Search for dissertations about: "electric field poling"

Showing result 1 - 5 of 13 swedish dissertations containing the words electric field poling.

  2. 1. Poled fiber devices

    Author : Niklas Myrén; Fredrik Laurell; Faman Kashyap; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; optical physics; Poling; twin-hole fiber; fiber electrodes; silver film electrodes; silver diffusion; quasi-phase matching; optical switching; frequency conversion; optical modulation; Fysik; Physics; Fysik;

    Abstract : The topic of this thesis is the development of devices for telecom applications based on poled optical fibers. The focus is on a specific function, optical switching/modulation. Some of the most important results are summarized below. Optical switching at telecom wavelengths (1. READ MORE

  4. 2. Components based on optical fibers with internal electrodes

    Author : Niklas Myrén; KTH; []
    Keywords : Poling; twinhole fiber; fiber electrodes; silver film electrodes; silver diffusion; quasi-phase matching; optical switching; frequency conversion; optical modulation;

    Abstract : The topic of this thesis is development ofdevices fortelecom applications based on poled optical fibers. The focusis on two different specific functions, wavelength conversionand optical switching.Optical switching is demonstrated in a poled optical fiberat telecom wavelengths (~1.55 mm). READ MORE

  5. 3. 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

  6. 4. Ferroelectric domain engineering and characterization for photonic applications

    Author : Simonetta Grilli; Fredrik Laurell; Wolfgang Sohler; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; LiNbO; KTiOPO; interferometry; digital holography; electric field poling; electro-optic materials; holographic lithography; ferroelectric domains; nanostructures; microstructures; Optical physics; Optisk fysik;

    Abstract : Lithium niobate (LiNbO3) and KTiOPO4 (KTP) are ferroelectric crystals of considerable interest in different fields of optics and optoelectronics. Due to its large values of the nonlinear optical, electro-optic (EO), piezoelectric and acousto-optical coefficients, LiNbO3 is widely used for laser frequency conversion using the quasiphase matching (QPM) approach where the sign of nonlinearity has been periodically modulated by electric field poling (EFP). READ MORE

  7. 5. Fabrication and characterization of periodically poled KTB and RB-doped KTB for applications in the visible and UV

    Author : Shunhua Wang; Fredrik Laurell; Peter Smith; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nonlinear optics; second-harmonic generation; quasi-phasematching; type-I QPM SHG; type-II QPM SHG; KTP; RKTP; periodic electric-field poling; Physics; Fysik;

    Abstract : This thesis deals with the fabrication and the characterization of periodically-poled crystals for use in lasers to generate visible and UV radiation by second-harmonic generation (SHG) through quasi-phasematching (QPM). Such lasers are of practical importance in many applications like high-density optical storage, biomedical instrumentation, colour printing, and for laser displays. READ MORE