Efficient and thermally enhanced frequency upconversion in Yb3+-sensitized Tm3+-doped silica-on-silicon buried waveguides excited at 1.064 mu m

Vermelho, M.V.D., de Araujo, M.T., Gouveia, E.A., Gouveia-Neto, A.S. and Aitchison, J. (2001) Efficient and thermally enhanced frequency upconversion in Yb3+-sensitized Tm3+-doped silica-on-silicon buried waveguides excited at 1.064 mu m. Optical Materials, 17, pp. 419-423.

Abstract

Efficient and thermally enhanced frequency upconversion of cw infrared radiation at 1.064 mum into blue (480 nm), red (660 nm) and near-infrared (800 nm) light in integrated Tm3+/Nb3+-codoped phosphosilicate silica-on-silicon buried waveguides is reported. Thermally induced frequency upconversion enhancement is observed for the first time in Tm3+/Yb3+-codoped systems excited off-resonance at 1.064 mum. A times seven thermally induced upconversion efficiency enhancement was obtained when the waveguide's temperature was varied in the 20-120 degreesC range. The thermal effect is believed to be associated with a temperature dependent effective absorption cross-section for the Yb3+-sensitizer, which depends upon the phonon occupation number in the host matrix .

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: UNSPECIFIED
• Authors: Vermelho, M.V.D., de Araujo, M.T., Gouveia, E.A., Gouveia-Neto, A.S., and Aitchison, J.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Optical Materials