Nonlinear refractive index coefficient for Nd phosphate laser glasses

Intensity-dependent changes in the refractive index of three low-index Nd phosphate laser glasses (LHG-5, LHG-6, EV-1) and one Nd fluorophosphate laser glass were measured at 1064 nm using time-resolved interferometry. The nonlinear refractive index coefficients of these phosphate glasses are all smaller than for Nd silicate laser glass (ED-2).