Er3+-doped 25BaO-(25-x)SiO2-xAl2O3-25B2O3 transparent glasses are prepared with x = 0,12.5 and 25 by a solid-state reaction.The Er-related NIR luminescence intensity,which corresponds to the transition of 4I15/2-4I13/...Er3+-doped 25BaO-(25-x)SiO2-xAl2O3-25B2O3 transparent glasses are prepared with x = 0,12.5 and 25 by a solid-state reaction.The Er-related NIR luminescence intensity,which corresponds to the transition of 4I15/2-4I13/2,is obviously altered with different silicon/aluminum ratios.The Judd-Ofelt parameters of the Er3+ ions are adopted to explain the intensity change in the NIR fluorescence,and the Raman scattering intensity versus the amount of Al and/or Si components are discussed.The spectra of the three samples are quite similar in the peak positions,but different in intensity.The maximal phonon density of state for the samples is calculated from the Raman spectra and is correlated to the NIR luminescence efficiency.展开更多
The 10 at.% Er3+-doped KYb(WO4)2(KEr0.1Yb0.9(WO4)2) laser crystal with dimensions up to 25 mm×15 mm×10 mm was grown by the Kyropoulos method.The crystal structure was identified as β-KEr0.1Yb0.9(WO4)2 by XR...The 10 at.% Er3+-doped KYb(WO4)2(KEr0.1Yb0.9(WO4)2) laser crystal with dimensions up to 25 mm×15 mm×10 mm was grown by the Kyropoulos method.The crystal structure was identified as β-KEr0.1Yb0.9(WO4)2 by XRD analysis.Through TG-DTA curves,the melting point and transition point of the crystal were determined to be 1058 and 1031 °C,respectively.Infrared spectrum and Raman spectrum were measured,and the vibration frequencies of infrared and Raman active modes for the crystal were assigned.The absorption cross ...展开更多
The .Er<sup>3+</sup>-Yb<sup>3+</sup>-doped fiber has a broadened absorption spectrum, which means the pumping sources can work efficiently from 810 to 1100nm. Among them 980nm is the maximum.ab...The .Er<sup>3+</sup>-Yb<sup>3+</sup>-doped fiber has a broadened absorption spectrum, which means the pumping sources can work efficiently from 810 to 1100nm. Among them 980nm is the maximum.absorption （10 dB/km） wavelength. By energy transferring and multiphoton process, the visible and ultraviolet radiation occurs when the Er<sup>3+</sup>-Yb<sup>3+</sup>-doped fiber is pumped by the laser at 980-nm band. Further researches on the mechanism of the fluorescence of Er<sup>3+</sup>-Yb<sup>3+</sup>-doped silica fiber pumped by Ti: A1<sub>2</sub>O<sub>3</sub> tunable laser at 980-nm band are helpful展开更多
A novel Er (3+)-doped (ZnO)(P_2O_5)(B_2O_3) glass with excellent optical properties was prepared. The glasses were proved to have high stability by the investigation of the durability in boiling water. The properties ...A novel Er (3+)-doped (ZnO)(P_2O_5)(B_2O_3) glass with excellent optical properties was prepared. The glasses were proved to have high stability by the investigation of the durability in boiling water. The properties of their spectra at about 1.5 μm change a lot with the concentrations of both Er (3+) and B_2O_3. Compared with Er (3+)-doped into the borate glass and the zinc phosphate glass,the glass prepared in our laboratory shows a larger quenching concentration and a much broader emission band at 1.54 μm.展开更多
This paper reports the simultaneous emissions around 1.53, 1.80, 2.10, 2.70 and 3.00 gm in Er3＋-Ho3＋ - Nd3＋/Tm3＋-codoped telluride glasses upon excitation of a conventional 808 nm laser diode. Both emission bands ...This paper reports the simultaneous emissions around 1.53, 1.80, 2.10, 2.70 and 3.00 gm in Er3＋-Ho3＋ - Nd3＋/Tm3＋-codoped telluride glasses upon excitation of a conventional 808 nm laser diode. Both emission bands of 1.53 and 2.70 gm were assigned to the transitions of 4113/2 -4115/2, 4111/2 -4113/2 of Er＋＋ ions, respectively, the emission near 1.80 gm was assigned to the transition ＊F4 -4H6 of Tm3＋ ions, and the emissions at 2.10 and 3.00 μm arose from the transitions of 5I7 -518, 5I6 -5I7 of Ho3＋ ions. The materials are promising for ultra-broad band amplified spontaneous emission optical sources at near and middle infrared region.展开更多
We have performed time-resolved degenerate four-wave mixing (DFWM) experiments in 75Nb2O5-20TeO2-5ZnO glasses doped by Er2O3 at different excitation intensities and lattice temperatures. DFWM signal exhibits three pea...We have performed time-resolved degenerate four-wave mixing (DFWM) experiments in 75Nb2O5-20TeO2-5ZnO glasses doped by Er2O3 at different excitation intensities and lattice temperatures. DFWM signal exhibits three peaks at high excitation intensities, where a main peak appears at zero time delay and two rather weak side peaks locate symmetrically at the negative and positive time delay, respectively. The main peak is attributed to local-field effect and two side peaks are attributed to Coulomb interaction (CI).展开更多
基金Project supported by the Natural Science Foundation of Tianjin (Grant Nos. 09JCYBJC01400 and 11JCYBJC00300)the Natural Science Foundation of the Tianjin Education Committee (Grant No. 20071207)Tianjin Key Subject for Materials Physics and Chemistry
文摘Er3+-doped 25BaO-(25-x)SiO2-xAl2O3-25B2O3 transparent glasses are prepared with x = 0,12.5 and 25 by a solid-state reaction.The Er-related NIR luminescence intensity,which corresponds to the transition of 4I15/2-4I13/2,is obviously altered with different silicon/aluminum ratios.The Judd-Ofelt parameters of the Er3+ ions are adopted to explain the intensity change in the NIR fluorescence,and the Raman scattering intensity versus the amount of Al and/or Si components are discussed.The spectra of the three samples are quite similar in the peak positions,but different in intensity.The maximal phonon density of state for the samples is calculated from the Raman spectra and is correlated to the NIR luminescence efficiency.
基金supported by Jilin Provincial Education Department (2009JYT15)Jilin Provincial Science and Technology Department (20090709)Changchun Science and Technology Bureau (2009110)
文摘The 10 at.% Er3+-doped KYb(WO4)2(KEr0.1Yb0.9(WO4)2) laser crystal with dimensions up to 25 mm×15 mm×10 mm was grown by the Kyropoulos method.The crystal structure was identified as β-KEr0.1Yb0.9(WO4)2 by XRD analysis.Through TG-DTA curves,the melting point and transition point of the crystal were determined to be 1058 and 1031 °C,respectively.Infrared spectrum and Raman spectrum were measured,and the vibration frequencies of infrared and Raman active modes for the crystal were assigned.The absorption cross ...
文摘The .Er<sup>3+</sup>-Yb<sup>3+</sup>-doped fiber has a broadened absorption spectrum, which means the pumping sources can work efficiently from 810 to 1100nm. Among them 980nm is the maximum.absorption （10 dB/km） wavelength. By energy transferring and multiphoton process, the visible and ultraviolet radiation occurs when the Er<sup>3+</sup>-Yb<sup>3+</sup>-doped fiber is pumped by the laser at 980-nm band. Further researches on the mechanism of the fluorescence of Er<sup>3+</sup>-Yb<sup>3+</sup>-doped silica fiber pumped by Ti: A1<sub>2</sub>O<sub>3</sub> tunable laser at 980-nm band are helpful
文摘A novel Er (3+)-doped (ZnO)(P_2O_5)(B_2O_3) glass with excellent optical properties was prepared. The glasses were proved to have high stability by the investigation of the durability in boiling water. The properties of their spectra at about 1.5 μm change a lot with the concentrations of both Er (3+) and B_2O_3. Compared with Er (3+)-doped into the borate glass and the zinc phosphate glass,the glass prepared in our laboratory shows a larger quenching concentration and a much broader emission band at 1.54 μm.
文摘This paper reports the simultaneous emissions around 1.53, 1.80, 2.10, 2.70 and 3.00 gm in Er3＋-Ho3＋ - Nd3＋/Tm3＋-codoped telluride glasses upon excitation of a conventional 808 nm laser diode. Both emission bands of 1.53 and 2.70 gm were assigned to the transitions of 4113/2 -4115/2, 4111/2 -4113/2 of Er＋＋ ions, respectively, the emission near 1.80 gm was assigned to the transition ＊F4 -4H6 of Tm3＋ ions, and the emissions at 2.10 and 3.00 μm arose from the transitions of 5I7 -518, 5I6 -5I7 of Ho3＋ ions. The materials are promising for ultra-broad band amplified spontaneous emission optical sources at near and middle infrared region.
基金This work was suPPorted by Shanghai Priority Academic DisciPline,the National Natural Science Foundation of China(No.10234030 and 10074015),the National Key Project for Basic Research(No.1999075204),the Project Sponsored by Shangliai Science and Tech
文摘We have performed time-resolved degenerate four-wave mixing (DFWM) experiments in 75Nb2O5-20TeO2-5ZnO glasses doped by Er2O3 at different excitation intensities and lattice temperatures. DFWM signal exhibits three peaks at high excitation intensities, where a main peak appears at zero time delay and two rather weak side peaks locate symmetrically at the negative and positive time delay, respectively. The main peak is attributed to local-field effect and two side peaks are attributed to Coulomb interaction (CI).
