Comparison of laser, optical and thermal properties of ceramic laser gain materials with single crystal materials

2004 ◽  
Author(s):  
G.J. Quarles ◽  
V.K. Castillo ◽  
M. Dubinskii ◽  
L.D. Merkle ◽  
J.R. Goff ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Single Crystal ◽  
Laser Gain ◽  
Ceramic Laser

Processing technology, laser, optical and thermal properties of ceramic laser gain materials

2005 ◽  
Author(s):  
Mark Dubinskii ◽  
Larry D. Merkle ◽  
John R. Goff ◽  
Gregory J. Quarles ◽  
Vida K. Castillo ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Processing Technology ◽  
Laser Gain ◽  
Ceramic Laser

Co-casting and optical characteristics of transparent segmented composite Er:YAG laser ceramics

2010 ◽  
Vol 25 (3) ◽  
pp. 476-483 ◽  
Author(s):  
Elizabeth R. Kupp ◽  
Gary L. Messing ◽  
Julie M. Anderson ◽  
Venkatraman Gopalan ◽  
John Q. Dumm ◽  
...  
Keyword(s):  
Er:Yag Laser ◽  
Casting Process ◽  
Composite Ceramic ◽  
Laser Operation ◽  
Lasing Wavelength ◽  
Laser Gain ◽  
Composite Rod ◽  
Ceramic Laser ◽  
Transparent Composite ◽  
First Time

A novel colloidal co-casting process was developed to fabricate laser quality, multisegment composite ceramic laser gain materials. The approach was demonstrated for a three segment transparent composite rod 62 mm long by 3 mm diameter consisting of undoped yttrium aluminus garnet (YAG), 0.25% Er:YAG, and 0.5% Er:YAG. The Er concentration profile in the composite has steep, controllable gradients at the segment interfaces, while maintaining constant dopant concentrations within each segment. The composite rod has 84% transmittance at 1645 nm (the lasing wavelength) with a scatter loss of 0.4% cm−1. Laser operation of such a composite Er:YAG ceramic rod was demonstrated for the first time, with nearly equivalent lasing behavior to an Er:YAG single crystal rod.

Synthese, Struktur und thermisches Verhalten von Thiophosphorsäuretriamid SP(NH2)3 [1] / Synthesis, Structure, and Thermal Behaviour of Phosphorothionic Triamide SP(ΝΗ2)3 [1]

1989 ◽  
Vol 44 (8) ◽  
pp. 942-945 ◽  
Author(s):  
Wolfgang Schnick
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Thermal Properties ◽  
Single Crystal ◽  
Melting Temperature ◽  
Intermolecular Hydrogen Bonding ◽  
X Ray ◽  
Hydrogen Bonding Interactions ◽  
Ray Methods ◽  
Single Bonds

Phosphorothionic triamide SP(NH2)3 is obtained by slow addition of SPCl3 dissolved in dry CH2Cl2 to a satured solution of NH3 in CH2Cl2 at —50°C. Ammonium chloride is removed from the resulting precipitate by treatment with HNEt2 followed by extraction with CH2Cl2. Coarse crystalline SP(NH2)3 is obtained after recrystallization from dry methanol. The crystal structure of SP(NH2)3 has been determined by single crystal X-ray methods (Pbca; a = 922.3(1), b = 953.8(1), c = 1058.4(2) pm, Z = 8). In the crystals the molecules show non-crystallographic point symmetry C8. The P—S bond (195.4(1) pm) is slightly longer than in SPCl3. From P—N bond lengths of about 166 pm a significant electrostatic strengthening of the P—N single bonds is assumed. Weak intermolecular hydrogen bonding interactions (N —H · · · N ≥ 329.5 pm; N — H · · · S ≥ 348.3 pm) are observed.Investigation of thermal properties shows a melting temperature of 115°C for SP(NH2)3. According to combined DTA/TG and MS investigations above this temperature the compound decomposes by evolution of H2S and NH3 to yield amorphous phosphorus(V)nitride.

ChemInform Abstract: Electrical and Thermal Properties of NH4BrxCl1-x Single Crystal.

ChemInform ◽  
1989 ◽  
Vol 20 (25) ◽  
Author(s):  
F. EL-KABBANY ◽  
M. TOSSON ◽  
S. TAHA
Keyword(s):  
Thermal Properties ◽  
Single Crystal
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