The propagation losses are evaluated for the first time in curved integrated (buried) optical waveguides (WGs) based on oxidized porous silicon. In the visible red range, the losses decrease from 20 to 5 dB per 90 degrees bending (for about 0.4 dB/cm loss in the straight WG) when the WG curvature radius increases from 125 to 2500 mu m. The main component of the total bending losses in WGs is related to the coupling loss on the passage from straight to curved WG parts. Additional losses are introduced by the regions of incompletely oxidized porous silicon on the walls of curved WGs.
Propagation losses in curved buried optical waveguides based on oxidized porous silicon / Bondarenko, V; Klyshko, A; Balucani, Marco; Ferrari, A.. - In: TECHNICAL PHYSICS LETTERS. - ISSN 1063-7850. - STAMPA. - 31:(2005), pp. 225-227. [10.1134/1.1894439]
Propagation losses in curved buried optical waveguides based on oxidized porous silicon
BALUCANI, Marco;
2005
Abstract
The propagation losses are evaluated for the first time in curved integrated (buried) optical waveguides (WGs) based on oxidized porous silicon. In the visible red range, the losses decrease from 20 to 5 dB per 90 degrees bending (for about 0.4 dB/cm loss in the straight WG) when the WG curvature radius increases from 125 to 2500 mu m. The main component of the total bending losses in WGs is related to the coupling loss on the passage from straight to curved WG parts. Additional losses are introduced by the regions of incompletely oxidized porous silicon on the walls of curved WGs.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
