Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/4609
Title: Thermo-optic properties of epitaxial Sr₀.₆Ba₀.₄Nb₂O₆ waveguides and their application as optical modulator
Authors: Liu, WC
Mak, CL 
Wong, KH
Keywords: Barium
Electrooptical devices
Integrated optics
Light refraction
Niobium
Organic polymers
Phase transitions
Polarization
Refractive index
Refractometers
Waveguides
Issue Date: 3-Aug-2009
Publisher: Optical Society of America
Source: Optics express, 3 Aug. 2009, v. 17, no. 16, p. 13677-13684 How to cite?
Journal: Optics express 
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.
URI: http://hdl.handle.net/10397/4609
EISSN: 1094-4087
DOI: 10.1364/OE.17.013677
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: http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-16-13677. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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