Essays about: "gratings"

Showing result 6 - 10 of 21 essays containing the word gratings.

  1. 6. Optical Fiber sensing of acoustic waves using overlapping FBGs

    University essay from Mittuniversitetet/Institutionen för elektronikkonstruktion

    Author : Erik Lillebø Hole; [2019]
    Keywords : Ultrasonic; Optical Fiber Sensing; Fiber Bragg Grating;

    Abstract : The objective of this thesis was to investigate if an optical fiber sensing method with the use of two overlapping fiber Bragg gratings to measure Lamb wave $S_0$ modes in a steel plate, and how it would compare to traditional PZT transducers. A solution was proposed where the use of an optical fiber sensing system was built and took advantage of the strain dependence of a fiber Bragg grating mounted to a steel plate. READ MORE

  3. 7. Design of an X-ray transfer beamline for the Soft X-ray project at MAX IV

    University essay from

    Author : Milad Emadi; Sofia Tynelius; Patric Beas Peterson; Johnny Ljung; [2019]
    Keywords : optics; focusing; beam; x-ray; MAX-IV; soft x-ray; transfer; matrix;

    Abstract : At the MAX-IV lab in Lund, there is a current goal to build a new soft X-Ray laser. The beam will be generated from a free-electron laser (FEL), which is an instrument consisting of high-speed electrons. The electrons move through alternating magnetic fields, causing the beam to become monochromatic. READ MORE

  4. 8. Controlling light with magneto-optical gratings

    University essay from Uppsala universitet/Materialfysik

    Author : Christina Vantaraki; [2019]
    Keywords : ;

    Abstract : .... READ MORE

  5. 9. Transient Plasma Photonic Crystals - A Route Towards Slow Ultra-intense Light?

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Author : Robin Weissenbilder; [2018]
    Keywords : slow; light; plasma; photonic; crystal; transient; ultra-intense; short; pulse; laser; Physics and Astronomy;

    Abstract : Periodic electron and ion density modulations in near critical density plasmas induced by counterpropagating femtosecond pulses of intensities on the order of 10¹⁵ to 10¹⁶ Wcm⁻² are described in a linear and stationary regime and investigated using particle-in-cell simulations in one and two dimensions. The periodic gratings produce transient plasma photonic crystals lasting up to several picoseconds with ultra-wide angle-selective band gaps on the order of Δω/ω₀ ≈ 10-20%. READ MORE

  6. 10. Method for the Characterisationof Grating Based Holographic Paper

    University essay from Uppsala universitet/Tillämpad materialvetenskap

    Author : Max Karlsson; [2016]
    Keywords : ;

    Abstract : Grating based holographic images and patterns are widely used in packaging to catch the eye of the consumer. The characteristic rainbow-like reflection of light from holographic papers can be used either by itself or with a print to create interesting contrasts and optical effects. READ MORE