Formation of phase soliton complexes in an optically injected semiconductor laser Francois Gustave, Cristina Rimoldi, Pierre Walczak, Lorenzo Columbo, Massimo Brambilla, Franco Prati, Giovanna Tissoni and Stéphane Barland Eur. Phys. J. D, 71 6 (2017) 154 Published online: 15 June 2017 DOI: 10.1140/epjd/e2017-80104-0