8 September 2006 Fabrication of periodically poled lithium niobate on x-cut substrates
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Proceedings Volume 6343, Photonics North 2006; 63431L (2006) https://doi.org/10.1117/12.707759
Event: Photonics North 2006, 2006, Quebec City, Canada
Periodically Poled Lithium Niobate (PPLN) components are very promising for the development of active photonic devices. Most of the PPLN devices currently fabricated are based on the use of z-cut wafers. We report on the fabrication of Periodically Poled Lithium Niobate on x-cut substrates by the application of a high electric pulse. The technique is taking advantage of the use of high voltage amplifier to generate the needed high voltage waveform. The shape of the pulse is controlled by feedback to maintain the poling charge constant. This approach makes the total charge independent from the electric field amplitude and the pulse duration. Using this system we show evidence that a long poling pulse improves the domains wall propagation in the forward direction e.g. from Z+ to the Z- side. We also observed an improvement of the quality of the inverted domains when controlling the poling current to a low constant value. High nucleation spike was also critical to obtain uniform inversion and repeatable poling curves for different samples. Using adequate pulse duration, nucleation spike and charges amount, uniform 1 micrometer deep PPLN were successfully fabricated on x-cut substrates.
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Francis Généreux, Francis Généreux, Georges S. Baldenberger, Georges S. Baldenberger, Bruno Bourliaguet, Bruno Bourliaguet, Réal Vallée, Réal Vallée, "Fabrication of periodically poled lithium niobate on x-cut substrates", Proc. SPIE 6343, Photonics North 2006, 63431L (8 September 2006); doi: 10.1117/12.707759; https://doi.org/10.1117/12.707759

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