Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Karsten Moldenhauer"'
Autor:
Karsten Moldenhauer, Jürgen Czarske, Jasper Möbius, Hans Kurt Tönshoff, Thomas Muller-Wirts, Thorsten Razik
Publikováno v:
tm - Technisches Messen. 71:623-633
Konventionelle optische Sensoren nutzen Messeffekte außerhalb der Lichtquelle. Bei dem vorgestellten Lasersensor wird demgegenüber das Messobjekt in einen Fabry–Perot-Laserresonator integriert. Dabei ist die technische Oberfläche des Messobjekte
Autor:
Harald Schnatz, Gesine Grosche, Christian Lisdat, Wolfgang Ertmer, Burghard Lipphardt, Tanja E. Mehlstäubler, J. Friebe, M. Riedmann, N. Rehbein, Ernst M. Rasel, A. Pape, Karsten Moldenhauer
Publikováno v:
Physical Review A. 78
We report on a frequency measurement of the $(3{s}^{2})^{1}S_{0}\ensuremath{\rightarrow}(3s3p)^{3}P_{1}$ clock transition of $^{24}\mathrm{Mg}$ on a thermal atomic beam. The intercombination transition has been referenced to a portable primary Cs fre
Autor:
J. Friebe, N. Rehbein, Karsten Moldenhauer, Ernst M. Rasel, Tanja E. Mehlstäubler, Wolfgang Ertmer, M. Riedmann
Publikováno v:
Physical Review A. 77
Temperatures below the Doppler limit of $1.9\phantom{\rule{0.3em}{0ex}}\mathrm{mK}$ have been observed in magnesium. The strong cooling transition was modified by a coherent two-color excitation exploiting the longer lifetime of an upper level. We de
Autor:
Volker Michels, J. Keupp, Karsten Moldenhauer, V. G. Pal’chikov, Charlotte Froese Fischer, N. Rehbein, Ernst M. Rasel, Andrei Derevianko, A. Douillet, Tanja E. Mehlstäubler, Georgio Tachiev, Sergey G. Porsev, Wolfgang Ertmer
Publikováno v:
Physical Review A. 76
Doppler cooling on narrow transitions has become a crucial technique for preparing ultracold samples of alkaline-earth-metal and alkaline-earth-metal-like atoms. For lighter species, such as calcium and magnesium, this technique relies on artificial
Autor:
J. Friebe, A. Voskrebenzev, A. Pape, Wolfgang Ertmer, Karsten Moldenhauer, N. Rehbein, Ernst M. Rasel, M. Riedmann, Tanja E. Mehlstäubler
Publikováno v:
2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference.
Standard sub-Doppler cooling methods are not applicable in bosonic magnesium due to the non-degenerate ground state. However, the Doppler limit can be surpassed by coupling the excited state of the cooling transition to the level 1D2 and cooling via
Autor:
Wolfgang Ertmer, Gesine Grosche, Burghard Lipphardt, Harald Schnatz, J. Friebe, Ernst M. Rasel, Karsten Moldenhauer, M. Riedmann, Tanja E. Mehlstäubler
Publikováno v:
2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum.
Summary form only given. We investigated a novel method which is based on a coherent two photon-process which provides higher velocity selectivity. The method extends standard Doppler cooling based on the transition 31S0 rarr 31P1 by coupling the exc
Autor:
Jean Jacques Zondy, Karsten Moldenhauer, Wolfgang Ertmer, Ernst M. Rasel, L. I. Isaenko, J. Friebe, Alexander P. Yelisseyev
Publikováno v:
CLEO/Europe. 2005 Conference on Lasers and Electro-Optics Europe, 2005..
This paper investigates the commercially available nonlinear material, BBO samples for deep-UV frequency generation. This material stands as a promising candidate for monolithic walkoff-compensating periodic structures that use an optically-contacted
Autor:
Alexander P. Yelisseyev, Ernst M. Rasel, Ludmila I. Isaenko, J. Friebe, Jean Jacques Zondy, Wolfgang Ertmer, Karsten Moldenhauer
The generation of watt-level cw narrow-linewidth sources at specific deep UV wavelengths corresponding to atomic cooling transitions usually employs external cavity-enhanced second-harmonic generation (SHG) of moderate-power visible lasers in birefri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19ed4e2873ead2bf3d972813277472a0
http://arxiv.org/abs/physics/0512190
http://arxiv.org/abs/physics/0512190
Publikováno v:
Applied optics. 44(25)
A novel laser sensor for position measurements of technical solid-state surfaces is proposed. An external Fabry-Perot laser cavity is assembled by use of an antireflection-coated laser diode together with the technical surface. Mode locking results f
Publikováno v:
Optical Metrology in Production Engineering.
A novel principle for absolute position measurements of rough surfaces is presented. A measurement object with a rough surface acts as an external reflector for an antireflection coated laser diode. Determining the longitudinal mode spacing yields th