Search for dissertations about: "semiconductor lasers"
Showing result 21 - 25 of 72 swedish dissertations containing the words semiconductor lasers.
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21. Gallium arsenide based buried heterostructure laser diodes with aluminium-free semi-insulating materials regrowth
Abstract : Semiconductor lasers based on gallium arsenide and relatedmaterials are widely used in applications such as opticalcommunication systems, sensing, compact disc players, distancemeasurement, etc. The performance of these lasers can beimproved using a buried heterostructure offering lateralcarrier and optical confinement. READ MORE
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22. Metamorphic Heterostructures and Lasers on GaAs
Abstract : The objective of this thesis is to demonstrate the metamorphic growth of heterostructure lasers on GaAs substrates. Many heterostructure devices have their performance limited by the need to grow on lattice-matched substrates. READ MORE
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23. Modeling Quantum Cascade Lasers : The Challenge of Infra-Red Devices
Abstract : We live in a time of rapid scientific and technological advancement. People liv- ing 100 years ago could never dream of inventions like those having completely changed our way of life, and our perception of the world; computers, mobile phones, the Internet, space travel, unraveling the mysteries of the early universe and distant galaxies, and our insight into the microscopic world of quantum phe- nomena. READ MORE
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24. High Power, Long Wavelength Semiconductor Disk Lasers for Continuous and Mode-Locked Operation
Abstract : The semiconductor disk laser has recentlyemerged as an attractive alternative to bulky and power consuming gas and solid state lasers. It offers compact, powerful and efficient devices with W level output power and beam properties earlier not achieved with semiconductor lasers. READ MORE
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25. Fabrication and Characterization of Integration Compatible Semiconductor Lasers
Abstract : This thesis deals with the fabrication and characterization of integration compatible semiconductor lasers. An extensive investigation of electron-beam lithography (EBL) and chemically assisted ion beam etching (CAIBE) for the fabrication of vertical ultra- high quality facets in GaAs, as well as a systematic characterization of grating coupled surface emitting lasers is presented. READ MORE