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Showing result 1 - 5 of 9 essays matching the above criteria.

  1. 1. Simultaneous measurement and discrimination of temperature and strain in distributed fiber optical systems with fiber Bragg gratings

    University essay from Uppsala universitet/Fasta tillståndets fysik

    Author : Helene Alexandra Mastrothanasis; [2021]
    Keywords : ;

    Abstract :  This master thesis deals with simultaneous measurement and discrimination of temperature and strain using fiber Bragg gratings(FBGs). Saab Avionics is seeking for a further development of the overheat detection system that gives a warning when a heat leakage is detected. READ MORE

  3. 2. Transmission characterization of fiber Bragg gratings arrays for intracavity spectral control of a 1.5 micrometer fiber laser

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Hu Leo Qiyuan; Pontus Jäderholm; [2021]
    Keywords : ;

    Abstract : This thesis aims to investigate whether a fiber Bragg grating array (FBGA) can be designed to reduce the bandwidth of light from a 1.5 µm fiber laser while the distances between the fiber Bragg gratings are in the 10-20 cm range. READ MORE

  4. 3. Periodic and Non-Periodic Filter Structures in Lasers

    University essay from KTH/Matematik (Avd.)

    Author : Leo Enge; [2020]
    Keywords : Laser; Grating Filters; Perturbation Theory; WKB Approximation; Bi-cubic Splines; Laser; optiska filter; störningsteori; WKB-approximation; bi-kubiska splines;

    Abstract : Communication using fiber optics is an integral part of modern societies and one of the most important parts of this is the grating filter of a laser. In this report we introduce both the periodic and the non-periodic grating filter and discuss how there can be resonance in these structures. READ MORE

  5. 4. 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

  6. 5. 3D-printed temperature sensors based on Fiber Bragg Gratings

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Ksenia Loskutova; Daniel Neuman; [2016]
    Keywords : ;

    Abstract : Fiber Bragg Gratings is a type of optical sensor used to measure temperature in many different fields. They have many advantages in relation to standard electric thermometers. READ MORE