Mechanical testing of fibre ID-1144 after drawing to 26 % (well within plastic deformation); the ... more Mechanical testing of fibre ID-1144 after drawing to 26 % (well within plastic deformation); the initial radius is reduced to 71.7 µm.
Information and Communication Technologies (ICTs) are connected to issues of sustainability in ma... more Information and Communication Technologies (ICTs) are connected to issues of sustainability in many ways.
Knowledge of an individual's skin condition is important for pressure ulcer prevention. Detec... more Knowledge of an individual's skin condition is important for pressure ulcer prevention. Detecting early changes in skin through perfusion, oxygen saturation values, and pressure on tissue and subsequent therapeutic intervention could increase patients' quality of life drastically. However, most existing sensing options create additional risk of ulcer development due to further pressure on and chafing of the skin. Here, as a first component, we present a flexible, photonic textile-based sensor for the continuous monitoring of the heartbeat and blood flow. Polymer optical fibres (POFs) are melt-spun continuously and characterized optically and mechanically before being embroidered. The resulting sensor shows flexibility when embroidered into a moisture-wicking fabric, and withstands disinfection with hospital-type laundry cycles. Additionally, the new sensor textile shows a lower static coefficient of friction (COF) than conventionally used bedsheets in both dry and sweaty conditions versus a skin model. Finally, we demonstrate the functionality of our sensor by measuring the heartbeat at the forehead in reflection mode and comparing it with commercial finger photoplethysmography for several subjects. Our results will allow the development of flexible, individualized, and fully textile-integrated wearable sensors for sensitive skin conditions and general long-term monitoring of patients with risk for pressure ulcer.
Crystal defects present in GaAs nanocrystals ∼15-50 nm in diameter and grown by metal organic vap... more Crystal defects present in GaAs nanocrystals ∼15-50 nm in diameter and grown by metal organic vapor phase epitaxy on top of two different nanopatterned Si(001) substrates (nanopillars and nanotips with ∼40-80 nm openings embedded in a SiO matrix) and on a planar substrate, have been investigated by means of atomic-resolution aberration-corrected scanning transmission electron microscopy. Conditions of their formation are discussed. The defect analysis of the three GaAs/Si systems reveals a higher defect density in the GaAs crystals grown on nanopillars as compared to those grown on nanotips and the planar substrate, possibly concomitant to the atomic-scale irregularities identified at the patterned Si(001) nanopillars. It is concluded that the misfit strain in the GaAs nanocrystals is fully plastically relaxed while no noticeable substrate compliance effects are observed on any of the studied substrates.
Summary Full-wafer fal~rication of A1GaAs lasers, which have mirrors etched by chemically assiste... more Summary Full-wafer fal~rication of A1GaAs lasers, which have mirrors etched by chemically assisted ion-beam etching and passivated by ion-beam sputtered AlzO3, is described. Full-wafer testing techniques for both laser parameters (P-l, far-field, spectrum, T0), as well as other test sites for process development and control (critical dimensions, overlay, etch depths, sheet resistances) have been developed, q'he lasers have excellent beam
Knowledge of an individual's skin condition is important for pressure ulcer prevention. Detec... more Knowledge of an individual's skin condition is important for pressure ulcer prevention. Detecting early changes in skin through perfusion, oxygen saturation values, and pressure on tissue and subsequent therapeutic intervention could increase patients' quality of life drastically. However, most existing sensing options create additional risk of ulcer development due to further pressure on and chafing of the skin. Here, as a first component, we present a flexible, photonic textile-based sensor for the continuous monitoring of the heartbeat and blood flow. Polymer optical fibres (POFs) are melt-spun continuously and characterized optically and mechanically before being embroidered. The resulting sensor shows flexibility when embroidered into a moisture-wicking fabric, and withstands disinfection with hospital-type laundry cycles. Additionally, the new sensor textile shows a lower static coefficient of friction (COF) than conventionally used bedsheets in both dry and sweaty con...
Tunable dispersion compensators will be presented that are based on finite- and infinite-impulse ... more Tunable dispersion compensators will be presented that are based on finite- and infinite-impulse response lattice filters. The compact waveguide devices compensate for linear- and higher-order dispersion with low delay ripple and show a wide dispersion tuning range
Digest of the LEOS Summer Topical Meetings Biophotonics/Optical Interconnects and VLSI Photonics/WBM Microcavities, 2004.
Roger Dangel'*, Urs Bapst', Christoph Berger',... more Roger Dangel'*, Urs Bapst', Christoph Berger', Rend Beyeler', Laurent Dellmann'72, Folkert Horst', Bert Offrein', and Gian-Luca Bona' ... IBM Zurich Research Laboratory, Rueschlikon, Switzerland 2Swiss Federal Institute of Technology (ETH), Zurich, Switzerland 1
OFC/IOOC . Technical Digest. Optical Fiber Communication Conference, 1999, and the International Conference on Integrated Optics and Optical Fiber Communication
A wavelength-tunable optical add/drop filter for wavelength-division multiplexing at 1550 nm was ... more A wavelength-tunable optical add/drop filter for wavelength-division multiplexing at 1550 nm was realized using planar silicon-oxynitride waveguides. The filters show low insertion loss, high isolation figures and negligible polarization dependence
The polarization of the electrons emitted by a KrF excimer laser (pulse duration 16 ns) from poly... more The polarization of the electrons emitted by a KrF excimer laser (pulse duration 16 ns) from polycrystalline iron has been measured as a function of pulse energy. The results are well accounted for by an optical-heating model where the spin and lattice systems have identical temperatures.
We prove the capability of adaptive PMD compensation with integrated optical FIR-filters in latti... more We prove the capability of adaptive PMD compensation with integrated optical FIR-filters in lattice structure and an electrical spectrum monitoring based feedback signal in 40 Gb/s experiments. Moreover we present the combined PMD and GVD compensation.
Mechanical testing of fibre ID-1144 after drawing to 26 % (well within plastic deformation); the ... more Mechanical testing of fibre ID-1144 after drawing to 26 % (well within plastic deformation); the initial radius is reduced to 71.7 µm.
Information and Communication Technologies (ICTs) are connected to issues of sustainability in ma... more Information and Communication Technologies (ICTs) are connected to issues of sustainability in many ways.
Knowledge of an individual's skin condition is important for pressure ulcer prevention. Detec... more Knowledge of an individual's skin condition is important for pressure ulcer prevention. Detecting early changes in skin through perfusion, oxygen saturation values, and pressure on tissue and subsequent therapeutic intervention could increase patients' quality of life drastically. However, most existing sensing options create additional risk of ulcer development due to further pressure on and chafing of the skin. Here, as a first component, we present a flexible, photonic textile-based sensor for the continuous monitoring of the heartbeat and blood flow. Polymer optical fibres (POFs) are melt-spun continuously and characterized optically and mechanically before being embroidered. The resulting sensor shows flexibility when embroidered into a moisture-wicking fabric, and withstands disinfection with hospital-type laundry cycles. Additionally, the new sensor textile shows a lower static coefficient of friction (COF) than conventionally used bedsheets in both dry and sweaty conditions versus a skin model. Finally, we demonstrate the functionality of our sensor by measuring the heartbeat at the forehead in reflection mode and comparing it with commercial finger photoplethysmography for several subjects. Our results will allow the development of flexible, individualized, and fully textile-integrated wearable sensors for sensitive skin conditions and general long-term monitoring of patients with risk for pressure ulcer.
Crystal defects present in GaAs nanocrystals ∼15-50 nm in diameter and grown by metal organic vap... more Crystal defects present in GaAs nanocrystals ∼15-50 nm in diameter and grown by metal organic vapor phase epitaxy on top of two different nanopatterned Si(001) substrates (nanopillars and nanotips with ∼40-80 nm openings embedded in a SiO matrix) and on a planar substrate, have been investigated by means of atomic-resolution aberration-corrected scanning transmission electron microscopy. Conditions of their formation are discussed. The defect analysis of the three GaAs/Si systems reveals a higher defect density in the GaAs crystals grown on nanopillars as compared to those grown on nanotips and the planar substrate, possibly concomitant to the atomic-scale irregularities identified at the patterned Si(001) nanopillars. It is concluded that the misfit strain in the GaAs nanocrystals is fully plastically relaxed while no noticeable substrate compliance effects are observed on any of the studied substrates.
Summary Full-wafer fal~rication of A1GaAs lasers, which have mirrors etched by chemically assiste... more Summary Full-wafer fal~rication of A1GaAs lasers, which have mirrors etched by chemically assisted ion-beam etching and passivated by ion-beam sputtered AlzO3, is described. Full-wafer testing techniques for both laser parameters (P-l, far-field, spectrum, T0), as well as other test sites for process development and control (critical dimensions, overlay, etch depths, sheet resistances) have been developed, q'he lasers have excellent beam
Knowledge of an individual's skin condition is important for pressure ulcer prevention. Detec... more Knowledge of an individual's skin condition is important for pressure ulcer prevention. Detecting early changes in skin through perfusion, oxygen saturation values, and pressure on tissue and subsequent therapeutic intervention could increase patients' quality of life drastically. However, most existing sensing options create additional risk of ulcer development due to further pressure on and chafing of the skin. Here, as a first component, we present a flexible, photonic textile-based sensor for the continuous monitoring of the heartbeat and blood flow. Polymer optical fibres (POFs) are melt-spun continuously and characterized optically and mechanically before being embroidered. The resulting sensor shows flexibility when embroidered into a moisture-wicking fabric, and withstands disinfection with hospital-type laundry cycles. Additionally, the new sensor textile shows a lower static coefficient of friction (COF) than conventionally used bedsheets in both dry and sweaty con...
Tunable dispersion compensators will be presented that are based on finite- and infinite-impulse ... more Tunable dispersion compensators will be presented that are based on finite- and infinite-impulse response lattice filters. The compact waveguide devices compensate for linear- and higher-order dispersion with low delay ripple and show a wide dispersion tuning range
Digest of the LEOS Summer Topical Meetings Biophotonics/Optical Interconnects and VLSI Photonics/WBM Microcavities, 2004.
Roger Dangel'*, Urs Bapst', Christoph Berger',... more Roger Dangel'*, Urs Bapst', Christoph Berger', Rend Beyeler', Laurent Dellmann'72, Folkert Horst', Bert Offrein', and Gian-Luca Bona' ... IBM Zurich Research Laboratory, Rueschlikon, Switzerland 2Swiss Federal Institute of Technology (ETH), Zurich, Switzerland 1
OFC/IOOC . Technical Digest. Optical Fiber Communication Conference, 1999, and the International Conference on Integrated Optics and Optical Fiber Communication
A wavelength-tunable optical add/drop filter for wavelength-division multiplexing at 1550 nm was ... more A wavelength-tunable optical add/drop filter for wavelength-division multiplexing at 1550 nm was realized using planar silicon-oxynitride waveguides. The filters show low insertion loss, high isolation figures and negligible polarization dependence
The polarization of the electrons emitted by a KrF excimer laser (pulse duration 16 ns) from poly... more The polarization of the electrons emitted by a KrF excimer laser (pulse duration 16 ns) from polycrystalline iron has been measured as a function of pulse energy. The results are well accounted for by an optical-heating model where the spin and lattice systems have identical temperatures.
We prove the capability of adaptive PMD compensation with integrated optical FIR-filters in latti... more We prove the capability of adaptive PMD compensation with integrated optical FIR-filters in lattice structure and an electrical spectrum monitoring based feedback signal in 40 Gb/s experiments. Moreover we present the combined PMD and GVD compensation.
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