Artigo
Fabrication of Yb3+/Er3+ codoped Bi2O3-WO3-TeO2 pedestal type waveguide for optical amplifiers
Registro en:
Optical Materials. Amsterdam: Elsevier Science Bv, v. 38, p. 198-203, 2014.
0925-3467
10.1016/j.optmat.2014.10.027
WOS:000346228800034
Autor
Del Cacho, V. D.
Silva, D. M. da
Assumpcao, T. A. A. de
Kassab, Luciana Reyes Pires [UNESP]
Alayo, M. I.
Melo, E. G.
Resumen
We report, for the first time to our knowledge, experimental results on pedestal waveguides produced with Yb3+/Er3+ codoped Bi2O3-WO3-TeO2 thin films deposited by RF Sputtering for photonic applications. Thin films were deposited using Ar/O-2 plasma at 5 mTorr pressure and RF power of 40 W on substrates of silicon wafers. The definition of the pedestal waveguide structure was made using conventional optical lithography followed by plasma etching. Propagation losses around 2.0 dB/cm and 2.5 dB/cm were obtained at 633 and 1050 nm, respectively, for waveguides in the 20-100 mu m width range. Single-mode propagation was measured for waveguides width up to 10 mu m and 12 mu m, at 633 nm and 1050 nm, respectively; for larger waveguides widths multi-mode propagation was obtained. Internal gain of 5.6 dB at 1530 nm, under 980 nm excitation, was measured for 1.5 cm waveguide length (similar to 3.7 dB/cm). The present results show the possibility of using Yb3+/Er3+ codoped Bi2O3-WO3-TeO2 pedestal waveguide for optical amplifiers. (C) 2014 Elsevier B.V. All rights reserved. Escola Politecn USP, Dept Engn Sistemas Eletron, Sao Paulo, Brazil CEETEPS UNESP, Fac Tecnol Sao Paulo FATEC SP, Lab Tecnol Mat Foton & Optoeletron, Sao Paulo, Brazil CEETEPS UNESP, Fac Tecnol Sao Paulo FATEC SP, Lab Tecnol Mat Foton & Optoeletron, Sao Paulo, Brazil