Absorption, Gain, and Laser Action in Bismuth-Doped Aluminosilicate Optical Fibers

Effect of Si doping on near-infrared emission and energy transfer of Bismuth in silicate glasses

“…T fabricated Bi-doped silica fiber by employing the MCVD method [25,26]. According to their reports, the concentration of Bi active ions in core glass measured by X-ray microanalysis was about 0.02% in most of the fibers [27,28]. But as we know, in most previous researches on luminescence properties, optical application and energy transfer process between Yb 3+ and Bi-related active ions in glass hosts, the concentration of Bi was very high (N0.5 mol%), much higher than that in fiber cores (b0.02 mol%).…”

EXAFS studies of the local structure of bismuth centers in multicomponent silica glass based optical fiber preforms

“…Moreover, till now the fundamental nature of the luminescent centers in this material is controversial (see [4] and references therein), and there are other optical phenomena (e.g. unsaturated loss, excited state absorption, and Bi concentration effects) that occur when the material is exposed to pump light, resonant to the Bi absorption band [5][6][7][8]. As the NIR luminescence is linked to the presence of Bi in the glassy matrix, the determination of the local geometry around this element is of paramount importance for a deeper comprehension of the luminescence process.…”

Enhanced broadband near-IR luminescence and gain spectra of bismuth/erbium co-doped fiber by 830 and 980 nm dual pumping

“…[2][3][4][5] In addition, erbium-doped fiber amplifiers (EDFA) with high gain (several tens of dB) coefficient covering the range 1520-1620 nm have been commercially available. 6,7 Hence, Bi/Er codoped photonic devices are introduced to achieve ultrabroadband amplification covering the whole O-, E-, S-, C-and L-bands.…”