Effect of composition on Bi2O3–SiO2–GeO2 glass properties

Interaction of Nd dopants with broadband emission centers in Bi2O3–B2O3glass: local energy balance and its influence on optical properties

“…The sample was mounted on a temperature-controllable holder with a pinhole for the transmittance measurement. Light from an IR-excluded light source (Asahi Spectra, MAX-303) that penetrated a sample and a monochromator (Japans spectroscopic, Co., Ltd., CT-25CS) was detected with In figure 3(a), the absorption at ~2.8 eV corresponds to the absorption edge of the bismuthate glass [25], and the peak at lower energy around 2.5 eV indicates the absorption of the IEC in the bismuthate glass, as described above [14][15][16][17][18][19][20]. At room temperature, the peak was too weak to be distinguished from the Urback tail [26], indicating that the range of T s represents an initial stage of O-deficient structure formation.…”

“…Bi-doped glasses, are known to be super broadband IR emitters [12,13]: Bi-containing glasses have their own intrinsic emission centers (IECs) for the broadband emission. The origin of IECs has been investigated by many groups [14][15][16][17][18][19][20]. Although IEC absorption and emission properties vary with the fabrication process, glass composition, and dopants, IECs are suspected to originate from simple oxygen (O)-deficient structures, such as Bi metal clusters (Bi agglomeration), Bi [14,18], and BiO [20].…”