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3 October 1994 Characterization of a first window amplifier using a thulium-doped fluoride fiber
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A fully connectorized diode laser pumped first window amplifier has been constructed, for the first time, around a thulium doped fluoride fiber. For a 780/806 nm combination of pump and signal wavelengths intrinsic small signal gains of 25 - 26 dB and gain efficiencies of 2.4 dB/mW have been achieved. In addition output powers approaching +13 dBm from the doped fiber were possible for launched pump powers of 31 mW, which corresponds to a pump to signal conversion efficiency of around 64%. Minimum noise figures of 4 - 5 dB have been achieved with characteristics which mirror the output power performance. The 3 dB gain bandwidth for this transition has been measured at 9 - 10 nm for small signals, increasing to better than 15 nm under signal saturation conditions.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
R. Michael Percival, Daryl Szebesta, John R. Williams, Richard D.T. Lauder, Anne C. Tropper, and David C. Hanna "Characterization of a first window amplifier using a thulium-doped fluoride fiber", Proc. SPIE 2289, Doped Fiber Devices and Systems, (3 October 1994);

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