Fourth order cascaded Raman shift in As38Se62 chalcogenide suspended core fiber pumped at 1.995 μm

Fourth order cascaded Raman wavelength shift is demonstrated in As
₃
gSeg
₂
suspended core fiber using 1995 nm nanosecond source. The measured Raman gain coefficient is-2×10
^-11
m/W at 1995 nm. The Raman peaks are reproduced by numerical simulations.