Sökning: "laser diodes"
Visar resultat 11 - 15 av 32 avhandlingar innehållade orden laser diodes.
11. Novel materials for Yb and Er-Yb doped microchip lasers
Sammanfattning : The objective of this thesis has been to investigate novel host material configurations for high-power end-pumped Er-Yb co-doped, or Yb doped microchip lasers and try to increase their performance. In Er-Yb co-doped systems, the main limitation is the thermal shortcomings of the phosphate glass host material. LÄS MER
12. Towards Novel AlGaN-Based Light Emitters
Sammanfattning : The unique properties of the AlGaN semiconductors make them a suitable choice for optoelectronic devices at both short and long wavelengths, based on interband and intersubband transitions, respectively. What sets AlGaN apart from other wide-bandgap semiconductors is the possibility to obtain both p- and n-type conductivity as well as the direct bandgap. LÄS MER
13. Concepts for compact solid-state lasers in the visible and UV
Sammanfattning : In many fields, scientific or industrial, optical devices that can be tailored in terms of spectral qualities and output power depending on the application in question are attractive. Nonlinear optics in combination with powerful laser sources provide a tool to achieve essentially any wavelength in the electromagnetic spectrum, and the advancement of material technology during the last decade has opened up new possibilities in terms of realising such devices. LÄS MER
14. Optical frequency modulated continuous wave (FMCW) range and velocity measurements
Sammanfattning : By using a tunable laser diode and fiber components small compact ranging and radial velocity measuring systems can be realized utilizing a frequency modulating continuous wave (FMCW) technique. The thesis start with an introduction that explains some basic theory behind laser diodes, photodiodes and different optical measuring techniques. LÄS MER
15. Compact diode-pumped solid-state lasers
Sammanfattning : Compact diode-pumped solid-state lasers (DPSSL) arecontinuously replacing traditional gas lasers as well asenabling completely new technology. However, compact and costefficient designs are required to satisfy end-user demands. Theaim of this thesis was therefore to investigate novel laserdesigns for given applications considering these demands. LÄS MER