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. 2016 May 15;41(10):2197-200.
doi: 10.1364/OL.41.002197.

Exploiting the short wavelength gain of silica-based thulium-doped fiber amplifiers

Z Li, Y Jung, J M O Daniel, N Simakov, M Tokurakawa, P C Shardlow, D Jain, J K Sahu, A M Heidt, W A Clarkson, S U Alam, D J Richardson

Exploiting the short wavelength gain of silica-based thulium-doped fiber amplifiers

Z Li et al. Opt Lett. .

Abstract

Short wavelength operation (1650-1800 nm) of silica-based thulium-doped fiber amplifiers (TDFAs) is investigated. We report the first demonstration of in-band diode-pumped silica-based TDFAs working in the 1700-1800 nm waveband. Up to 29 dB of small-signal gain is achieved in this spectral region, with an operation wavelength accessible by diode pumping as short as 1710 nm. Further gain extension toward shorter wavelengths is realized in a fiber laser pumped configuration. A silica-based TDFA working in the 1650-1700 nm range with up to 29 dB small-signal gain and noise figure as low as 6.5 dB is presented.

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