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Hannover 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Hannover musste abgesagt werden! Lesen Sie mehr ...

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Q: Fachverband Quantenoptik und Photonik

Q 39: Posters: Quantum Optics and Photonics III

Q 39.27: Poster

Mittwoch, 11. März 2020, 16:30–18:30, Empore Lichthof

Post-fabrication correction of LiNbO3 modulators via phase-matching temperature tuning — •Fabian Schlue, Marcello Massaro, Matteo Santandrea, Harald Herrmann, and Christine Silberhorn — Universität Paderborn, Warburger Str. 100, 33098 Paderborn

LiNbO3 is commonly used in nowadays telecommunications, because of its high electrooptic (eo) coefficient and the possibly of low loss waveguides, enabling the production of highly integrated and efficient devices. One class of possible devices, making use of the eo effect, are eo modulators. Here, the required driving voltages scale inverse with the used electrode length. Thus, long devices become advantageous in terms of switching speed. However, when fabricating long devices, it becomes increasingly difficult to obtain high homogeneity due to fabrication imperfections. In order to enhance device performance, the necessity of an effective compensation of those imperfections increase. To investigate this a LiNbO3 chip with four cascaded polarization converters in a single device was characterized.
We achieve the compensation by selectively controlling the temperature of the single converter segments. This configuration allows us to systematically tune the overall output by local adjustments of the phase-matching.
Here, we present our results on controlling the array of segments thermally and electrically to optimize the performance of the built device and prove that local control of devices’ properties can be a solution to compensating fabrication imperfections.

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