Essays about: "optical fibers"

Showing result 11 - 15 of 47 essays containing the words optical fibers.

  1. 11. Distributed Temperature Sensing Using Phase-Sensitive Optical Time Domain Reflectometry

    University essay from KTH/Tillämpad fysik

    Author : Simon Ek; [2020]
    Keywords : Applied physics; Distributed optical fiber sensing; Rayleigh scattering; OTDR; phase-OTDR; Temperature; Refractive index; Strain; Correlation; RISE; Single mode fiber; SMF; Tillämpad fysik; Distribuerad optisk fibermätning; Rayleigh-spridning; OTDR; phase-OTDR; Temperatur; Brytningsindex; Töjning; RISE; Korrelation; Singelmodfiber; SMF;

    Abstract : This thesis explores and evaluates the temperature measuring capabilities of a phase-sensitive optical time-domain reflectometer (φ-OTDR), which exploits Rayleigh backscattering in normal single mode optical fibers. The device is constructed and its setup explained, and a protocol for making temperature measurements with it is developed. READ MORE

  3. 12. Abaca in the Philippines, an overview of a potential important resource for the country : Relating the tensile strength of the single fiber to the microfibrilar angle

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Victor Waller; Astrid Wilsby; [2019]
    Keywords : Abaca; fiber; renewable materials; Manila hemp; Industrial crops; Tensile strength;

    Abstract : Due to environmental concerns and to the limited amount of fossil fuel in the world theinterest in using renewable material has been and will continue to be on the rise. With theincreasing demand for renewable materials such as bio-based fibers, the research aroundnatural fibers is intensifying. READ MORE

  4. 13. The Influences on the Optical Properties of Paperboard Due to Dye Additives

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Tanya Wallmon; [2019]
    Keywords : White water; buildup; polymer; dye; CIELAB;

    Abstract : In the paper industry the appearance and optical performance of coated and uncoated paperboard is important, therefore colour dyes are widely used to enhance the paperboard. In order to enhance the appearance of paper products, the dyes are added directly into the pulp and/or in the coating. READ MORE

  5. 14. Automatic Measurement Setup for new Optical FPGA:s

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Tommy Lundberg; Daniel Nee; [2019]
    Keywords : silicon photonics; grating couplers; automatic testing; optical fibers;

    Abstract : Aiming to reduce research and development times in the field of silicon photonics, this paper presents a method for automatized device testing. Focus lies on automatic optical coupling between the grating couplers on a chip and optical fibers and efficient switching between devices when performing laboratory tests on silicon photonic chips. READ MORE

  6. 15. Design of a Temperature Insensitive Fiber Interferometer for Long-Term Laser Frequency Stabilization using Metal Coated Fibers

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

    Author : Saskia Bondza; [2019]
    Keywords : laser frequency stabilization; fiber interferometer; thermal sensitivity; optical fibers; drift-free; aluminum coated; thermal stress; Physics and Astronomy;

    Abstract : This work presents the design for a temperature drift-free path imbalanced ber interferometer for long-term laser frequency stabilization using coated bers with different thermal drift. For this purpose, single acrylate, dual acrylate, copper and aluminum coated bers are analyzed theoretically and experimentally regarding the thermal sensitivity of their optical path length. READ MORE