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Title: Thermo-optic properties of epitaxial Sr₀.₆Ba₀.₄Nb₂O₆ waveguides and their application as optical modulator
Authors: Liu, W. C.
Mak, Chee-leung
Wong, Kin-hung
Subjects: Barium
Electrooptical devices
Integrated optics
Light refraction
Organic polymers
Phase transitions
Refractive index
Issue Date: 3-Aug-2009
Publisher: Optical Society of America
Source: Optics express, 3 Aug. 2009, v. 17, no. 16, p. 13677-13684.
Abstract: A prism-coupler technique was introduced to determine the refractive indices and thermo-optic coefficients of epitaxial Sr₀.₆Ba₀.₄Nb₂O₆ (SBN) waveguides, in a temperature range covering the ferroelectric-paraelectric phase transition. A strong enhancement in the TO coefficient is observed near T[sub c]. This strong enhancement is related to the critical change of the polarization. The values of dn[sub e]/dT are significantly larger than dn[sub o]/dT due to the larger quadratic electro-optic coefficient in TM polarization. In TM mode, the refractive index of SBN is increased by 1.3% as the temperature is increased to 160°C. Our results suggest that SBN waveguide is a potential candidate for thermo-optic modulators and switches.
Rights: © 2009 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Type: Journal/Magazine Article
DOI: 10.1364/OE.17.013677
ISSN: 1094-4087
Appears in Collections:AP Journal/Magazine Articles

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