The PbSe quantum dot(QD) doped glass is fabricated successfully by using melting method and two-step heat treatment.The X-ray diffractometer and transmission electron microscopy measurements indicate that the average size of PbSe QDs in the glass reaches 5-6 nm with the heat temperature of 550 ℃ when the heat treatment time is about 1-10 h.The size of QDs generated in the glass increases with τ during 3-8 h.Near-infrared photoluminescence(PL) spectra show that the QD doped glass has enhanced PL ...