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Juggling with light: Powerful second-order nonlinear optical effects in whispering gallery resonators

: Breunig, Ingo; Buse, Karsten

Fulltext urn:nbn:de:0011-n-5787714 (1.1 MByte PDF)
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Created on: 10.3.2020

Kudryashov, A.V. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Laser Resonators, Microresonators, and Beam Control XXII : 1-6 February 2020, San Francisco, California
Bellingham, WA: SPIE, 2020 (Proceedings of SPIE 11266)
Paper 1126609, 8 pp.
Conference "Laser Resonators, Microresonators, and Beam Control" <22, 2020, San Francisco/Calif.>
Conference Paper, Electronic Publication
Fraunhofer IPM ()
nonlinear optics; optical parametric oscillators; whispering gallery modes

Whispering gallery resonators made out of crystalline materials exhibiting second-order nonlinearities enable frequency mixing such as optical parametric oscillation with high efficiency at low optical input powers and are ideally suited to realize versatile and compact optical frequency converters. Recent achievements stimulate this field further: Frequency conversion not only at a single wavelength or with few wavelengths is possible, entire frequency combs can be transferred into different spectral domains, e.g., allowing the realization of frequency combs in spectral regions that are suitable for multicomponent analytics like the mid-infrared region. Furthermore, these resonators are also supposed to be the ideal host for cascaded nonlinearities allowing the build-up of frequency combs based on second-order nonlinearities. All this comes with new and better schemes to tune whispering gallery resonators, providing advanced opportunities to modulate the laser wavelengths with nanosecond speed employing the Pockels effect. Juggling with light: We will summarize in the presentation these recent achievements, demonstrating that in the field of whispering gallery resonators still many discoveries are ahead of us.