scholarly journals Growth and Characterization of Ce-Doped Luag Single Crystal Fibers from Transparent Ceramics by Laser-Heated Pedestal Method

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1149
Author(s):  
Yun Dai ◽  
Zhonghan Zhang ◽  
Xibin Wang ◽  
Zhuowei Lu ◽  
Huamin Kou ◽  
...  
Keyword(s):  
Single Crystal ◽  
Pulse Height ◽  
High Energy ◽  
Potential Candidate ◽  
Particle Detectors ◽  
Potential Applications ◽  
Crystal Fibers ◽  
New Generation ◽  
Laser Heated

Scintillation single crystal fibers (SCFs) have great potential applications in the new generation of high-energy ray and particle detectors due to their morphological advantages. In this work; Ce:LuAG SCFs with a diameter of 1 mm were grown along the direction of [111] by laser-heated pedestal growth (LHPG) method using a transparent ceramic as the source rod; and a doping concentration was 0.1 at%, 0.3 at%, 1 at%, respectively. The effects of growth rate and annealing in air on the scintillation and optical properties of SCF are discussed in detail. The results of analyzing the absorption spectra; radioluminescence (RL) spectra; pulse-height spectra and fluorescence lifetime of SCFs show that the SCF maintains excellent scintillation performance while having a fiber structure. Therefore; Ce:LuAG SCF is a potential candidate material for detector.

Growth of Optical Quality Sapphire Single Crystal Fibers

1989 ◽  
Vol 172 ◽  
Author(s):  
Dieter H. Jundt ◽  
Martin. M. Fejer ◽  
Robert. L. Byer
Keyword(s):  
Single Crystal ◽  
Near Infrared ◽  
Growth Dynamics ◽  
Damage Threshold ◽  
Optical Quality ◽  
Potential Applications ◽  
Growth Method ◽  
Sapphire Single Crystal ◽  
Crystal Fibers ◽  
Laser Heated

AbstractVoid-free sapphire single crystal fibers with diameters of 110 μm and 60 μm and lengths of over 2 m have been grown by the laser-heated pedestal growth method. The growth dynamics of the floating zone was studied and shows the features expected from a simple theoretical model. Optical losses have a minimum of 0.5 dB/m in the near infrared at 1064 nm. An absorption band centered at 400 nm results in losses of up to 20 dB/m in the visible. The fibers have potential applications in high temperature thermometry and in delivery systems for laser surgery. Absorption losses of 0.88 dB/m with a damage threshold higher than 1.2 kJ/cm2 at 2936 nm made tissue ablation feasible with fibers several meters in length.

Preparation and Characterization of Polycrystalline and Single Crystal Gd Doped Barium Cerium Oxide

1995 ◽  
Vol 393 ◽  
Author(s):  
Dave West ◽  
S.M. Haile ◽  
R.S. Feigelson
Keyword(s):  
Electron Microscopy ◽  
Single Crystal ◽  
Conductivity Measurements ◽  
Ac Impedance Spectroscopy ◽  
X Ray ◽  
Transmission Electron ◽  
Crystal Fibers ◽  
Barium Cerium Oxide ◽  
Laser Heated

ABSTRACTPolycrystalline samples of BaCexGd1-x03 have been prepared with 0.10 < x < 0.20. X-ray powder diffraction indicates the samples contain only one crystalline phase for doping levels < 0.15. Transmission electron microscopy analyses on the 10% doped sample revealed no glassy phases in the intergranular regions. Single crystal fibers were prepared by Laser Heated Pedestal Growth (LHPG) from the polycrystalline samples. Fiber growth was non-conservative thus the single crystal quality was limited. Preliminary conductivity measurements on the polycrystalline samples using AC impedance spectroscopy are compared with literature data.

Laser heated pedestal growth and optical properties of Yb3+-doped LiNbO3 single crystal fibers

1995 ◽  
Vol 245 (6) ◽  
pp. 555-560 ◽  
Author(s):  
G. Foulon ◽  
M. Ferriol ◽  
A. Brenier ◽  
M.T. Cohen-Adad ◽  
G. Boulon
Keyword(s):  
Optical Properties ◽  
Single Crystal ◽  
Crystal Fibers ◽  
Laser Heated

scholarly journals Characterization of a single crystal diamond pixel detector in a high energy particle beam

2008 ◽  
Vol 3 (12) ◽  
pp. P12002-P12002 ◽  
Author(s):  
M Mathes ◽  
M Cristinziani ◽  
H Kagan ◽  
S Smith ◽  
W Trischuk ◽  
...  
Keyword(s):  
Single Crystal ◽  
Particle Beam ◽  
High Energy ◽  
High Energy Particle ◽  
Pixel Detector ◽  
Energy Particle ◽  
Single Crystal Diamond

Growth and characterization of LiF single-crystal fibers by the micro-pulling-down method

2004 ◽  
Vol 270 (1-2) ◽  
pp. 121-123 ◽  
Author(s):  
A.M.E. Santo ◽  
B.M. Epelbaum ◽  
S.P. Morato ◽  
N.D. Vieira ◽  
S.L. Baldochi
Keyword(s):  
Single Crystal ◽  
Crystal Fibers

Growth of Single Crystal Yig Fibers by the Laser Heated Pedestal Growth Method

1997 ◽  
Vol 481 ◽  
Author(s):  
HanJin Lim ◽  
R. C. DeMattei ◽  
R. S. Feigelson
Keyword(s):  
Single Crystal ◽  
Growth Rates ◽  
Decomposition Temperature ◽  
Molten Zone ◽  
Nominal Composition ◽  
Vis Spectroscopy ◽  
Growth Method ◽  
Crystal Fibers ◽  
Iron Garnet ◽  
Laser Heated

ABSTRACTYttrium iron garnet (YIG) single crystal fibers of nominal composition Y3Fe5O12 were grown by the laser heated pedestal growth (LHPG) technique, a miniaturized floated-zone process. YIG which melts incongruently, was grown at a temperature below the peritectic decomposition temperature under self-adjusting conditions even though it has very narrow solidification region according to the Y2O3-Fe2O3 phase diagram. YIG fibers in diameter ranges from 100 to 750 μm were grown at various growth rates and conditions, and analyzed by x-ray diffraction, electron microprobe, and IR-VIS spectroscopy. Infrared transparent YIG fibers were grown at rates below 12 mm/h in air. At these growth rates, yttrium orthoferrite and iron-oxide inclusions within the YIG fiber, which act as IR scattering centers, were significantly reduced. The transparency of the fibers was more dependent on the growth rate than the stability of the molten zone. Surface ridges containing an Fe-rich composition were observed at all growth rates. These were associated with molten zone instability.

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