Simulation of electro-optic modulator based on optical waveguide formed by residual thermal stress-induced on Bi4Ge3O12 substrate by Si3N4 thin film

S. S. Sato, R. E. Caetano, M. A. R. Franco, J. C. Santos


This paper presents a study on the performance of electro-optic (EO) modulators consisting of optical waveguides induced by residual thermal stress produced by silicon nitride (Si3N4) film deposited on bismuth germanate (Bi4Ge3O12) substrate. Methodologies developed in previous works are used to analyze the performance related to electro-optics modulators. The analyses were performed by a full vector finite element method (FEM) based program, capable of multiphysics simulations, including evaluation of optical propagation characteristics of residual thermal stress-induced waveguides and main electro-optic parameters of EO modulators, considering different geometrical designs. The presented performance results (in terms of sizes of modes, effective refractive indices, characteristic impedances and electro-optic modulation depth) indicate the viability of EO modulators fabrication on cubic substrates with unusual directions of light propagation and electric field application.

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J. C. J. de Almeida, J. C. Santos, J. Rubini Jr., O. V. de Avilez Filho; A New Conception Of Signal Processor For A Pockels Ac High Voltage Sensor. Proceedings on 6th WSEAS INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING, COMPUTATIONAL GEOMETRY & ARTIFICIAL VISION; Atenas, WSEAS, 2006. v. 1. p. 1-7;

J. C. Santos, J. C. J. de Almeida, L. P. C. da Silva; WLI High Voltage Optical Fiber Sensor Systems with Compensation for Optical Power Fluctuations; In: THIRD EUROPEAN WORKSHOP ON OPTICAL FIBRE SENSORS -EWOFS 2007, 2007, Napoles. Proceedings Third European Workshop on Optical fibre Sensors. Bellingham, Washington, USA, SPIE -The International Society of Photo-Optical Instrumentation Engineers, 2007. v. 6619. p. 661928-1-661928-4

J. C. Santos, J. C. J. de Almeida, L. P. C. da Silva; White Light Interferometry High Voltage Optical Fiber Sensor Systems with Compensation for Optical Power Fluctuations; In: Yasin Moh. (Org.). Optical Fibers/Book 1. 1 ed. Rijeka, Croatia: Intech Open Access publisher. 2012.v. 1, p. 491-518;

S. S. Sato, J. C. Santos, M. A. R. Franco; Modeling Residual Thermal Stress-Induced Integrated Optical Bi12GeO20 Substrate for Electro-Optic Modulation Application; presented at IMOC 2009 - INTERNATIONAL MICROWAVE AND OPTOELECTRONICS CONFERENCE; Belém, 2009;

S. S. Sato, J. C. Santos, M. A. R. Franco; Residual Thermal Stress-Induced Integrated Optical Waveguides on Bi12GeO20 Substrate; presented at EWOFS (Fourth European Workshop on Optical Fibre Sensors) – 2010; Porto; Portugal;

L. S. Zambom; Deposição de nitreto de silício por LPCVD; São Paulo; Epusp, 1995;

A. L. Siarkowski; Implementação de Sensores Ópticos Integrados para Aplicações em Análises Químicas e Ambientais; São Paulo; Epusp, 2007;

S. Fu, H. Ozoe; Growth of Bi12GeO20 Crystal Rods and Fibers by the Improved Floating Zone Method; Journal of Materials Science, Vol. 34, pp. 371-377, 1999;

K Saitoh, M. Koshiba, Y. Tsuji; Stress Analysis Method for Elastically Anisotropic Material based Optical Waveguides and Its Application to Strain-Induced Optical Waveguides, IEEE Journal of Lightwave Technology, Vol. 17, No. 2, pp 255- 259, 1999;

A. Yariv, P. Yeh; Optical Waves in Crystals, 1st ed., Wiley & Sons, Inc. New York, 1984; Accessed on: May 15, 2012.

M. A. R. Franco, A. Passaro, N. M. Abe, J. M. Machado, and F. Sircilli; A Finite Element Analysis of a Ti:LiNbO3 Traveling-Wave Electro-optic Modulator with Floating Electrodes; Telecomunicações, Vol. 07, No 02, PP. 29-32, 2000;


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