CdS and CdSe semiconductor nanocrystal doped glasses and their applicationin fiber-optic sensors

We propose a temperature fiber sensor based on CdS- and CdSe-nanocrystal-do ped phosphate glasses. These glasses demonstrate a reversible temperature-i nduced absorption edge shift at temperatures less than the annealing temper ature of the glass (< 370 <degrees>C). In order to eradicate the effects of variable signal losses in intensity-dependent sensor, a dual-wavelength de tection scheme was proposed. A sensor, tested in the temperature range of - 20 to +120 degreesC, is shown to exhibit a linear response to temperature v ariations.