New results on characterization of highly transparent C-modification Lu2O3nanocrystalline ceramics: room-temperature tunable CW laser action of Yb3+ions under LD-pumping and the propagation kinetics of non-equilibrium acoustic phonons

2006 ◽  
Vol 3 (8) ◽  
pp. 375-379 ◽  
Author(s):  
A A Kaminskii ◽  
S N Bagayev ◽  
K Ueda ◽  
K Takaichi ◽  
A Shirakawa ◽  
...  
Keyword(s):  
Room Temperature ◽  
Laser Action ◽  
Acoustic Phonons ◽  
Cw Laser ◽  
Kinetics Of ◽  
Non Equilibrium

Tunable cw laser action of Er3+ in double sensitized fluoroaluminate glass at room temperature

1989 ◽  
Author(s):  
E. Heumann ◽  
M. Ledig ◽  
D. Ehrt ◽  
W. Seeber ◽  
E. W. Duczynski ◽  
...  
Keyword(s):  
Room Temperature ◽  
Laser Action ◽  
Cw Laser

Tunable room-temperature cw laser action in Cr3+: GdScGa-Garnet

1983 ◽  
Vol 30 (3) ◽  
pp. 117-120 ◽  
Author(s):  
B. Struve ◽  
G. Huber ◽  
V. V. Laptev ◽  
I. A. Shcherbakov ◽  
E. V. Zharikov
Keyword(s):  
Room Temperature ◽  
Laser Action ◽  
Cw Laser

cw laser action of Er3+in double sensitized fluoroaluminate glass at room temperature

1988 ◽  
Vol 52 (4) ◽  
pp. 255-256 ◽  
Author(s):  
E. Heumann ◽  
M. Ledig ◽  
D. Ehrt ◽  
W. Seeber ◽  
E. W. Duczynski ◽  
...  
Keyword(s):  
Room Temperature ◽  
Laser Action ◽  
Cw Laser

Room temperature cw laser action of Y2SiO5:Yb3+, Er3+ at 1.57 μm

1994 ◽  
Vol 107 (1-2) ◽  
pp. 61-64 ◽  
Author(s):  
C. Li ◽  
R. Moncorgé ◽  
J.C. Souriau ◽  
C. Borel ◽  
Ch. Wyon
Keyword(s):  
Room Temperature ◽  
Laser Action ◽  
Cw Laser

Characterization of Fast Diffusing Charged Defects in Semiconductors

1995 ◽  
Vol 378 ◽  
Author(s):  
T. Heiser ◽  
A. Zamouche ◽  
A. Mesli
Keyword(s):  
Room Temperature ◽  
Charge Movement ◽  
Capacitance Change ◽  
Ion Drift ◽  
Defect Reactions ◽  
Defects In Semiconductors ◽  
Charged Defects ◽  
Kinetics Of ◽  
Good Agreement

AbstractA novel technique is introduced to study fast diffusing charged defects in semiconductors. It is based on the capacitance change induced by ion drift in a reverse biased Schottky barrier. It is shown that such charge movement yields exponential capacitance transients, which contain information about the defect concentration and mobility. The method is checked on Li-diffused samples, where the extracted diffusion coefficient are in good agreement with literature data. It is next applied to interstitial copper (Cui) in silicon. In the proposed experiment Cui gives rise to a well defined signal which enables us to investigate near room temperature defect reactions involving Cui. The diffusion data extracted from copper diffused and quenched silicon samples establishes the origin of the signal. Near room temperature precipitation kinetics of Cui are studied and energy barriers are extracted.

Tunable room-temperature cw laser action in Cr3+: GdScAl-garnet

1984 ◽  
Vol 50 (1) ◽  
pp. 45-48 ◽  
Author(s):  
J. Drube ◽  
B. Struve ◽  
G. Huber
Keyword(s):  
Room Temperature ◽  
Laser Action ◽  
Cw Laser

Irradiation behavior of pyrolytic silicon carbide

1983 ◽  
Vol 41 ◽  
pp. 72-73
Author(s):  
R. J. Lauf
Keyword(s):  
Silicon Carbide ◽  
Fission Products ◽  
Thermodynamics And Kinetics ◽  
Neutron Fluences ◽  
Fuel Particles ◽  
Sic Coatings ◽  
Irradiation Behavior ◽  
Kinetics Of ◽  
Htgr Fuel

Fuel particles for the High-Temperature Gas-Cooled Reactor (HTGR) contain a layer of pyrolytic silicon carbide to act as a miniature pressure vessel and primary fission product barrier. Optimization of the SiC with respect to fuel performance involves four areas of study: (a) characterization of as-deposited SiC coatings; (b) thermodynamics and kinetics of chemical reactions between SiC and fission products; (c) irradiation behavior of SiC in the absence of fission products; and (d) combined effects of irradiation and fission products. This paper reports the behavior of SiC deposited on inert microspheres and irradiated to fast neutron fluences typical of HTGR fuel at end-of-life.

Characterization of intergranular cuprous oxide in polycrystalline YBa2Cu3O7-x

1988 ◽  
Vol 46 ◽  
pp. 880-881
Author(s):  
Bradley L. Thiel ◽  
Chan Han R. P. ◽  
Kurosky L. C. Hutter ◽  
I. A. Aksay ◽  
Mehmet Sarikaya
Keyword(s):  
Grain Boundary ◽  
Cuprous Oxide ◽  
Room Temperature ◽  
Boundary Phase ◽  
Spectroscopic Techniques ◽  
Transition Width ◽  
Practical Applications ◽  
Thin Foils ◽  
Superconducting Oxides

The identification of extraneous phases is important in understanding of high Tc superconducting oxides. The spectroscopic techniques commonly used in determining the origin of superconductivity (such as RAMAN, XPS, AES, and EXAFS) are surface-sensitive. Hence a grain boundary phase several nanometers thick could produce irrelevant spectroscopic results and cause erroneous conclusions. The intergranular phases present a major technological consideration for practical applications. In this communication we report the identification of a Cu2O grain boundary phase which forms during the sintering of YBa2Cu3O7-x (1:2:3 compound).Samples are prepared using a mixture of Y2O3. CuO, and BaO2 powders dispersed in ethanol for complete mixing. The pellets pressed at 20,000 psi are heated to 950°C at a rate of 5°C per min, held for 1 hr, and cooled at 1°C per min to room temperature. The samples show a Tc of 91K with a transition width of 2K. In order to prevent damage, a low temperature stage is used in milling to prepare thin foils which are then observed, using a liquid nitrogen holder, in a Philips 430T at 300 kV.

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