| Semiconductor quantum dots have attracted much attention because of their many unique electrical and optical properties compared with the corresponding bulk materials,especially QDs of IV–VI materials such as PbSe.They have relatively large Bohr radius,high photo luminescence quantum yield.In addition,the fiber has been widely used in optical fiber communication,optical fiber amplifier and so on.Therefore,this is a meaningful research work for filling the quantum dot material to hollow core fiber.In this paper,three-level system-based rate equation and power transfer equation were used to solve the temperature dependent emission spectral properties for 3.3 nm PbSe quantum dot doped liquid core fiber under different fiber length and doping concentration,considering the effect of the temperature on the parameters.Found that in the case of different fiber length,with the temperature increasing,the spectral peak position shifts to the red with a similar red shift rate,the spectral peak intensity decreases which has a larger decline rate with longer fiber.When the fiber diameter is not at the same time,with the increasing of temperature,spectral peak position is similar to the rate of shift decreased the peak intensity of the spectrum,the larger diameter of fiber,the attenuation rate of the larger intensity with temperature.In the case of different doping concentration,with the temperature increasing,the spectral peak position shifts to the red with a similar red shift rate,and the spectral peak intensity decreases with a similar decline rate.This study provides a certain theoretical basis for the research of quantum dots optical fiber temperature sensor. |
