Sökning: "bragg"

Visar resultat 11 - 15 av 74 avhandlingar innehållade ordet bragg.

  1. 11. Fabrication and Charaterisation of Photonic Integrated Circuits

    Författare :Harendra Fernando; KTH; []
    Nyckelord :Plasma Enhanced Chemical Vapour Deposition PECVD ; Reactive Ion Etching RIE ; Photosensitivity; Bragg-gratings; Optical Add-drop De Multiplexsers;

    Sammanfattning : The past few decades have seen an explosive increase ininformation transfer, fuelled by the enormous growth of theInternet, telecommunication applications, and mass mediasystems in general. Because of the very high bandwidthpotential promised by optical fibre communication technology,the area of all-optical networking has received a great amountof attention. LÄS MER

  3. 12. Integrated Nanophotonic Devices in Lithium Niobate

    Författare :Mohammad Amin Baghban; Katia Gallo; Fabrice Raineri; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lithium niobate LN ; LN-on-insulator; photonic integrated circuits; nonlinear optics; electro-optics; waveguides; propagation losses; Bragg gratings; grating couplers; polarization-insensitive; LN for life sciences; Fysik; Physics;

    Sammanfattning : Lithium niobate (LN) is a ferroelectric crystal offering a broad transparency spectrum, together with excellent electro-optic and nonlinear optical properties. Thanks to them, LN is setting the standard for quantum optics and telecommunications in critical applications such as ultrafast modulation and frequency conversion. LÄS MER

  4. 13. Photonic wavelength selective devices based on multi-mode interference waveguides

    Författare :Torsten Augustsson; KTH; []
    Nyckelord :add drop-multiplexing; bragg gratings; de multiplexing; multimode interference waveguides; planar lightwave circuits; silica on silicon;

    Sammanfattning : .... LÄS MER

  5. 14. Long-wavelength vertical-cavity lasers based on InP/GaInAsp bragg reflectors

    Författare :Stefan Rapp; KTH; []
    Nyckelord :;

    Sammanfattning : Vertical-cavity surface-emitting lasers (VCSELs) operatingat long wavelength (1.3-1.55µm) are of great interest asinexpensive, high-performance light sources for opticalcommunication systems. LÄS MER

  7. 15. All-fibre optical sensor system for chemical sensing based on fibre Bragg grating technology

    Författare :Adel Asseh; KTH; []
    Nyckelord :;

    Sammanfattning : This thesis deals with the realization of an all-fibresensor system for chemical sensing through the evanescentfield, based on fibre Bragg grating technology. The advantagesof all-fibre systems are most apparent for the potential userof the system. These systems are of small size, have highmobility, and require no precision alignment. LÄS MER