Sökning: "BRAGG GRATINGS"
Visar resultat 11 - 15 av 32 avhandlingar innehållade orden BRAGG GRATINGS.
11. Integrated Nanophotonic Devices in Lithium Niobate
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
12. Photonic wavelength selective devices based on multi-mode interference waveguides
Sammanfattning : .... LÄS MER
13. Fibre Bragg Grating Components for Filtering, Switching and Lasing
Sammanfattning : Fibre Bragg gratings (FBGs) are key components for a vast number of applications in optical communication systems, microwave photonics systems, and optical sensors, etc. The main topic of this thesis is fibre Bragg grating fabrication and applications in direct microwave optical filtering, high speed switching and switchable dual-wavelength fibre lasers. LÄS MER
14. Compact solid-state lasers in the near-infrard and visible spectral range
Sammanfattning : The subject of this thesis is the exploration of new concepts for compact solid-state lasers in the visible and near-infrared spectral range using new components such as volume Bragg gratings for wavelength stabilisation and wavelength tuning. Also single-walled carbon nanotubes for mode-locking and Q-switching of lasers have been studied. LÄS MER
15. Laser processing of Silica based glass
Sammanfattning : The main topic of this thesis work is photosensitivity and photo-structuring of optical fibers and bulk glass. Although research in the field of photosensitivity in glass and optical fibers has been ongoing for more than three decades, the underlying mechanisms are still not well understood. LÄS MER