A study on the output beam profile of a ring resonator type diplexer Y. Oda, S. Sugawara, K. Atsumi, T. Yamaguchi, M. Saigusa and K. Sakamoto EPJ Web of Conferences, 32 (2012) 04019 Published online: 06 September 2012 DOI: 10.1051/epjconf/20123204019