Waynant R W, Oshry S, Fink M
Appl Opt. 1993 Feb 1;32(4):390-2. doi: 10.1364/AO.32.000390.
Infrared transmission losses as low as 8 dB/km at 1060 nm and damage a threshold above 1.3 kJ/cm(2) at 2940 nm have been measured for experimental single-crystal sapphire fibers.