Bi-doped fibre lasers and amplifiers emitting in a spectral region of 1.3 μm

A bismuth-doped fibre laser emitting at wavelengths within the second transparency window of silica fibres is fabricated. It is shown that Bi-doped aluminium-free phosphogermanosilicate fibres pumped in the regions of 800 and 1200 nm have the amplification band at 1275—1375 nm.