Stuttgart 2012 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 58: Photonik 3

Q 58.9: Talk

Friday, March 16, 2012, 12:45–13:00, V38.01

Poling properties of Ti-diffusion-doped LiNbO₃ — •Christof Eigner, Raimund Ricken, Viktor Quiring, Hubertus Suche, and Christine Silberhorn — Integrated Quantum Optics, Applied Physics, University of Paderborn, 33098 Paderborn, Germany

Guided wave nonlinear optical frequency conversion, which utilizes domain gratings for quasi-phase matching, promises high efficiencies if low loss waveguides and homogeneous domain gratings can be fabricated. Ti-indiffused channels in congruent LiNbO₃ (CLN) are promising waveguides as they provide very low loss and guiding in both, TE- and TM-polarization. However, periodic domain inversion by field assisted poling differs significantly from the poling properties of undoped virgin LiNbO₃. Especially, poling of homogenous short period domain structures, e.g. for the interconversion between short (UV) and long (telecom) wavelengths, is challenging. In this work, the influence of the Ti-doping on the coercive field strength is investigated and a set-up for pulsed field-assisted poling has been tested. Significant increase of the coercive field strength of the Ti-doped compared to the undoped CLN has been observed.