Journal
OPTICS LETTERS
Volume 41, Issue 10, Pages 2197-2200Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.41.002197
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Funding
- Seventh Framework Programme (FP7) [258033, 287732]
- Engineering and Physical Sciences Research Council (EPSRC) [EP/I01196X/1]
- Engineering and Physical Sciences Research Council [EP/I01196X/1] Funding Source: researchfish
- EPSRC [EP/I01196X/1] Funding Source: UKRI
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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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