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The mid-infrared (MIR) spans the 3 – 25 µm wavelength range. Rare-earth-ion doped selenide-chalcogenide glasses are being developed for direct-emission MIR fibre lasers. The true Pr3+ absorption cross-section in the 3.5 – 6 µm wavelength region of a Pr3+-doped (500 ppmw of Pr3+ i.e. 9.47×1019 Pr3+ ions cm−3) GeAsGaSe host-glass is presented, after numerically removing the underlying, extrinsic vibrational...
Chalcogenide glasses are promising materials for mid-infrared (MIR) fibre optic applications i.e. 3–25 μm wavelength. Their low phonon energy is attractive not only for passive mid-IR transmission fibre-conduits but also for active fibre. For the latter, rare earth (RE-)-ion doped chalcogenide glasses have been investigated, as direct emission mid-IR fibre lasers. The quality of the chalcogenide glass...
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