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Enhanced pump absorption efficiency in coiled and twisted double-clad thulium-doped fibers
Results of the first experimental demonstration of the recently proposed technique for improvement of the pump absorption in double-clad fibers by their simultaneous coiling and twisting are reported....
PublikationenSingle-Mode Multicore Fibers with Integrated Bragg Filters
Fiber Bragg gratings in single-mode fibers, used as narrowband filters, have reached a high maturity level, especially for applications in telecommunications and sensing. In spectroscopic applications,...
PublikationenDirect absorption measurements using laser induced deflection
High sensitivity and straightforward absolute calibration are combined using IPHT’s laser induced deflection (LID) technique for direct absorption measurements. The new “LID-sandwich-concept” allows...
PublikationenAmorphous silicon thin-film solar cells on glass fiber textiles
In this contribution, amorphous silicon thin-film solar cells on textile glass fiber fabrics for smart textiles are prepared and the photovoltaic performance is characterized. These solar cells on fabrics...
PublikationenFiber Bragg Grating Inscription in Optical Multicore Fibers
Fiber Bragg gratings as key components in telecommunication, fiber lasers, and sensing systems usually rely on the Bragg condition for single mode fibers. In special applications, such as in biophotonics...
PublikationenAll-fiber laser mode-locked by the acousto-optic modulation of a fiber Bragg grating in suspended core fiber
An ytterbium-doped fiber laser mode-locked by the interaction of a fiber Bragg grating and longitudinal acoustic waves in a suspended core fiber is experimentally investigated. An optimized design of an...
PublikationenThe REPUSIL process and the capability of fluorine doping for the adjustment of optical and thermochemical properties in silica materials
We report on the fluorine incorporation in powder based materials for the fabrication of Al and Al/Yb co-doped silica glasses. The achieved maximum Fluorine concentration of 1.55 mol% SiF4 corresponds...
PublikationenTHz Absorption in Fabric and Its Impact on Body Scanning for Security Application
In recent years, body scanner technologies based on millimeter-wave and terahertz technologies have been shown to improve security in areas sensitive to terrorist attacks by detecting hazardous objects...
PublikationenTwo-dimensional imaging in hyperbolic media–the role of field components and ordinary waves
We study full vector imaging of two dimensional source fields through finite slabs of media with extreme anisotropy, such as hyperbolic media. For this, we adapt the exact transfer matrix method for uniaxial...
PublikationenUltrathin niobium nanofilms on fiber optical tapers – a new route towards low-loss hybrid plasmonic modes
Due to the ongoing improvement in nanostructuring technology, ultrathin metallic nanofilms have recently gained substantial attention in plasmonics, e.g. as building blocks of metasurfaces. Typically,...
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