Proceedings of the 41th European Conference on Optical Communication (ECOC 2015), 27 September-1 October 2015, Valencia, Spain, 1-3 STARTPAGE=1;ENDPAGE=3;TITLE=Proceedings of the 41th European Conference on Optical Communication (ECOC 2015), 27 September-1 October 2015, Valencia, Spain ECOC 2015 41ST EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION