English: Theoretical loss spectra (attenuation, dB/km) for a typical ZBLAN optical fiber (solid gray line) as function of wavelength (microns). The major components to the attenuation, UV (dotted gray line), IR (dashed gray line) and Rayleigh scattering (dash-dotted gray line) are shown. For reference, the theoretical loss spectra for silica optical fiber (dashed blue line) and that of industry best manufactured ZBLAN (solid red line) are also included. ATTRIBUTION: Cozmuta et al, "Breaking the Silica Ceiling: ZBLAN based opportunities for photonics applications"^[1]