Efficient persistent spectral hole burning in Eu3+-doped sulfide glasses was observed with the addition of CsBr or KBr. Holes in these glasses showed high initial growth rates, thermal barrier heights, and low relaxation rates. It was also possible to form independent multiholes on the inhomogeneously broadened absorption spectrum. One-photon absorption of the burning light and corresponding reduction of Eu3+ into Eu2+ via interaction with local conduction (or charge transfer) bands are the main processes for hole burning.