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Visar resultat 1 - 5 av 95 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Nonlinear materials for optical power limiting : characterization and modelling

    Författare :Hampus Lundén; Mikael Lindgren; Cesar Lopes; Bernd Eberle; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : High power laser pulses can be a threat to optical sensors, including the human eye. Traditionally this threat has been alleviated by colour filters that block radiation in chosen wavelength ranges. LÄS MER

  3. 2. Nonlinear Microwave Measurement Architectures for Wideband Device Characterization

    Författare :Sebastian Gustafsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nonlinear characterization; wideband; GaN HEMT; oscilloscope; microwave; active load-pull;

    Sammanfattning : The global surge for ubiquitous mobile communication requiring high speed and high capacity cellular networks has resulted in a golden age for the development of wireless technology. Modern cellular standards employ complex modulation formats with wider signal bandwidths to cope with the growing demand. LÄS MER

  4. 3. Fabrication and Characterization of Superconductive Coplanar Waveguide Resonators : Fabrication and Characterization of Superconductive Coplanar Waveguide Resonators

    Författare :Adem Ergül; David B. Haviland; Vladimir Krasnov; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Coplanar; Waveguide; Resonator; Superconductive; Fabrication; Characterization; Superconductivity; Supraledning;

    Sammanfattning : The objective of this thesis is to evaluate a generic process for fabrication and characterization of the Superconductive coplanar waveguide (CPW) resonators. Superconductive CPW resonators with various lengths and shapes are designed to investigate their electrical and magnetic properties as well as resonance properties and sensitivities. LÄS MER

  5. 4. Methods for Simulation and Characterization of Nonlinear Mechanical Structures

    Författare :Martin Magnevall; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nonlinear dynamics; nonlinear parameter estimation; harmonic balance; reverse-path; zero-memory nonlinear systems; hysteretic nonlinearities; dry-friction; geometric nonlinearities;

    Sammanfattning : Trial and error and the use of highly time-consuming methods are often necessary for modeling, simulating and characterizing nonlinear dynamical systems. However, for the rather common special case when a nonlinear system has linear relations between many of its degrees of freedom there are particularly interesting opportunities for more efficient approaches. LÄS MER

  7. 5. Short Pulses in Engineered Nonlinear Media

    Författare :Stefan Holmgren; Fredrik Laurell; Derryck Reid; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nonlinear optics; KTiOPO4; frequency conversion; mode-locked lasers; ultra-fast lasers; visible lasers; short pulses; ultrafast nonlinear optics; diagnostic applications of nonlinear optics; nonlinear optical materials; Physics; Fysik;

    Sammanfattning : Short optical pulses and engineered nonlinear media is a powerful combination. Mode locked pulses exhibit high peak powers and short pulse duration and the engineered ferro-electric KTiOPO4 facilitates several different nonlinear processes. LÄS MER