Universal method to determine the thermo-optic coefficient of optical waveguide layer materials using a dual slab waveguide

Cross, G.H.; Cassidy, D.J.

doi:10.1063/1.2795340

Universal method to determine the thermo-optic coefficient of optical waveguide layer materials using a dual slab waveguide

Cross, G.H.; Cassidy, D.J.

Authors

G.H. Cross

D.J. Cassidy

Abstract

A dual slab waveguide device method for determining the thermo-optic coefficient of waveguide layer materials is demonstrated. Temperature change-induced optical path length imbalance between two single slab waveguide modes provides the primary mechanism for detection. The waveguide mode output field phase change differences are encoded in shifts in the far field interference pattern. To illustrate the method, the thermo-optic coefficients of two In1−xGaxAsyP1−y quaternary alloys, 1.3Q and 1.15Q, are measured at a wavelength of 1.55 µm and at a center temperature of 25.2 °C. Their ratio is in excellent agreement with previous work, in accordance with optical dispersion models.

Citation

Cross, G., & Cassidy, D. (2007). Universal method to determine the thermo-optic coefficient of optical waveguide layer materials using a dual slab waveguide. Applied Physics Letters, 91(14), Article 141914. https://doi.org/10.1063/1.2795340

Journal Article Type	Article
Publication Date	Oct 1, 2007
Deposit Date	Jan 18, 2008
Publicly Available Date	Apr 27, 2011
Journal	Applied Physics Letters
Print ISSN	0003-6951
Electronic ISSN	1077-3118
Publisher	American Institute of Physics
Peer Reviewed	Peer Reviewed
Volume	91
Issue	14
Article Number	141914
DOI	https://doi.org/10.1063/1.2795340

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Copyright Statement
© 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Cross, G. H. and Cassidy, D. J. (2007) 'Universal method to determine the thermo-optic coefficient of optical waveguide layer materials using a dual slab waveguide.', Applied physics letters., 91 (14). p. 141914 and may be found at http://dx.doi.org/10.1063/1.2795340