A new type ultraflattened dispersion photonic crystal fiber with low confinement lossX. L. Tan, Y. F. Geng, Y. P. Zhang, H. Y. Zhang, P. Wang and J. Q. YaoEur. Phys. J. Appl. Phys., 40 2 (2007) 175-179DOI: https://doi.org/10.1051/epjap:2007134