Plötner, M.M.PlötnerVries, O. deO. deVriesSchreiber, T.T.SchreiberEberhardt, R.R.EberhardtTünnermann, A.A.Tünnermann2022-03-122022-03-122014https://publica.fraunhofer.de/handle/publica/38765210.1364/ASSL.2014.ATh2A.172-s2.0-84929001621We report on an all-glass low-loss 7:1 single-mode to multi-mode fiber coupler based on CO2 laser glass processing that is tested up to 5.7 kW while only heating up by 8 K/kW.enconference paper