نتایج جستجو برای: ytterbium compounds

تعداد نتایج: 227910  

Journal: :Chemical communications 2011
Zhen-Xing Li Fu-Bo Shi Tao Zhang Hao-Shuai Wu Ling-Dong Sun Chun-Hua Yan

An effective synthetic strategy is demonstrated for preparing highly ordered crystallized mesoporous TiO(2) by introducing rare earth in the synthesis process; the obtained product exhibits near-infrared photocatalytic activity.

Journal: :Optics express 2004
Alexandra Rapaport Janet Milliez Michael Bass Arlete Cassanho Hans Jenssen

Pump pulse duration is shown to determine the maximum efficiency of the up conversion process in ytterbium, thulium co-doped fluoride crystals through its role in determining the emitter temperature reached. We show that up-conversion efficiencies should only be measured when using the same pumping conditions as would be used in a proposed application and that thermal management of the up conve...

Journal: :Optics express 2014
Katrin Sarah Wentsch Birgit Weichelt Stefan Günster Frederic Druon Patrick Georges Marwan Abdou Ahmed Thomas Graf

We present Ytterbium-doped CaF2 as a laser active material with good prospects for high-power operation in thin-disk laser configuration owing to its favorable thermal properties. Thanks to its broad emission bandwidth the material is also suitable for the generation of ultra-short pulses. The properties of the crystal as well as the challenges related to the coating, polishing, mounting and ha...

Journal: :Journal of biomedical optics 2010
Thomas Aabo Ivan R Perch-Nielsen Jeppe Seidelin Dam Darwin Z Palima Henrik Siegumfeldt Jesper Glückstad Nils Arneborg

The effect of a 1070-nm continuous and pulsed wave ytterbium fiber laser on the growth of Saccharomyces cerevisiae single cells is investigated over a time span of 4 to 5 h. The cells are subjected to optical traps consisting of two counterpropagating plane wave beams with a uniform flux along the x, y axis. Even at the lowest continuous power investigated-i.e., 0.7 mW-the growth of S. cerevisi...

Journal: :Physical review letters 2014
K Beloy N Hinkley N B Phillips J A Sherman M Schioppo J Lehman A Feldman L M Hanssen C W Oates A D Ludlow

The Stark shift due to blackbody radiation (BBR) is the key factor limiting the performance of many atomic frequency standards, with the BBR environment inside the clock apparatus being difficult to characterize at a high level of precision. Here we demonstrate an in-vacuum radiation shield that furnishes a uniform, well-characterized BBR environment for the atoms in an ytterbium optical lattic...

Journal: :Optics letters 1978
P K Carroll E T Kennedy G O'Sullivan

The spectra of plasmas produced by focusing the output of a Q-switched ruby laser (output I J) on the rare-earth metals have been studied. From samarium (Z = 62) to ytterbium (Z = 70), strong quasi-uniform continua are emitted in the wavelength range 40-2000 A. Line emission from the target elements is absent over most of this wavelength region, particularly below about 600 A. The use of these ...

Journal: :Optics letters 2012
Lei Zhang Jinmeng Hu Jianhua Wang Yan Feng

We report on a tunable all-fiber dissipative-soliton laser with a multimode interference filter that consists of a multimode fiber spliced between two single-mode fibers. By carefully selecting the fiber parameters, a filter with a central wavelength at 1032 nm and a bandwidth of 7.6 nm is constructed and used for spectral filtering in an all-normal-dispersion mode-locked ytterbium-doped fiber ...

Journal: :New Journal of Physics 2021

An experiment based on a trapped ytterbium ion validates the inertial theorem for SU(2) algebra. The qubit is encoded within hyperfine states of atom and controlled by RF fields. generates analytical solutions non-adiabatically driven systems that are 'accelerated' slowly, bridging gap between sudden adiabatic limits. These shown to be stable small deviations, both experimentally theoretically....

Journal: :Journal of Physics: Conference Series 2009

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