Application deadline January 31, 2007
The Photonics Laboratory at Chalmers University of Technology, Göteborg, Sweden, has a PhD student position open for work on optically pumped semiconductor disk lasers. The research area is described below.
Optically pumped semiconductor disk lasers
Optically pumped semiconductor disk lasers (OP-SDLs) produce high optical power with excellent beam quality. A semiconductor chip with an integrated mirror is pumped with another laser to provide gain. An external mirror, used to form the optical resonator, defines the modal characteristics of the laser. With proper resonator dimensions and alignment, an output power of several W's can be produced in a circular, diffraction limited beam. The external resonator also allows for additional elements in the cavity to enable e.g. spectral filtering, wavelength tuning, mode-locking for short pulse generation, and wavelength conversion using nonlinear optical techniques. Because of superior performance characteristics and the wavelength versatility of semiconductors, it is likely that OP-SDLs will be applied to many of the tasks for which diode-pumped solid state lasers are currently used.
At Chalmers we have developed InP-based OP-SDLs with an emission wavelength of 1.55 µm for applications in e.g. optical communication, sampling, clocking, and range finding. We have developed new techniques for thermal management and spectral filtering to enable the development of high power OP-SDLs with excellent optical properties. We have also developed mode-locked OP-SDLs using saturable absorbers in the cavity for the generation of short optical pulses at high repetition rates.
With continued support from the Swedish Research Council (VR) we will extend our research on OP-SDLs to other semiconductor materials and emission wavelengths, to enable tunability over an extended wavelength range, to enable the generation of very short optical pulses, and to implement various nonlinear optical techniques for wavelength conversion.
We seek a PhD student with a Master of Science degree in Electrical Engineering or Applied Physics (or an equivalent degree), preferably with a sound knowledge in electromagnetics, optics/photonics, and solid state physics. Experience in any of the areas of semiconductors, optics, and/or opto-mechanical assembly would be an important merit. You should be a good team player and have an ability to take initiative.
For further information, please contact:
Professor Anders Larsson, +46-31-7721593, +46-703-088626, anders.larsson@ chalmers. se
Welcome with your application, which may be submitted by e-mail, containing: application letter, CV, exam with grades, contact details of at least two references and your MSc thesis.
Send your expression of interest quoting reference number 131/2006, by 2007-01-31 to:
Registrar
Chalmers University of Technology
SE-412 96 Göteborg, Sweden
Phone exch: +46 31 772 10 00
Fax registrar: +46 31 772 49 22
e-mail: registrator@ chalmers. se
Trade union representatives
Jan Lindér SACO, Monia Orrbacke TCO, Ralf Berndtsson SEKO
http://chalmersnyhe ter.chalmers. se/chalmers03/ english/eng_ vacanciesarticle .jsp?article= 8266
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