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Proceedings Paper

Partially athermalized waveguide gratings
Author(s): Muhammad Rizwan Saleem; Seppo Honkanen; Jari Turunen
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Paper Abstract

We investigated high efficiency organic-inorganic hybrid sub-wavelength binary diffraction gratings as partially athermalized waveguides. The performance of the grating is evaluated in terms of low spectral shifts in heating environment. The efficiency was determined to be least effective in temperature environment around room temperature. The spectral characteristics of waveguide remain thermally stable by selecting optical grade polymer materials with high thermal expansion coefficients, subsequently deposited by high index, amorphous TiO2 thin films by atomic layer deposition (ALD) process. The spectral shifts towards longer and shorter wavelengths were investigated in terms of two main parameters, thermal expansion coefficient (TEC) and thermo-optic coefficient (TOC) respectively. Realization of partially athermalized waveguides are described by complete agreement in theoretically calculated and experimentally measured results in the temperature range of 100 °C.

Paper Details

Date Published: 8 May 2012
PDF: 9 pages
Proc. SPIE 8428, Micro-Optics 2012, 842817 (8 May 2012); doi: 10.1117/12.922070
Show Author Affiliations
Muhammad Rizwan Saleem, Univ. of Eastern Finland (Finland)
National Univ. of Sciences and Technology (Pakistan)
Seppo Honkanen, Univ. of Eastern Finland (Finland)
Jari Turunen, Univ. of Eastern Finland (Finland)

Published in SPIE Proceedings Vol. 8428:
Micro-Optics 2012
Hugo Thienpont; Jürgen Mohr; Hans Zappe; Hirochika Nakajima, Editor(s)

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