The effect of composition on the emission spectra of Tm 3+ -doped tellurite glasses for an S-band amplifier operating at 1.46 μm

Emission spectrum of Tm3+ doped tellurite glasses for the 3H4–3F4 transition at 1.46 μm has been measured at room temperature and at 5 K. The glass compositions have a major influence on the spectral change, especially in the longer wavelength part of the emission. The effect of different Tm3+ concentrations on the upper and lower level lifetimes and on the emission spectrum has also been reported for designing a broadband multi-channel S-band TDFA.