Migration of guided and leaky modes in rotated optical axis birefringent waveguides

Antonella D'Orazio; Marco De Sario; G. Ficarella; Diego Marchese; Vincenzo Petruzzelli; Francesco Prudenzano

doi:10.1117/12.201984

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22 February 1995 Migration of guided and leaky modes in rotated optical axis birefringent waveguides

Antonella D'Orazio, Marco De Sario, G. Ficarella, Diego Marchese, Vincenzo Petruzzelli, Francesco Prudenzano

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Proceedings Volume 2449, Fiber Optic Network Components; (1995) https://doi.org/10.1117/12.201984
Event: Advanced Networks and Services, 1995, Amsterdam, Netherlands

Abstract

The guided and leaky mode propagation in a multilayered c-rotated anisotropic waveguide having an equatorial dielectric tensor configuration is examined. In particular, the electromagnetic behavior of titanium diffused lithium niobate (Ti:LiNbO₃) and proton exchanged lithium niobate (PE:LiNbO₃) waveguides is compared. The dependence of modal characteristics on the equatorial angle (gamma) is shown and the effects of different metal layers are investigated. The transition from leaky to guided modes occurs only for the PE:LiNbO₃ waveguide while the modes do not change their nature for the Ti:LiNbO₃ waveguide. The number of guided modes, for the PE:LiNbO₃ waveguide, increases by increasing the angle (gamma) . The first guided mode, having the real part of the refractive effective index n_r equals 2.2701, appears at (gamma) equals 25 degree(s), while, for (gamma) > 73 degree(s) nine different guided modes exist.

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Antonella D'Orazio, Marco De Sario, G. Ficarella, Diego Marchese, Vincenzo Petruzzelli, and Francesco Prudenzano "Migration of guided and leaky modes in rotated optical axis birefringent waveguides", Proc. SPIE 2449, Fiber Optic Network Components, (22 February 1995); https://doi.org/10.1117/12.201984

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