Prof. Dr. Karsten Buse
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filed under:
Technik
Contact
Department of Microsystems Engineering (IMTEK)
Optical Systems
Georges-Köhler-Allee 102, 79110 Freiburg
Phone: +49(0) 761 / 8857-111
Fax: +49(0) 761 / 203-73211
Email: karsten.buse@ipm.fraunhofer.de
Website: https://www.imtek.de/professuren/optische-systeme
Membership
BrainLinks-BrainTools
BIOSS Centre for Biological Signalling Studies
Fields
- Whispering gallery resonators
- Description: With the help of an optical resonator, the power of irradiated laser light can be multiplied, thus increasing the efficiency of non-linear optical processes. The following applies here: the smaller the resonator losses, the greater the power increase. The lowest losses are achieved with whispering cavity resonators, as they are based on total reflection. From these special cavities, we develop efficient non-linear optical components and highly sensitive sensors.
- Microstructuring of optically nonlinear materials
- Description: The efficiency of nonlinear optical processes is maximum when the interacting light waves propagate with the same phase velocity. This condition can only be fulfilled without additional effort for certain wavelength combinations. Targeted microstructuring of the non-linear optical material helps here. In principle, it can be used to compensate for any phase velocity difference. We develop and optimise structuring methods. For example, electric fields and ultraviolet laser light are used.
- Optical parametric oscillators
- Description: In an optical parametric oscillator (OPO), an irradiated pump wave is converted into two new waves. In this non-linear optical process, light of any frequency can in principle be generated as long as it is smaller than that of the pump wave. Therefore, an OPO is far superior to a laser in terms of tunability. In our working group, we develop OPOs for the near and mid-infrared as well as for the terahertz range.