Search for dissertations about: "thesis grating"

Showing result 1 - 5 of 78 swedish dissertations containing the words thesis grating.

  1. 1. VCSELs for High-Speed, Long-Reach, and Wavelength-Multiplexed Optical Interconnects

    Author : Erik Haglund; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; mode filter; high-contrast grating; oxide aperture; high-speed modulation; wavelength control; spectral width; vertical-cavity surface-emitting laser; optical interconnect; quasi-single-mode;

    Abstract : The vertical-cavity surface-emitting laser (VCSEL) is the standard light source in short-reach fiber-optic links in datacenters and supercomputers. These systems use an enormous number of links, making cost and energy efficiency pressing issues. READ MORE

  2. 2. Mode and Polarization Control in VCSELs using Surface Structures

    Author : Åsa Haglund; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; single mode; dynamics; surface relief; Semiconductor laser; polarization; vertical-cavity surface-emitting laser; sub-wavelength grating; fabrication;

    Abstract : The vertical-cavity surface-emitting laser (VCSEL) is a novel, low-cost light source with many attractive performance characteristics, such as low operating current, circular output beam, and high modulation bandwidth at low currents. This together with its easy integration into two-dimensional arrays has made it an established transmitter in short-distance single and parallel fiber-optical links, and new applications are continuously arising. READ MORE

  3. 3. Electromagnetic simulation and design of etched diffraction grating demultiplexers

    University dissertation from Stockholm : KTH

    Author : Jun Song; KTH.; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; etched diffraction grating; wavelength division multiplexing; passive devices; diffraction grating; planar waveguide devices; DWDM; optical communication.; TECHNOLOGY Electrical engineering; electronics and photonics Photonics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Fotonik;

    Abstract : Among various planar lightwave circuits for multiplexing/demultiplexing in an optical communication system, etched diffraction gratings (EDGs) have shown great potential due to their compactness and high spectral finesse. Conventional numerical methods for grating simulation cannot be used to simulate an EDG demultiplexer of large size (in terms of the wavelength). READ MORE

  4. 4. Optical Guiding and Feedback in Gallium Nitride Based Vertical Cavity Surface Emitting Lasers

    University dissertation from Stockholm : KTH

    Author : Seyed Ehsan Hashemi; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; antiguiding; vertical-cavity surface-emitting laser; gallium nitride laser; TiO2 high contrast grating;

    Abstract : The gallium-nitride (GaN) semiconductor material has been the core of the revolutionary breakthroughs during the last two decades in the lighting industry, by enabling manufacturing of efficient blue light emitting diodes (LEDs), for which the 2014 Nobel prize in physics was awarded. The GaN technology has further led to violet edge-emitting lasers (EELs), enabling the Blu-ray disk technology, and also to the commercialization of directly green emitting EELs. READ MORE

  5. 5. Non-linear mid-infrared laser techniques for combustion diagnostics

    University dissertation from Stockholm : KTH

    Author : Anna-Lena Sahlberg; Lund University.; Lunds universitet.; [2016-06-10]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Combustion diagnostics; non-linear; mid-infrared; degenerate four-wave mixing; laser-induced thermal grating spectroscopy; polarization spectroscopy;

    Abstract : .... READ MORE