Sökning: "vertical coupling scheme"

Hittade 5 avhandlingar innehållade orden vertical coupling scheme.

  1. 1. Study on electroabsorption modulators and grating couplers for optical interconnects

    Detta är en avhandling från Stockholm : KTH

    Författare :Yongbo Tang; KTH.; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Photonic integrated circuit; optical interconnect; transmission line; traveling-wave; electro-absorption modulator; hybrid silicon evanescent platform; grating coupler; vertical coupling scheme; optical antenna; lag effect; polarization beam splitter; TECHNOLOGY Electrical engineering; electronics and photonics Photonics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Fotonik; SRA - ICT; SRA - Informations- och kommunikationsteknik;

    Sammanfattning : Decades of efforts have pushed the replacement of electrical interconnects by optical links to the interconnects between computers, racks and circuit boards. It may be expected that optical solutions will further be used for inter-chip and intra-chip interconnects with potential benefits in bandwidth, capacity, delay, power consumption and crosstalk. LÄS MER

  2. 2. Investigation of New Concepts and Solutions for Silicon Nanophotonics

    Detta är en avhandling från Stockholm : KTH

    Författare :Zhechao Wang; KTH.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Planar integrated circuit; silicon photonics; slot waveguide; finite-difference time-domain; waveguide grating coupler; ring resonator; polarization diversity scheme; polarization beam splitter; polarization rotator; hybrid silicon laser; epitaxial lateral overgrowth; chemical-mechanical polishing.; NATURAL SCIENCES Physics Other physics Optics; NATURVETENSKAP Fysik Övrig fysik Optik;

    Sammanfattning : Nowadays, silicon photonics is a widely studied research topic. Its high-index-contrast and compatibility with the complementary metal-oxide-semiconductor technology make it a promising platform for low cost high density integration. LÄS MER

  3. 3. Emittance related topics for fourth generation storage ring light sources

    Detta är en avhandling från Lund University, Faculty of Science, Department of Accelerator Physics, MAX IV Laboratory

    Författare :Jonas Breunlin; Lunds universitet.; Lund University.; [2016-09]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ultralow emittance; Touschek lifetime; emittance tuning; Beam diagnostics; synchrotron radiation;

    Sammanfattning : Vi vet att laddade partiklar sänder ut elektromagnetisk strålning då de tvingas följa en krökt bana. Denna strålning kallas synkrotronstrålning, och upptäcktes i mitten av 1900-talet. Sedan dess har denna typ av strålning funnit tillämpningar inom flera forskningsområden såsom kemi, biologi, medicin och materialvetenskap. LÄS MER

  4. 4. Fabrication and Characterization of Photonic Crystals, Optical Metamaterials and Plasmonic Devices

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Jing Wang; KTH.; [2011]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Photonic crystals; metamaterials; plasmonics; TECHNOLOGY Electrical engineering; electronics and photonics Photonics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Fotonik; SRA - ICT; SRA - Informations- och kommunikationsteknik;

    Sammanfattning :  Nanophotonics is an emerging research field that deals with interaction between light and matter in a sub-micron length scale. Nanophotonic devices have found an increasing number of applications in many areas including optical communication, microscopy, sensing, and solar energy harvesting especially during the past two decades. LÄS MER

  5. 5. Low Cost Remote Antenna Units in CMOS for Fiber-fed Distributed MIMO Systems

    Detta är en avhandling från The Department of Electrical and Information Technology

    Författare :Waqas Ahmad; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2016-08-26]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Remote Antenna Unit; distributed MIMO systems; CMOS technology; power amplifier; linearization; CMOS photodiodes; transimpedance amplifier; radio over fiber; optical communication;

    Sammanfattning : Massive multiple input multiple output (MIMO) is a revolutionary communication technique, where large numbers of antennas are employed at the base stations to increase the spectral efficiency, reliability and data rate of the system. Moreover, in multi-user MIMO (MU-MIMO) multiple users can be served by the base stations on the same time-frequency resource. LÄS MER