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Proceedings Paper

Nonlinear germanium nanocluster doped planar waveguides
Author(s): Karsten Rottwitt; Haiyan Ou; Marie Wandel
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Paper Abstract

In future all-optical networks pure optical signal processing, such as switching, routing and signal regeneration is going to be essential. Each of these tasks puts different constraints to the chosen solution regarding speed, wavelength range of operation, noise and polarization properties etc. However, a large fraction of these functionalities may be obtained by utilizing optical components with a strong nonlinear refractive index [1]. Silica has a very low nonlinear refractive index. Fortunately, silica also has a very low loss. As a consequence of the latter a significant nonlinear phase shift may be accumulated over a large distance i.e. over tens of kilometers of optical fiber. Because of this long length silica is not a viable material when designing compact nonlinear planare lightwave circuits. Recently, nanostructured materials have been proposed as promising candidates for nonlinear waveguides. More specifically glass based materials doped with nanometer sized clusters of for example metals or semiconductors. In this work we demonstrate processing of waveguides with strong confinement of the electrical field achieved using air trenches and processing of glass doped with germanium nanoclusters. We illustrate how the cluster size may be controlled and we show that realization of nonlinear waveguides may be within reach.

Paper Details

Date Published: 30 September 2005
PDF: 8 pages
Proc. SPIE 5971, Photonic Applications in Nonlinear Optics, Nanophotonics, and Microwave Photonics, 59710F (30 September 2005); doi: 10.1117/12.628661
Show Author Affiliations
Karsten Rottwitt, Technical Univ. of Denmark (Denmark)
Haiyan Ou, Technical Univ. of Denmark (Denmark)
Marie Wandel, Technical Univ. of Denmark (Denmark)
OFS Fitel Denmark (Denmark)

Published in SPIE Proceedings Vol. 5971:
Photonic Applications in Nonlinear Optics, Nanophotonics, and Microwave Photonics
Roberto A. Morandotti; Harry E. Ruda; Jianping Yao, Editor(s)

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