Sökning: "Poling"

Visar resultat 1 - 5 av 27 avhandlingar innehållade ordet Poling.

  1. 1. Components based on optical fibers with internal electrodes

    Detta är en avhandling från Stockholm : Fysik

    Författare :Niklas Myrén; KTH.; [2003]
    Nyckelord :Poling; twinhole fiber; fiber electrodes; silver film electrodes; silver diffusion; quasi-phase matching; optical switching; frequency conversion; optical modulation;

    Sammanfattning : 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). LÄS MER

  2. 2. Poled fiber devices

    Detta är en avhandling från Stockholm : KTH

    Författare :Niklas Myrén; KTH.; [2005]
    Nyckelord :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; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Sammanfattning : 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. LÄS MER

  3. 3. Double Poling Incross-Country Skiing Biomechanical and Physiological Analysis of Sitting and Standing Positions

    Detta är en avhandling från Sundsvall : Mid Sweden University

    Författare :Marie Lund Ohlsson; Mittuniversitetet.; [2018]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; blood lactate concentration; cross-country sit-skiing; impairment; internal kinetics; inverse dynamics simulations; joint reaction forces; kinematics; metabolic rate; musculoskeletal modelling; musculoskeletal efficiency; nordic skiing; oxygen uptake; para-skiing; respiration; skiing efficiency.;

    Sammanfattning : Double poling (DP) is a sub-technique in cross-country skiing that has increased in interest over the last decades, e.g. athletes in cross-country skiing have increased their utilisation of double poling during competitions. LÄS MER

  4. 4. Physiological demands of competitive elite cross-country skiing

    Detta är en avhandling från Umeå : Umeå University

    Författare :Magnus Carlsson; Umeå universitet.; Högskolan Dalarna.; [2015]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Performance capability; maximal oxygen uptake; lactate threshold; lean mass; double poling; power output; maximal speed; sprint skiing; distance skiing.; Health and Welfare; Hälsa och välfärd;

    Sammanfattning : Introduction Researchers have, for decades, contributed to an increased collective understanding of the physiological demands in cross-country skiing; however, almost all of these studies have used either non-elite subjects and/or performances that emulate cross-country skiing. To establish the physiological demands of cross-country skiing, it is important to relate the investigated physiological variables to the competitive performance of elite skiers. LÄS MER

  5. 5. QPM Devices in KTA and RKTP

    Detta är en avhandling från KTH Royal Institute of Technology

    Författare :Andrius Zukauskas; KTH.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; QPM; periodic poling; KTP;

    Sammanfattning : Even though KTiOPO4 (KTP) is considered to be one of the best nonlinear materials for quasi phase matched (QPM) frequency conversion in the visible and the near-infrared spectral regions, its use is often limited by poor material homogeneity, high ionic conductivity, a considerable linear absorption and photochromatic damage. On the other hand, the improved material homogeneity and the lower ionic conductivity of bulk Rb-doped KTP (RKTP) make this material an ideal alternative for fabrication of fine-pitch QPM gratings, while the arsenate isomorph KTiOAsO4 (KTA) promises a better performance in the green spectral region and adds the advantage of a wider transparency window in the infrared. LÄS MER