SOJKA, L., JAWORKSKI, P., GORA, W., FURNISS, D., SEDDON, A., BENSON, T. M., MERGO, P., SUJECKI, S. and BERES-PAWLIK, E., 2011. Erbium Doped Photonic Crystal Fibre Laser In: Proceedings of the 2011 International Conference on Transparent Optical Networks, 26th - 30th June 2011, Stockholm, Sweden..