Sökning: "fibre laser"

Visar resultat 16 - 20 av 58 avhandlingar innehållade orden fibre laser.

1. 16. Strength grading of structural timber and EWP laminations of Norway spruce : Development potentials

   Författare :Jan Oscarsson; Anders Olsson; Marie Johansson; Mikael Perstorper; SP Sveriges Tekniska Forskningsinstitut; []
   Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; bending strength; fibre angle; grain angle; knots; laser scanning; machine strength grading; modulus of elasticity; strain measurement; structural timber; tensile strength; wood; böjhållfasthet; draghållfasthet; elasticitetsmodul; fibervinkel; konstruktionsvirke; kvistar; laserskanning; maskinell hållfasthetssortering; trä; töjningsmätning; Byggteknik; Civil engineering;

   Sammanfattning : Strength grading of structural timber is a process by which value is added to sawn products. It is to the greater part carried out using machine grading based on statistical relationships between so called indicating properties and bending strength. LÄS MER

3. 17. Network Disruption and Turbulence in Fibre Suspensions

   Författare :Sven Andersson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; transition; friction; refractive index matching; Laser Doppler Anemometry LDA ; boundary-layer; Computational Fluid Dynamics CFD ; medium consistency MC ; network strength; fluidisation; pulp; suspension; fibres;

   Sammanfattning : The production of paper pulp involves the handling of large quantities of fibre suspensions. Today's call for energy efficiency and environmentally sound processes has led to the development of MC (Medium Consistency) technology. LÄS MER

4. 18. Applications of laser spectroscopy to analytical chemistry, environmental monitoring and medicine

   Författare :Thomas Johansson; Förbränningsmotorer; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fluorescence; spectroscopic techniques; fluorescence imaging; capillary electrophoresis; acoustic levitation; remote sensing; interstitial photodynamic therapy; multivariate analysis; Laserteknik; Laser technology; tissue optics; medical imaging; Fysicumarkivet A:2002:Johansson;

   Sammanfattning : In this thesis spectroscopic techniques have been used in the fields of analytical chemistry, environmental and medical applications. In analytical chemistry, laser induced fluorescence was used to image the separation of substances during capillary electrophoresis. LÄS MER

5. 19. Fibre Bragg Grating Components for Filtering, Switching and Lasing

   Författare :Zhangwei Yu; Lars Thylén; Pierre-Yves Fonjallaz; Lin Zhang; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fibre Bragg grating; photosensitivity; apodization; chirp; phase-shift; microwave optical filtering; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

   Sammanfattning : Fibre Bragg gratings (FBGs) are key components for a vast number of applications in optical communication systems, microwave photonics systems, and optical sensors, etc. The main topic of this thesis is fibre Bragg grating fabrication and applications in direct microwave optical filtering, high speed switching and switchable dual-wavelength fibre lasers. LÄS MER

7. 20. Sampling depth in Laser Doppler flowmetry

   Författare :Anneli Jakobsson; Linköpings universitet; []
   Nyckelord :MEDICINE; MEDICIN;

   Sammanfattning : The influence of probe design on the measuring depth in laser Doppler flowmetry using a 632.8 nm light source has been investigated by in vivo models and Monte Carlo simulations. Five different probe configurations were used to measure perfusion in feline intestine to which a constant blood flow was applied. LÄS MER