title: Broadband infrared supercontinuum generation in hexagonal-lattice tellurite photonic crystal fiber with dispersion optimized for pumping near 1560  nm: comment.
abstract: I comment on the recent Letter by Klimczak et al. [Opt. Lett.38, 4679 (2013)], in which supercontinuum was generated in a tellurite glass photonic crystal fiber. However, my results show that in the midinfrared 3-6 μm region, the losses of their tellurite glass should be 1-2 orders of magnitude higher than what the authors claimed.
authors: Xian
authors: X
authors: Feng