Infra red fibers
These multimode step-index chalcogenide fibers have a chalcogenide core and chalcogenide cladding of lower refractive index. They will transmit light from 1-6 µm. They are flexible and do not suffer from serious degradation by moisture ingress as with certain other types of fiber designed for this wavelength. Chalcogenide has a glass type structure and fibers can be epoxied into connectors and polished using similar techniques to those employed for silica fibers.
