské (SK), 20.09.2021-23.09.2021]
R&D Projects: GA TA ČR(CZ) TN01000008; GA MŠMT ED0017/01/01; GA MŠMT(CZ) LO1212; GA MŠMT(CZ) EF16_026/0008460
Institutional support: RVO:68081731
Keywords : optical coatings * PIAD * e-beam evaporation * thin films * iodine absorption cells * laser spectroscopy
OECD category: Optics (including laser optics and quantum optics)

We investigate the optical performance of antireflective coatings which are subject to high temperatures and the presence of iodine gas in order to determine the most suitable technological process for iodine-filled absorption cell production. There are two unwanted effects, which need to be avoided or mitigated. One is the settling of iodine gas in the structure of the coating, which reduces the trasmittance of the cell windows, the other is the thermally induced spectral shift, which limits the effect of the antireflective coating. We investigate the thermal resistence of TiO2 and Ta2O5 based coatings produced by electron beam evaporation (e-beam) and plasma ion assisted deposition (PIAD). We prepared sets of quartz samples which were subject to a range of temperatures and the presence of iodine gas. We show that the choice of the coating technique and annealing procedure can mitigate the aforementioned effects.
Permanent Link: http://hdl.handle.net/11104/0326581