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We demonstrate 2.074-$\mu \text{m}$ lasing from Ho3+-doped fluorotellurite microstructured fibers (FTMFs) pumped by a 1120-nm Yb3+-doped fiber laser. Ho3+-doped FTMFs based on TeO2–BaF2–Y2O3 glasses are fabricated by using a rod-in-tube method. With increasing the pump power to 253 mW, lasing at 2.074 $\mu \text{m}$ is achieved from a 42-cm-long Ho3+-doped FTMF. With further increasing the pump...
The wideband absorbance of the absorber has been realized by modifying geometrical shape of conventional rectangular patch in single periodic cell. The increase of relative bandwidth of this new absorptive cell structure with E-shaped patch can reach and exceed 100% with respect to the centre frequency comparing with rectangular patch. The new structure of absorber exciting a new broadband resonant...
A simple means to obtain the performance of dualband terahertz absorber was demonstrated with numerical approaches in this paper. The dual-band absorbance of a single-layer nearly perfect absorber has been realized by employing the two conventional FSS single frequency resonant elements with different geometry shapes in single periodic cell, which can provide two tunable resonant frequencies independently...
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