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We report on efficient single-pass, high-power second-harmonic generation in a periodically poled MgO-doped LiNbO3 planar waveguide using a distributed Bragg reflector tapered diode laser as a pump source. A coupling efficiency into the planar waveguide of 73% was realized, and 1.07 W of visible laser light at 532 nm was generated. Corresponding optical and electro-optical conversion efficiencies of 26% and 8.4%, respectively, were achieved. Good agreement between the experimental data and the theoretical predictions was observed. 相似文献
53.
A finite element in an Archimedean vector lattice is called self-majorizing if its modulus is a majorant. Such elements exist in many vector lattices and naturally occur in different contexts. They are also known as semi-order units as the modulus of a self-majorizing element is an order unit in the band generated by the element. In this paper the properties of self-majorizing elements are studied systematically, and the relations between the sets of finite, totally finite and self-majorizing elements of a vector lattice are provided. In a Banach lattice an element \(\varphi \) is self-majorizing , if and only if the ideal and the band both generated by \(\varphi \) coincide. 相似文献
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Characterization and functionalization of cellulose microbeads for extracorporeal blood purification
Marion Ettenauer Fritz Loth Katrin Thümmler Steffen Fischer Viktoria Weber Dieter Falkenhagen 《Cellulose (London, England)》2011,18(5):1257-1263
In the frame of this work, cellulose microbeads with an average particle size of 2.3 μm were characterized with respect to
porosity using a batch solute exclusion method and two groups of model substances, namely proteins and polystyrene sulfonates.
The pores of the microbeads were almost completely accessible to proteins with Stokes radii below 2.5 nm. More than 60% of
the pores were accessible to albumin, which is relevant for the application in blood purification, since many target substances
are albumin bound. Activation of the microbeads with increasing amounts of sodium metaperiodate yielded matrices with dialdehyde
contents between 100 and 1,000 μmol/g. The activated beads were well suited for the covalent attachment of functional ligands,
such as antibodies. Immobilization of antibodies against the pro-inflammatory cytokine TNF-α resulted in efficient TNF-α adsorbents
which possess application potential in extracorporeal blood purification, e.g. for the modulation of cytokine levels as supportive
therapy for sepsis and other inflammatory disorders. 相似文献
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Katrin Schumacher 《Czechoslovak Mathematical Journal》2009,59(3):637-648
Given a domain Ω of class C
k,1, k ∈ ℕ, we construct a chart that maps normals to the boundary of the half space to normals to the boundary of in the sense
that (∂/∂x
n
)α(x′, 0) = − N(x′) and that still is of class C
k,1. As an application we prove the existence of a continuous extension operator for all normal derivatives of order 0 to k on domains of class C
k,1. The construction of this operator is performed in weighted function spaces where the weight function is taken from the class
of Muckenhoupt weights. 相似文献