Lauder, R.D.T., Carter, J.N., Hanna, D.C., Tropper, A.C., Pask, H.M., Davey, S.T. and Szebesta, D.
Efficient amplification in the first telecommunications window
Journal of Non-Crystalline Solids, 161, . (doi:10.1016/0022-3093(93)90716-B).
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Thulium-doped fluorozirconate fibre can be used as an efficient amplifier over the wavelength range 800 - 815nm in the first telecommunications window. A small-signal gain of 23dB has been achieved at 805nm with 50mW of launched pump power at 780nm. The fibre used for this demonstration had a core diameter of 3.5µm, numerical aperture 0.16 and thulium ion concentration 800ppm by weight. The background loss of the fibre was measured to be less than 0.1dB/m. These results suggest that a high gain 800nm amplifier employing an AlGaAs diode-pumped thulium-doped fluorozirconate fibre can now be made.
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