Browsing NTNU Open by Author "Østerberg, Ulf Lennart"
Now showing items 1-11 of 11
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A rangefinder for measuring vibrations of structures - Optical-FMCW interferometry
Grodås, Lars Christian Eriksson (Master thesis, 2014)The optical Frequency Modulated Continuous Wave (FMCW) technique along with utilizing the Doppler shift was investigated for the application of monitoring distance to and oscillation of a bridge. The equipment was borrowed ... -
Effect of (111)-oriented strain on the structure and magnetic properties of La2/3Sr1/3MnO3 thin films
Bolstad, Torstein; Lysne, Erik Nikolai; Hallsteinsen, Ingrid; Arenholz, E; Østerberg, Ulf Lennart; Tybell, Per Thomas Martin (Journal article; Peer reviewed, 2018)Using strain, i.e. subtle changes in lattice constant in a thin film induced by the underlying substrate, opens up intriguing new ways to control material properties. We present a study of the effects of strain on structural ... -
Measurement of ultrashort laser pulses using the Second-Harmonic Generation Frequency-Resolved Optical-Gating: Characterization of an ultrashort laser pulse
José Eduardo, Barqueros Muñoz (Master thesis, 2012)Communication technologies are continuosly evolving since were invented the telegraph. Nowadays, one of the most interesting and relatively youngest field of telecommunications are the optical communications. The search ... -
Nonlinear Pulse Propagation in Optical Fibers
Fructuoso Garcia, Alvaro (Master thesis, 2012)The project objective is to see how a pulse propagates along an optical fiber. This will take into account the linear effects of the fiber, as well as the nonlinear effects. Also be checked several commercial fiber types. ... -
Simulation of Ultrafast Pump-Probe Measurements for Semiconductors
Reinertsen, Johannes F (Master thesis, 2012)Ultrafast pump-probe spectroscopy is a powerful technique for measuring decay times for an optically excited system, e.g. a semiconductor, on the pico- to femtosecond time scale. We present both a classical approach and a ... -
Terahertz Time-Domain Spectroscopy
Skjeie, Hans Christian Bakken (Master thesis, 2012)The field of terahertz time-domain spectroscopy (THz-TDS) is still far from reaching its full potential, but is a very promising utility for a wide range of applications. Principle experiments have been performed in fields ... -
THz time domain spectroscopy of materials in reflection and transmission
Mølster, Kjell Martin (Master thesis, 2017)This thesis presents and describes various improvements to a Terahertz time domain spectroscopy setup using plasma filament for generation and free space electro optic sampling for detection. By performing measurements ... -
Towards Mid-IR Waveguide Lasers: Transition Metal Doped ZnS Thin Films
Karhu, Eric Andrew; Tolstik, Nikolai; Sorokin, Evgeni; Polyakov, Stanislav; Zamiri, Reza; Furtula, Vedran; Østerberg, Ulf Lennart; Sorokina, Irina T; Gibson, Ursula (Chapter; Peer reviewed, 2016)Thin films of Cr and Fe-doped ZnS suitable for waveguide mid-IR applications, with well-isolated TM2+ peaks, and Cr2+ absorption and fluorescence comparable to bulk crystals were investigated. Raman data indicate that the ... -
Ultrafast Optical and Magneto-Optical Kerr Effect Spectroscopy on Condensed Matter
Lysne, Erik Nikolai (Master thesis, 2017)In this masters project, an ultrafast optical spectroscopy system has been constructed and tested. The system was built as an extension to an existing spectroscopy system, centered around a mode-locked Ti:Sapphire femtosecond ... -
Ultrafast Spectroscopic Studies of Ferroelectric BaTiO3 Thin-Films on SrTiO3
Bergsagel, Øystein Johannes (Master thesis, 2016)In this masters thesis ultrafast spectroscopic studies have been performed on single-crystal 111 strontium titanate, SrTiO3, and pulsed-laser deposited (PLD) thin-films of ferroelectric barium titante, BaTiO3. This has ... -
Videreutvikling system for posisjonering/DP - test av prototyp system med øyesikker 1550 nm laser diode/fiber laser teknologi
Neteland, Iselin Silvana Haugen (Master thesis, 2017)This master work deals with investigating a laser based range finding system. The laser has a wavelength of 1 550 nm and the system will be comparable to SpotTrack, which uses 905 nm. This paper will build on the work ...