Sökning: "Optik"

Visar resultat 6 - 10 av 920 avhandlingar innehållade ordet Optik.

1. 6. Optical Properties of Nanoparticles in Composite Materials

   Författare :Lin Dong; Sergei Popov; Ari Friberg; Toralf Scharf; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Nanoparticles are synthetic structures with dimension from 1 to 100 nanometers and are various in types. Some favorable properties peculiar to the nanoparticles (generally owing to size effects) make them prevailing and beneficial for applications in different scientific and engineering fields. LÄS MER

3. 7. Structural Information Content of the Optical Field

   Författare :Per Martinsson; Ari Friberg; Karl-Heinz Brenner; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Photonics; Fotonik;

   Sammanfattning :  The communication modes are a mathematical technique for the description of structural information in optical fields. These modes are orthogonal, optimally  connected functions characteristic of the optical system. Mathematically they are obtained by the singular value decomposition (SVD) of the operator that represents the field propagation. LÄS MER

4. 8. DSP based Chromatic Dispersion Equalization and Carrier Phase Estimation in High Speed Coherent Optical Transmission Systems

   Författare :Tianhua Xu; Sergei Popov; Gunnar Jacobsen; Jie Li; Seb Savory; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; coherent detection; chromatic dispersion; carrier phase estimation; quadrature phase shift keying; SRA - ICT; SRA - Informations- och kommunikationsteknik;

   Sammanfattning : Coherent detection employing multilevel modulation formats has become one of the most promising technologies for next generation high speed transmission systems due to the high power and spectral efficiencies. Using the powerful digital signal processing (DSP), coherent optical receivers allow the significant equalization of chromatic dispersion (CD), polarization mode dispersion (PMD), phase noise (PN) and nonlinear effects in the electrical domain. LÄS MER

5. 9. Time-Resolved Spectroscopy for Pharmaceutical Applications

   Författare :Christoffer Abrahamsson; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Elektromagnetism; optik; Near-infrared spectroscopy; Time-resolved spectroscopy; Pharmaceutical analysis; Multivariate data analysis; Electromagnetism; Light transport in turbid media; Photon migration; akustik; acoustics; optics;

   Sammanfattning : The work presented in this thesis aims at improving spectroscopic techniques for analysis of pharmaceutical solids. This improvement is achieved by the combining and development of instrumentations and data evaluation tools from two research fields: the fields of near infrared spectroscopy and biomedical optics. LÄS MER

7. 10. Femtosecond Dynamics of Dissociation and Isomerization Reactions in Solutions

   Författare :Jose-Luis Alvarez; Kemisk fysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; optics; Electromagnetism; Photochemistry; Fotokemi; acoustics; Elektromagnetism; optik; akustik; Fysicumarkivet A:1997:Alvarez;

   Sammanfattning : The main purpose of this work has been to investigate the fundamental dynamics of photodissociation and photo-induced isomerization reactions in the condensed phase. These "elementary" reactions have been chosen as model processes for exploring the influence of the solvent on a chemical event, as well as the factors that control this influence. LÄS MER