Polyethylene glycol (PEG) used in the preparation of (Er3+/Yb3+):LiNbO3 waveguides

27th Joint Seminar Development of Materials Science in Research and Education

材料科学;教育

Mikoláová, D.^1 ; Rubeová, K.^1 ; Jake, V.^1 ; Nekvindová, P.^1 ; Nádherný, L.^1 ; Oswald, J.^2

University of Chemistry and Technology, Department of Inorganic Chemistry, Technická 5, Prague 6

166 28, Czech Republic^1

Academy of Sciences of the Czech Republic, Institute of Physics, Cukrovarnická 10, Prague 6

162 00, Czech Republic^2

关键词: Active waveguides;    Emission spectrums;    LiNbO3 wave-guide;    M-line spectroscopy;    Non-hydrolytic sol-gel;    Sapphire substrates;    Watersoluble polymers;    Waveguiding films;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/266/1/012011/pdf
DOI  :  10.1088/1757-899X/266/1/012011

来源: IOP

【 摘 要 】

LiNbO3co-doped with Er3+and Yb3+belongs among the most promising materials in photonics. In the form of thin films on a suitable substrate, it can be used as an active waveguide. Only few articles have been published concerning the deposition of such thin layers using a sol-gel method. Our aim was to test polyethylene glycol (PEG) as a watersoluble polymer in solutions to be deposited by spin-coating on sapphire substrates. Two heat treatment regimes were tested after single layers were deposited. Photoluminescence in a range of 1450-1650 nm was measured and the final films exhibited emission spectra with 6 local maxima. The deposited (Er3+/Yb3+):LiNbO3films were also characterized by m-line spectroscopy. In the NIR range, the films behaved as one-mode waveguides. This nonhydrolytic sol-gel method based on PEG thus represents one of few methods applicable in LiNbO3waveguiding films preparation.