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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 16 — Aug. 3, 2009
  • pp: 13677–13684

Thermo-optic properties of epitaxial Sr0.6Ba0.4Nb2O6 waveguides and their application as optical modulator

Wen Chao Liu, Chee Leung Mak, and Kin Hung Wong  »View Author Affiliations

Optics Express, Vol. 17, Issue 16, pp. 13677-13684 (2009)

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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 Tc. This strong enhancement is related to the critical change of the polarization. The values of dne /dT are significantly larger than dno /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.

© 2009 OSA

OCIS Codes
(160.6840) Materials : Thermo-optical materials
(230.7390) Optical devices : Waveguides, planar
(130.4110) Integrated optics : Modulators

ToC Category:
Optical Devices

Original Manuscript: May 20, 2009
Revised Manuscript: June 24, 2009
Manuscript Accepted: July 14, 2009
Published: July 24, 2009

Wen Chao Liu, Chee Leung Mak, and Kin Hung Wong, "Thermo-optic properties of epitaxial Sr0.6Ba0.4Nb2O6 waveguides and their application as optical modulator," Opt. Express 17, 13677-13684 (2009)

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