Bismuth-doped Silica Fiber Amplifier

Ultra-Broadband Optical Transmission using Bi/Er Codoped Glass Fiber: Key Design Issue and a Survey

“…Some recent studies suggested ultra broadband gain across O, E and S bands, covering 1100-1500 nm, of the telecommunications window using Bi-doped silica glasses [3,8]. Bidoped silica fibers were also reported with luminescence in the region of 1050 to 1300 nm in [2].…”

“…These Bi-doped fibers and BiEDFs (kind of Bi/Er codoped fibers) are developed separately for O, E and S bands, and for C and L ands, respectively. Reference [3] suggested that Bismuth-doped silica glass (BiSG) is a new material that emits a broadband fluorescence peak at around 1250 nm with a bandwidth over 300 nm.…”

“…Until recently, only rare earth-doped (especially, erbium-doped) optical fibers have been used in development of fiber lasers and optical amplifiers. At present, rare earth-doped fiber amplifiers with wavelengths in the near-IR region, 1530-1610 nm, are widely used for DWDM transmission system [1][2][3][4]. …”