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3-D analysis of LiNbO3: Ti channel waveguides and directional couplers

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4 Author(s)
Ctyroky, J. ; Institute of Radio Engineering and Electronics, Czechoslovak Academy of Sciences, Prague, Czechoslovakia ; Hofman, M. ; Janta, J. ; Schrofel, J.

An efficient method of calculation of effective refractive indexes and field distribution of guided optical modes in diffused channel waveguides and directional couplers is presented. Refractive index distribution which follows from the theory of two-dimensional anisotropic diffusion is considered. Experiments which relate the refractive index profile with fabrication parameters are described. Then the coupling length of a directional coupler can be calculated from the fabrication parameters. The results correspond well to recently published experimental data.

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Quantum Electronics, IEEE Journal of  (Volume:20 ,  Issue: 4 )