Integrated optics prototype beam combiner for long baseline interferometry in the L and M bands J. Tepper, L. Labadie, R. Diener, S. Minardi, J.-U. Pott, R. Thomson and S. Nolte A&A, 602 (2017) A66 Published online: 14 June 2017 DOI: 10.1051/0004-6361/201630138