Search for dissertations about: "vcsel"

Showing result 21 - 25 of 42 swedish dissertations containing the word vcsel.

2. 21. Controlling the Optical Properties of Vertical-Cavity Surface-Emitting Lasers

   Author : Josip Vukusic; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : The insatiable demand for higher bandwidth in communication systems has led to the optical fiber trickling its way down to the consumer, gradually replacing the conventional copper cable. This trend is expected to continue, rendering these systems highly cost sensitive and therefore spurring the development of new breeds of semiconductor lasers, such as the vertical-cavity surface-emitting laser(VCSEL). READ MORE

4. 22. Optical Guiding and Feedback Structures in GaN-Based Vertical-Cavity Surface-Emitting Lasers

   Author : Seyed Ehsan Hashemi; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : The Vertical-Cavity Surface-Emitting Laser (VCSEL) made from GaAs-based materials is an established infrared light source, and is produced in large volumes for short-distance optical links, computer mice, and thermal processing systems. A wide range of applications, such as high-resolution printing, general lighting, and biomedical diagnosis and treatment could benefit from using a VCSEL with blue or ultraviolet emission. READ MORE

5. 23. Quasi-Single Mode VCSELs for Longer-Reach Optical Interconnects

   Author : Erik Haglund; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; quasi-single mode; oxide aperture; mode filter; vertical-cavity surface-emitting laser; high-speed modulation; mode control; spectral width;

   Abstract : The vertical-cavity surface-emitting laser (VCSEL) is the standard light source in optical interconnects connecting racks in supercomputers and datacenters hosting services such as online data sharing, storage and processing. VCSELs have numerous advantages such as low power consumption, fast direct modulation at low currents, circular output beam for efficient fiber coupling and low-cost fabrication. READ MORE

6. 24. VCSELs for High-Speed, Long-Reach, and Wavelength-Multiplexed Optical Interconnects

   Author : Erik Haglund; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; mode filter; high-contrast grating; oxide aperture; high-speed modulation; wavelength control; spectral width; vertical-cavity surface-emitting laser; optical interconnect; quasi-single-mode;

   Abstract : The vertical-cavity surface-emitting laser (VCSEL) is the standard light source in short-reach fiber-optic links in datacenters and supercomputers. These systems use an enormous number of links, making cost and energy efficiency pressing issues. READ MORE

7. 25. Transverse Mode and Beam Control in Vertical-Cavity Surface-Emitting Lasers

   Author : Hans Martinsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : In recent years, the demand for high performance low cost optical interconnect components has accelerated. An promising solution has been found with the vertical-cavity surface-emitting laser (VCSEL). READ MORE