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Thulium-doped silica-based optical fibers for cladding pumped fiber amplifiers

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Academic year: 2021

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Figure

Fig.  1.  (a,  b)  TDFA  upconversion  pumping  schemes.  Dual- Dual-wavelength (c) and single-Dual-wavelength (d) TDFA setup
Fig. 2. Maximum gain and optimum TDF length for (a) dual  wavelength scheme using 800 nm + 1400 nm pump band and  (b) upconversion pumping at single wavelength

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