Sökning: "Grating"
Visar resultat 21 - 25 av 115 avhandlingar innehållade ordet Grating.
21. Diffractive Optics Design
Sammanfattning : Diffractive optical elements (kinoforms) change the way light propagates, and can perform very complex tasks. They can split an incident beam into any number of outgoing, and possibly focused, beams (fan-out). LÄS MER
22. Optical properties and helicity in liquid crystals
Sammanfattning : .... LÄS MER
23. Tandem optical parametric oscillators using volume Bragg grating spectral control
Sammanfattning : This thesis describes research on near degenerate quasi phase-matched opticalparametric oscillators (OPO) where volume Bragg gratings (VBG) are used toproduce narrow oscillation bandwidth. These OPOs are then used to pump a secondOPO to generate mid-infrared radiation. The atmospheric transmission windows in the 3. LÄS MER
24. Dynamic and Static Diffractive Optics - some Examples
Sammanfattning : Diffractive optics is a modern branch of optics, that exploits microstructures to manipulate the propagation of light. Fast computers and the progress in manufacturing technique of microelectronics have made possible a rapid development of diffractive optics during the past 10 years. LÄS MER
25. Grating-Coupled Surface-Emitters --- Highly Directional Outcouplers and Spatially Coherent Lasers
Sammanfattning : This thesis deals with grating-coupled surface-emitting semiconductor lasers. The work is part of a larger effort that aims at developing semiconductor lasers with built-in beam-forming elements, which eliminate the need for external micro-optics. LÄS MER