scispace - formally typeset
A

Andreas Tünnermann

Researcher at Fraunhofer Society

Publications -  1757
Citations -  48543

Andreas Tünnermann is an academic researcher from Fraunhofer Society. The author has contributed to research in topics: Fiber laser & Laser. The author has an hindex of 97, co-authored 1738 publications receiving 43757 citations. Previous affiliations of Andreas Tünnermann include Schiller International University & University of Jena.

Papers
More filters
Proceedings ArticleDOI

Waveguide Image-Slicers for ultrahigh resolution spectroscopy

Erik Beckert, +5 more
- 23 Jul 2008 - 
TL;DR: In this article, waveguide image-slicer prototypes with resolutions up to 310.000 for the fiber fed PEPSI echelle spectrograph at the LBT and single waveguide thicknesses of down to 30 μm have been manufactured.
Journal ArticleDOI

Thermal nonlinear effects in hybrid silica/polymer microdisks

Carsten Schmidt, +5 more
- 15 Oct 2010 - 
TL;DR: A full compensation of eigen frequency shift, caused by thermal nonlinearity, has been demonstrated experimentally and can be explained by the different thermorefractive coefficients of silica and polymer.
Proceedings ArticleDOI

Recent progress in the understanding of mode instabilities

Cesar Jauregui, +7 more
- 04 Mar 2015 - 
TL;DR: In this article, the influence of photodarking on the mode instability threshold and its behavior has been reviewed, with particular emphasis on the recently established influence on the effect of photoderandomization on mode instability.
Journal ArticleDOI

Mechanical losses in low loss materials studied by Cryogenic Resonant Acoustic spectroscopy of bulk materials (CRA spectroscopy)

A. Zimmer, +8 more
- 13 Sep 2007 - 
TL;DR: A high-precision cryogenic setup with the ability to measure Q factors of at least 10(9) offers new potential for analyzing relaxation processes in solids and for correlating mode shape and relaxation strength.
Proceedings ArticleDOI

Refractive beam shaping elements

Lars-Christian Wittig, +3 more
TL;DR: The well-known advantages of refractive micro optical elements-high efficiency and low wavelength aberration-can be used for microlenses as well as in beam shaping applications, such as producing different top-hat intensity distributions as mentioned in this paper.