Search for dissertations about: "nonlinear optics"

Showing result 21 - 25 of 134 swedish dissertations containing the words nonlinear optics.

  2. 21. Quasi-Phasematched nonlinear processes in KTiOPO4 isomorphs

    Author : Anna Fragemann; KTH; []
    Keywords : nonlinear optics; optical parametric oscillator; optical parametric amplifier; KTiOPO4; RbTiOPO4; quasi-phasematched; electric field poling;

    Abstract : This thesis explores the use of nonlinear crystals from theKTiOPO4(KTP) family with the aim to extend the possibleapplications for laser sources and to gain more knowledge aboutthe material’s benefits and limits. The work focussed onoptical parametric oscillators (OPOs) and optical parametricamplifiers (OPAs), which employ second order nonlinearprocesses. READ MORE

  4. 22. Liquid crystalline polymers for nonlinear optics : pyroelectric polymers and ferroelectric dendrimers

    Author : Jonas Örtegren; KTH; []
    Keywords : ;

    Abstract : This thesis deals with liquid crystalline materialsincluding monomers, side-chain polymers, crosslinked polymers,and dendrimers. The materials are pyroelectric, meaning thatthere is a macroscopic electric polarization in the material,which is energetically stable in the absence of externalfields. READ MORE

  5. 23. Tailored fiber lasers and their use in nonlinear optics

    Author : Peter Zeil; Fredrik Laurell; Andy Clarkson; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik;

    Abstract : The objective of this thesis work was to develop tailored fiber lasers, which meet the pump requirement for efficient continuous-wave (cw) frequency conversion to the visible and the mid-infrared wavelength regimes: a stable, high-power, wavelength-tunable, narrow-linewidth output in a single polarization. As a first step, the prospect of tuning ytterbium fiber lasers over an unprecedented wavelength range, from 980nm to 1100nm, was investigated. READ MORE

  6. 24. Mitigation of nonlinear fiber distortion using phase conjugation

    Author : Henrik Eliasson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fiber-optic communication; nonlinear optics; phase conjugation; phase-sensitive amplifiers;

    Abstract : This thesis is devoted to the study of fiber-optic communication systems that mitigate nonlinear distortion due to the Kerr effect by transmitting a phase-conjugated copy alongside the signal followed by coherent superposition. This kind of communication systems are referred to as phase-conjugated twin waves systems when the phase-conjugated copy is transmitted on the orthogonal polarization. READ MORE

  7. 25. Pulse Propagation in Nonlinear Media and Photonic Crystals

    Author : Victor Kimberg; Faris Gelmukhanov; Shaul Mukamel; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Photonic Crystals; Nonlinear optics; X-ray spectroscopy; Theoretical chemistry; Teoretisk kemi;

    Abstract : The present thesis is devoted to theoretical studies of pulse propagation of light through linear and nonlinear media, and of light-induced nuclear dynamics. The first part of the thesis addresses propagation of light pulses in linear periodical media - photonic crystals. READ MORE