The department has a long history of international cooperations. Our recent international grants:

• HAS - CNR Application of ion implantation to the fabrication  of integrated optical devices (István Bányász, 2010-2012) MDF Laboratory, IFAC, Sesto Fiorentino
• HAS - Estonian Academy of Sciences joint project: Radiation induced effects in pure and doped wide-gap borate crystals (Gábor Corradi, 2010-2012) Institute of Physics, Tartu
• HAS - Bulgarian Academy of Sciences joint project: Growth and spectroscopy of ferroelectric and multiferroic materials (László Kovács - Prof. Marin Gospodinov, 2010-2012) Institute of Solid State Physics, Sofia
• HAS - Polish Academy of Sciences joint project: Growth and spectroscopic investigation of rare earth doped non-linear optical crystals (Földvári István - W. Ryba-Romanowski, 2011-2013). Institute of Low Temperature and Structure Research, Wroclaw.
• Bilateral cooperation with University of Metz, MOPS, IUT St.-Avold, Common research on non-linear crystals and joint Ph.D. programs (Katalin Polgár and Ágnes Péter, 1999-open end)
• Hungarian - German project (P-MÖB/840 and DAAD PPP-Projekt 50445542, respectively) The effect of composition on the light-induced absorption of nonlinear-optical frequency converters of niobate and borate types (Gábor Corradi -Prof. Mirco Imlau, 2010-2011) University of Osnabrück