A Precision Optical Calibration Module (POCAM) for IceCube-Gen2 M. Jurkovič, K. Abraham, K. Holzapfel, K. Krings, E. Resconi and J. Veenkamp EPJ Web of Conferences, 116 (2016) 06001 Published online: 11 April 2016 DOI: 10.1051/epjconf/201611606001