Search for dissertations about: "optical fibers"

Showing result 1 - 5 of 81 swedish dissertations containing the words optical fibers.

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

    University dissertation from Stockholm : Fysik

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

    Abstract : 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). READ MORE

  2. 2. Photosensitivity, chemical composition gratings and optical fiber based components

    University dissertation from Stockholm : KTH

    Author : Michael Fokine; KTH.; [2002]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; optical fibers; fiber bragg gratings; photosensitivity; thermal stability; NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : The different topics of this thesis include high-temperaturestable fiber Bragg gratings, photosensitivity and fiber basedcomponents.Fiber Bragg gratings (FBG) are wavelength dispersiverefractive index structures manufactured through UV exposure ofoptical fibers. READ MORE

  3. 3. Poled fiber devices

    University dissertation from Stockholm : KTH

    Author : Niklas Myrén; KTH.; [2005]
    Keywords : 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;

    Abstract : 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. READ MORE

  4. 4. Modulation Optimization for Noncoherent Optical Systems

    University dissertation from Stockholm : KTH

    Author : Johnny Karout; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Direct detection; noncoherent communications; lattice codes; mutual information; fiber-optical communications; intensity modula- tion; sphere packing.; infrared communications; free-space optical communications;

    Abstract : There has been a significant improvement in high-speed electronics and optical components over the past few years, and this is one of the key enabling factors for high data rate transmission. Moreover, multi- level modulation formats, which encode information onto the carrier’s amplitude and phase, are necessary to increase the spectral efficiency of communication systems. READ MORE

  5. 5. Short-range Optical Communications using 4-PAM

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Tamas Lengyel; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Data communication; vertical cavity surface emitting lasers; 4-PAM; IM DD; NRZ OOK; optical interconnects; short-range fiber optic links; multimode fiber; inter-symbol interference; intensity modulation;

    Abstract : As the demand for ever higher throughput short-range optical links is growing, research and industry has shown increased interest in multilevel modulation formats, such as the four leveled pulse amplitude modulation, referred to as 4-PAM. As on-off keying persists to be the choice for low latency applications, such as high performance computing, datacenter operators see 4-PAM as the next format to succeed current OOK-based optical interconnects. READ MORE