Jayasuriya, D., Petersen, C. R., Furniss, D., Markos, C., Tang, Z., Habib, MD. S., Bang, O., Benson, T. M, Seddon, A. B, "Mid-IR supercontinuum generation in birefringent, low loss, ultra-high numerical aperture Ge-As-Se-Te chalcogenide step-index fiber", Optical Materials Express, 2019