Results 61 to 70 of about 2,314,871 (292)

EFFECT OF PUMPING TYPES ON OPTICAL PATH DIFFERENCE IN ND:YAG LASER ROD

Diyala Journal of Engineering Sciences, 2010
The finite element method has been used successfully to determine the temperature distribution throughout Nd:YAG laser rod subjected to one end power pumping cooled by water from the longitudinal side.
Zahraa Mohamed Ali Kamil
doaj  

Quasi-Stationary States in Ionic Liquid-Liquid Crystal Mixtures at the Nematic-Isotropic Phase Transition

Frontiers in Physics, 2020
An open system is a system driven away from equilibrium by a source that supplies an inflow of energy and a sink to maintain an outflow. A typical example of an open system is a system close to its phase transition temperature under irradiation by a ...
Alokmay Datta, Kenichi Yoshikawa, Kenichi Yoshikawa, Yukihiro Yoshida, Gunzi Saito   +4 more
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Observations of artificial and natural optical emissions at the HAARP facility [PDF]

, 2008
Extensive optical observations have been carried out at the High Frequency Active Auroral Research Program (HAARP) ionospheric heating facility since it began operations in 1999.
T. Pedersen, Kendall, E., Esposito, R., Marshall, R., Kosch, M., Pedersen, T., R. Esposito, Mishin, E., R. Marshall, D. Sentman, E. Kendall, M. Kosch, Sentman, D., E. Mishin   +13 more
core   +2 more sources

Investigating the Effect of Inclination Angle and the Influence of Scan Parameters on the Appearance and Thermal and Mechanical Properties of Filigree Tension Rods of LPBF‐Manufactured NiTi Shape‐Memory Alloys

Advanced Engineering Materials, EarlyView.
This article investigates the dependence of the properties on the manufacturing orientation in the form of the inclination angle to the build plate of LPBF‐fabricated NiTi rods with a diameter of 150–220 µm. Metallographic, chemical, thermal, and mechanical characterization show behavior under identical manufacturing conditions that ranges from ...
Sandra Herzig, Michael Werner, Christian Rotsch   +2 more
wiley   +1 more source

All-Optical Broadband QDs Semiconductor Optical Amplifier (QDs-SOA): Inhomogeneous Broadening

IEEE Access
The escalating demand for increased traffic capacity and bandwidth in communication networks has spurred the exploration of innovative solutions. This article delves into the promising features of Quantum Dot Semiconductor Optical Amplifiers (QD-SOAs ...
Mahdiyeh Eyvazi, Reza Yadipour, Ali Rostami   +2 more
doaj   +1 more source

Adaptive Foam 3D Printing of Ultralight and Multifunctional Materials

Advanced Engineering Materials, EarlyView.
Adaptive foam 3D printing, enabled by expandable microspheres, imparts cellular structures to thermoplastic and thermosetting polymers, manufactured through a variety of processes including fused filament fabrication, direct ink writing, digital light processing, and inkjet printing.
Nariman Rajabifar, Amir Ameli
wiley   +1 more source

Optical spin pumping in silicon

Physical Review Research
The optical generation of an out-of-equilibrium spin population is a keystone process for quantum technologies and spintronics alike. Although this is an established technique for studying direct band-gap semiconductors, it has been proven limited in ...
Stefano Achilli, Damiano Marian, Mario Lodari, Luca Moreschini, Emiliano Bonera, Giordano Scappucci, Jacopo Pedrini, Michele Virgilio, Fabio Pezzoli   +8 more
doaj   +1 more source

Optical tuning of vertical-cavity surface-emitting laser side-pumped neodymium-doped yttrium aluminum garnet laser cavity

High Power Laser Science and Engineering
High-power 808 nm vertical-cavity surface-emitting laser (VCSEL) chips have unique characteristics for neodymium-doped yttrium aluminum garnet (Nd:YAG) laser pumping compared with conventional edge-emitting laser bars, including a chip surface with high ...
Yang Li, Chuanchuan Li, Xiaolang Qiu, Chongxian Yuan, Yongli Wang, Xin Wei, Lianghui Chen   +6 more
doaj   +1 more source

Comparative Study of Thermal Lens Effect in End Pulsed-Pumped Ceramics and Single Crystal Yb3+ YAG- Cr4+ YAG Passively Q-switched Microchip Laser. [PDF]

Journal of Bioscience and Applied Research, 2016
In this work, different thermal lens focal lengths with different pumping repetition rates for ceramic and single crystal Yb:YAGare calculated for controlling the thermal focal length without using additional optical elements .
Y. S. Nada, S. M. A. Maize
doaj   +1 more source