The near IR emission spectra of Tm/Er-codoped GeS2-In2S3-based chalcohalide glasses are studied with an 808 nm laser as excitation source. A broad emission with a full-width at half-maximum of similar to 170 nm is recorded in a 0.5Tm(2)S(3)-0.1Er(2)S(3)-codoped 70GeS(2)-20In(2)S(3)-10CsBr (in mol%) glass. The luminescence mechanisms are discussed with different CsI concentration, different halogen atoms, and different In content. These results suggest that both halogen (X) atoms and [InSxX4-x] structural units can enhance the emission intensity located at 1460 nm.