Observation of fluorescence line narrowing, hole burning, and ionhyphen;ion energy transfer in neodymium laser glass

摘要

The existence of hole burning and the degree of homogeneity in the4F3/2rarr;4I11/2laser transition of Nd3+in a silicate glass at 295 K are established by exciting the small thermal population in the4I11/2state with a pulsed Ndthinsp;:thinsp;YAG laser and observing resonant fluorescence line narrowing. Measurements of timehyphen;resolved linehyphen;narrowed4F3/2rarr;4I9/2spectra show that hole filling is slow; cross relaxation rates between ions in spectrally different sites are 104sminus;1for concentrations of les;3 wt.percnt; Nd2O3.