1 Introduction Information technology has been playing an ever-increasing role in geoscience.Sphisicated database platforms are essential for geological data storage,analysis and exchange of Big Data(Feblowitz,2013;Zh...1 Introduction Information technology has been playing an ever-increasing role in geoscience.Sphisicated database platforms are essential for geological data storage,analysis and exchange of Big Data(Feblowitz,2013;Zhang et al.,2016;Teng et al.,2016;Tian and Li,2018).The United States has built an information-sharing platform for state-owned scientific data as a national strategy.展开更多
Infrared to green up-conversion emissions centered at the wavelengths of about 524 and 550 nm of the Er3+-Yb3+codoped borosilicate glass are recorded,using a 978 nm semiconductor laser diode(LD)as an excitation source...Infrared to green up-conversion emissions centered at the wavelengths of about 524 and 550 nm of the Er3+-Yb3+codoped borosilicate glass are recorded,using a 978 nm semiconductor laser diode(LD)as an excitation source.The fluorescence intensity ratio(FIR)of the green up-conversion emissions at about 524 and 550 nm in the Er3+-Yb3+codoped borosilicate glass has been studied as a function of temperature over the temperature range of 295-873 K.The maximum sensitivity and the temperature resolution derived from the FIR of the green up-conversion emissions are approximately 0.0038 K-1 and 0.2 K,respectively.It is demonstrated that the prototype optical temperature sensor based on the FIR technique from the green up-conversion emissions in the Er3+-Yb3+codoped borosilicate glass plays a major role in temperature measurement.展开更多
The 0.1 mol% Er3+ and 0―2 mol% Yb3+ codoped Al2O3 powders were prepared by the sol-gel method,and the phase structure,including only two crystalline types of doped Al2O3 phase,γ-(Al,Er,Yb)2O3 and θ-(Al,Er,Yb)2O3,wa...The 0.1 mol% Er3+ and 0―2 mol% Yb3+ codoped Al2O3 powders were prepared by the sol-gel method,and the phase structure,including only two crystalline types of doped Al2O3 phase,γ-(Al,Er,Yb)2O3 and θ-(Al,Er,Yb)2O3,was detected at the sintering temperature of 1000℃. The visible and near infrared emissions properties depended strongly on the Yb3+ codoping,and the corresponding maximal peak intensities centered at about 523,545,660 and 1533 nm were obtained respectively for the 0.1 mol% Er3+ and 0.5 mol% Yb3+ codoped Al2O3 powders,which were composed of θ-(Al,Er,Yb)2O3 and a small amount of γ-(Al,Er,Yb)2O3 phases. The two-photon absorption process was responsible for the visible up-conversion emissions,and the one-photon absorption process was involved in the near infrared emissions of the Er3+-Yb3+ codoped Al2O3 powders.展开更多
基金granted by the National Science&Technology Major Projects of China(Grant No.2016ZX05033).
文摘1 Introduction Information technology has been playing an ever-increasing role in geoscience.Sphisicated database platforms are essential for geological data storage,analysis and exchange of Big Data(Feblowitz,2013;Zhang et al.,2016;Teng et al.,2016;Tian and Li,2018).The United States has built an information-sharing platform for state-owned scientific data as a national strategy.
基金supported by the National Natural Science Foundation of China(Grant No.10804015)China Postdoctoral Science Foundation(Grant No.20090450620)+2 种基金the Scientific Research Foundation for Doctor of Liaoning Province(Grant No.20071095)the Educational Committee Foundation of Liaoning Province(Grant Nos.2008123 and 20060494)the Science and Technique Foundation of Dalian(Grant No.2008J23JH022)
文摘Infrared to green up-conversion emissions centered at the wavelengths of about 524 and 550 nm of the Er3+-Yb3+codoped borosilicate glass are recorded,using a 978 nm semiconductor laser diode(LD)as an excitation source.The fluorescence intensity ratio(FIR)of the green up-conversion emissions at about 524 and 550 nm in the Er3+-Yb3+codoped borosilicate glass has been studied as a function of temperature over the temperature range of 295-873 K.The maximum sensitivity and the temperature resolution derived from the FIR of the green up-conversion emissions are approximately 0.0038 K-1 and 0.2 K,respectively.It is demonstrated that the prototype optical temperature sensor based on the FIR technique from the green up-conversion emissions in the Er3+-Yb3+codoped borosilicate glass plays a major role in temperature measurement.
文摘The 0.1 mol% Er3+ and 0―2 mol% Yb3+ codoped Al2O3 powders were prepared by the sol-gel method,and the phase structure,including only two crystalline types of doped Al2O3 phase,γ-(Al,Er,Yb)2O3 and θ-(Al,Er,Yb)2O3,was detected at the sintering temperature of 1000℃. The visible and near infrared emissions properties depended strongly on the Yb3+ codoping,and the corresponding maximal peak intensities centered at about 523,545,660 and 1533 nm were obtained respectively for the 0.1 mol% Er3+ and 0.5 mol% Yb3+ codoped Al2O3 powders,which were composed of θ-(Al,Er,Yb)2O3 and a small amount of γ-(Al,Er,Yb)2O3 phases. The two-photon absorption process was responsible for the visible up-conversion emissions,and the one-photon absorption process was involved in the near infrared emissions of the Er3+-Yb3+ codoped Al2O3 powders.
