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Proceedings Paper

Modeling and numerical simulation of electro-optic devices on LiNbO3
Author(s): Horst Wulf; Edgar I. Voges
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Paper Abstract

Practical applications of integrated electo-optic devices such as modulators and switches require an optimum design of the optical waveguide and electrode configuration. Due to the anisotropy of LiNbO3 not only the amplitude, phase and frequency of the propagated optical wave, but also its polarization has to be taken into account for an accurate prediction of the device performance. Starting with the physical and geometrical device configuration, a 3-dimensional refractive index profile of the entire device structure can be derived from a technologic data set or from refractive index measurements. In order to reduce the CPU-time consumption of the propagated lightwave simulation (BPM), the 3D-profile is usually reduced to two dimensions by effective index calculations. Electro-optic index changes, caused by applying switching or modulation voltages to the device electrodes, are calculated including dielectric buffer layers. This is achieved by computing the overlap between the electrical and the optical field, which is obtained from the effective index method. The numerical simulation of a propagating lightwave through an electro-optic device on anisotropic substrate requires the solution of the wave equations. BPM-simulations include calculations of axial variations of the index distribution as well as absorption and radiation losses. Taking into account the behaviour of anisotropic substrates, BPM-simulations of polarization splitters and polarization independent devices allow access to a wide area of practical interesting applications. Various examples of BPM-simulations of complex electro-optic devices will be presented together with CADtechniques utilizing a VLSI-editor adapted to integrated optic devices.

Paper Details

Date Published: 1 August 1990
PDF: 11 pages
Proc. SPIE 1274, Electro-Optic and Magneto-Optic Materials II, (1 August 1990); doi: 10.1117/12.20480
Show Author Affiliations
Horst Wulf, Univ. Dortmund (Germany)
Edgar I. Voges, Univ. Dortmund (Germany)

Published in SPIE Proceedings Vol. 1274:
Electro-Optic and Magneto-Optic Materials II
Hans Dammann, Editor(s)

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