Fluoride glasses are the only material that transmit light from ultraviolet to mid-infrared and can be drawn
into industrial optical fibers. The mechanical and optical properties of new indium fluoride glass fibers
have been investigated. Multimode fiber 190 microns, has very high mechanical strength greater than 100
kpsi and optical loss as low as 45 dB/km between 2 and 4 microns. Unlike chalcogenide glass fibers,
indium fluoride fiber has a wide transmission window from 0.3 to 5.5 microns without any absorption peak.
Indium fluoride glass fibers are the technology of choice for all application requiring transmission up to 5
micron such as infrared contour measure (IRCM) and chemical sensing. Furthermore, Indium fluoride
glasses have low phonon energy and can be heavily doped and co-doped whit rare-earth elements.
Therefore they are very promising candidates for infrared fiber lasers.