6558 Search results for: „“
Fluorescence detection for phosphate monitoring using reverse injection analysis
We present a novel design for a compact flow-through fluorescence detector for flow analyses applications and prove its functionality in the experiment. The detector operates by detecting the diffusely...
PublicationsTwo-dimensional temperature measurements in particle loaded technical flames by filtered Rayleigh scattering
Filtered Rayleigh scattering (FRS) is applied to determine two-dimensional temperature distributions in a hexamethyldisiloxane loaded propane/air flame intended for combustion chemical vapor deposition...
PublicationsComponent design and testing for a miniaturised autonomous sensor based on a nanowire materials platform
We present the design considerations of an autonomous wireless sensor and discuss the fabrication and testing of the various components including the energy harvester, the active sensing devices and the...
PublicationsSpatially resolved in-core temperature measurement in rare-earth doped fibers during pumping
We demonstrate a spatially distributed measurement technique to observe temperature changes along a pumped Ybdoped fiber. The technique is based on an array of fiber Bragg gratings acting as temperature...
PublicationsInvestigation of a large core 976 nm Yb fiber laser for high brightness fiber-based pump sources
We demonstrate three-level laser operation at 976 nm of a large-core Yb-doped aluminosilicate fiber, which is fabricated by powder-sinter technology and shows a very homogeneous refractive index profile....
PublicationsAdvanced fabrication and calibration of high-temperature sensor elements based on sapphire fiber Bragg gratings
In this paper, improved fabrication and calibration techniques of Fiber Bragg Gratings (FBG) for very high temperature sensing applications up to more than 1500 °C will be presented. The fibers used are...
PublicationsFocused ion beam post-processing of optical fiber Fabry-Perot cavities for sensing applications
Focused ion beam technology is combined with chemical etching of specifically designed fibers to create Fabry-Perot interferometers. Hydrofluoric acid is used to etch special fibers and create microwires...
PublicationsMidinfrared frequency combs from coherent supercontinuum in chalcogenide and optical parametric oscillation
We observe the coherence of the supercontinuum generated in a nanospike chalcogenide-silica hybrid waveguide pumped at 2 μm. The supercontinuum is shown to be coherent with the pump by interfering it...
PublicationsFiber Bragg gratings in hydrogen-loaded photosensitive fiber with two regeneration regimes
In a highly Ge-doped photosensitive fiber co-doped with phosphorus and fluorine and with a doped inner cladding, we observed, during annealing experiments, an anomalous variation of the FBG strength as...
PublicationsOptical Inclinometer Based on a Phase-Shifted Bragg Grating in a Taper Configuration
A simple optical inclinometer based on a phase-shifted Bragg grating in a taper configuration is proposed. Two phase-shifted fiber Bragg gratings were fabricated using a DUV femtosecond laser technique...
Publications