Proton-exchanged planar waveguides have been fabricated on Z-cut and X-cut lithium niobate crystals by using a new proton source formed by a mixture of benzoic and adipic acids. Waveguide index profiles and optical characteristics have been obtained at different values of the adipic-benzoic acid concentration ratio. The samples have been structurally characterized by Raman and infrared (IR) absorption spectroscopy and double-crystal X-ray diffraction. Good quality samples have been fabricated by using 30 mol% ratio dilution, showing very, low scattering levels (<0.1 dB/cm), relatively high electrooptic coefficient (r(33) = 0.88 pm/V), and low relative percentage of interstitial protons (26%). The main factor limiting the waveguide optical properties is the substitutional-interstitial proton ratio, which can be easily controlled to produce good quality waveguides. A demonstration of the repeatability of the exchange process in the acid mixture is also provided.

LiNbO3 optical waveguides formed in a new proton source / Passaro, V. M. N.; Armenise, M. N.; Nesheva, D.; Savatinova, I. T.; Pun, E. Y. B.. - In: JOURNAL OF LIGHTWAVE TECHNOLOGY. - ISSN 0733-8724. - STAMPA. - 20:1(2002), pp. 71-77. [10.1109/50.974820]

LiNbO3 optical waveguides formed in a new proton source

Passaro, V. M. N.;Armenise, M. N.;
2002-01-01

Abstract

Proton-exchanged planar waveguides have been fabricated on Z-cut and X-cut lithium niobate crystals by using a new proton source formed by a mixture of benzoic and adipic acids. Waveguide index profiles and optical characteristics have been obtained at different values of the adipic-benzoic acid concentration ratio. The samples have been structurally characterized by Raman and infrared (IR) absorption spectroscopy and double-crystal X-ray diffraction. Good quality samples have been fabricated by using 30 mol% ratio dilution, showing very, low scattering levels (<0.1 dB/cm), relatively high electrooptic coefficient (r(33) = 0.88 pm/V), and low relative percentage of interstitial protons (26%). The main factor limiting the waveguide optical properties is the substitutional-interstitial proton ratio, which can be easily controlled to produce good quality waveguides. A demonstration of the repeatability of the exchange process in the acid mixture is also provided.
2002
LiNbO3 optical waveguides formed in a new proton source / Passaro, V. M. N.; Armenise, M. N.; Nesheva, D.; Savatinova, I. T.; Pun, E. Y. B.. - In: JOURNAL OF LIGHTWAVE TECHNOLOGY. - ISSN 0733-8724. - STAMPA. - 20:1(2002), pp. 71-77. [10.1109/50.974820]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/612
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