Response of Various Yb3+-Doped Oxide Glasses to Different Radiation Treatments

Abstract

The radiation effects of electrons and protons on the spectroscopic and optical properties of oxide glasses doped with Yb3+ in various glass systems were investigated to understand the impact of the glass composition on the glass photo-response. Changes in the optical and emission properties were seen after the radiation treatment, and the magnitude of the changes depended on the irradiation source and dose. For all the investigated materials, the absorption coefficients in the 200–550 nm range increase post-irradiation, revealing the formation of defects in the glasses during the irradiation. While the spectroscopic properties of the tellurite glass remain unchanged, a small reduction in the Yb3+ emission intensity was seen after irradiating the phosphate, borosilicate, and germanate glasses, indicating that a reduction of Yb3+ to Yb2+ might occur in these glasses during the radiation treatment. The changes in the optical and spectroscopic properties after proton irradiation are small as they are localized at the surface of the glasses due to the shallow penetration depth of the proton in the glass. Even though the doses are small, the electron irradiation produces larger changes in the optical and spectroscopic properties since the electrons penetrate the entire volume of the glasses. All the changes in the optical and spectroscopic properties of the glasses were successfully reversed after a short heat treatment revealing the reversible nature of the photo-response of the investigated glasses.

Characterization of biodegradable core–clad borosilicate glass fibers with round and rectangular cross‐section

“…Density of the glasses increases with the concentration of Yb 2 O 3 , in agreement with previously reported data 18 . Similarly the refractive index increases due to the adding of heavy lanthanide ions as compared to the much lighter ions in the base glass.…”

“…Figure 3B displays the Yb 3+ absorption coefficient for the characteristic 2 F 5/2 – 2 F 7/2 transition of the Yb 3+ ion. The shape and intensity of the absorption are consistent with previous report on borosilicate glasses doped with Yb 3+ 18 . As can be seen in Figure 3C,D, the emission intensity increases up to 1.0% Yb 2 O 3 before it decreases for 1.25% due to concentration quenching.…”

“…The shape and intensity of the absorption are consistent with previous report on borosilicate glasses doped with Yb 3+ . 18 As can be seen in Figure 3C,D, the emission intensity increases up to 1.0% Yb 2 O 3 before it decreases for 1.25% due to concentration quenching. Similar Yb 3+ threshold concentrations corresponding to 0.5 × 10 21 ions cm −3 have been reported in other borosilicate glasses.…”

“…17 Density of the glasses increases with the concentration of Yb 2 O 3 , in agreement with previously reported data. 18 Similarly the refractive index increases due to the adding TA B L E 1 Selected physical, thermal, optical, and spectroscopic properties of glasses (in blue: fiber core glass, in orange: fiber cladding glass). of heavy lanthanide ions as compared to the much lighter ions in the base glass.…”

Raman and Infrared Spectroscopy of Barium-Gallo Germanate Glasses Containing B2O3/TiO2

“…The above vibrational spectroscopies were successfully applied to examine the local structure of borate [ 4 , 5 ], phosphate [ 6 , 7 ], tellurite [ 8 , 9 ], silicate [ 10 , 11 ], and germanate [ 12 , 13 , 14 , 15 , 16 ] glass-host matrices. Studies in the last decade have shown that basic glass composition can be realized by adding several oxides and/or fluoride additives [ 17 , 18 ].…”