Characterization of a first window amplifier using a thulium-doped fluoride fiber

R. Michael Percival; Daryl Szebesta; John R. Williams; Richard D.T. Lauder; Anne C. Tropper; David C. Hanna

doi:10.1117/12.188704

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3 October 1994 Characterization of a first window amplifier using a thulium-doped fluoride fiber

R. Michael Percival, Daryl Szebesta, John R. Williams, Richard D.T. Lauder, Anne C. Tropper, David C. Hanna

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Proceedings Volume 2289, Doped Fiber Devices and Systems; (1994) https://doi.org/10.1117/12.188704
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

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.

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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); https://doi.org/10.1117/12.188704

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