Green and red up-conversion emissions and thermometric application of Er3+-doped silicate glass

摘要

The green and red up-conversion emissions centred at about 534,549 and 663 nm of wavelength,corresponding respectively to the 2H11/2→ 4I15/2,4S3/2 →4I15/2 and 4F9/2 →4I15/2 transitions of Er3+ ions,have been observed for the Era+-doped silicate glass excited by a 978 nm semiconductor laser beam.Excitation power dependent behaviour of the up-conversion emission intensity indicates that a two-photon absorption up-conversion process is responsible for the green and red up-conversion emissions.The temperature dependence of the green up-conversion emissions is also studied in a temperature range of 296-673 K,which shows that Er3+-doped silicate glass can be used as a sensor in high-temperature measurement.