Recent Progress in Long-Wavelength Lightwave Devices

1987 ◽  
Author(s):  
Paul W. Shumate
Keyword(s):  
Recent Progress ◽  
Long Wavelength

III–V strained layer supperlattices for long‐wavelength detector applications: Recent progress

1987 ◽  
Vol 5 (5) ◽  
pp. 3150-3152 ◽  
Author(s):  
G. C. Osbourn ◽  
L. R. Dawson ◽  
R. M. Biefeld ◽  
T. E. Zipperian ◽  
I. J. Fritz ◽  
...  
Keyword(s):  
Recent Progress ◽  
Strained Layer ◽  
Long Wavelength ◽  
Wavelength Detector

Recent Progress of Long Wavelength VCSEL Research

2001 ◽  
Author(s):  
Markus Ortsiefer ◽  
Markus-Christian Amann
Keyword(s):  
Recent Progress ◽  
Long Wavelength

scholarly journals Progress in direct-drive fusion studies for the Laser Mégajoule

2004 ◽  
Vol 22 (2) ◽  
pp. 109-114 ◽  
Author(s):  
B. CANAUD ◽  
X. FORTIN ◽  
F. GARAUDE ◽  
C. MEYER ◽  
F. PHILIPPE
Keyword(s):  
Recent Progress ◽  
Coupling Efficiency ◽  
Direct Drive ◽  
Time Analysis ◽  
Laser Target ◽  
Long Wavelength ◽  
Laser Driver ◽  
Indirect Drive ◽  
Ice Shell ◽  
Target Design

In the context of the French Laser Mégajoule (LMJ) fusion research program, direct drive is an alternate to indirect drive to reach ignition and thermonuclear burn. We present recent progress in the direct-drive fusion studies for LMJ. Calculations have shown that the LMJ irradiation uniformity is characterized by long wavelength asymmetries compatible with direct drive requirements. Calculations of the irradiation uniformity in the context of indirect drive beam positioning have been done. We show that non-uniformity can be minimized by repointing the beams. Unfortunately, a time analysis shows that this nonuniformity increases strongly in time above levels usually considered inconsistent for direct drive. Finally, a recent baseline target design is presented and consists of a DT ice shell surrounded by a low-density CH foam wicked with cryogenic DT. This design can potentially reach a gain of 90 with a 1-MJ on-target laser driver. Hydrodynamic stability is increased at the ablation front and the laser–target coupling efficiency achieves 85%.

Recent Research Progress of Long-wavelength Emitting Long-persistent Luminescence Materials

2014 ◽  
Vol 1592 ◽  
Author(s):  
Wei Zeng ◽  
Yuhua Wang ◽  
Yanqin Li ◽  
Xuhui Xu
Keyword(s):  
Recent Progress ◽  
Uv Light ◽  
Research Progress ◽  
Intensity Level ◽  
Persistent Luminescence ◽  
Long Wavelength ◽  
Afterglow Time ◽  
Vacuum Atmosphere ◽  
Optimum Doping Concentration ◽  
Initial Intensity

AbstractBlue and Green long-persistent luminescence materials have been fully developed, and are well featured in production and application. However, long-wavelength emitting materials are very rare relatively. This paper presents some work from our laboratory on the recent progress in long-wavelength emitting long-persistent luminescence materials: Sr3Al2O5Cl2: Eu2+, Tm3+, Sr2SnO4: Sm3+ and Ca2BO3Cl: Eu2+, Dy3+. The initial intensity of Sr3Al2O5Cl2: Eu2+, Tm3+ can reach nearly 5000 mcd/m2 and its afterglow can last about 220 min at recognizable intensity level. Sr2SnO4: Sm3+ has a red emission and its afterglow time of which sintered in vacuum atmosphere increased substantially. With optimum doping concentration and sufficient excitation with UV light, the yellow afterglow of Ca2BO3Cl: Eu2+, Dy3+ can persist over 48 h.

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