Results 81 to 90 of about 2,040,617 (301)

Spectral Beam Combining Of 2 Μm Tm Fiber Laser Systems

, 2010
We report spectral beam combining of three 2-μm Tm fiber lasers each locked to slightly different wavelengths, using a new spectral-limiting device, providing a path forward to beam-combining at the multi-kW level.
McComb, Timothy S., Kadwani, Pankaj, Willis, Christina C.C., Andrew Sims, R., Shah, Lawrence   +4 more
core  

Distinct Microstructural Characteristic Lengths Defining Notch Fatigue Crack Initiation and Propagation, and Defect Tolerance in Advanced Steels

Advanced Engineering Materials, EarlyView.
Schematic representation of modes of microcrack nucleation, growth and temporary arrestment at different boundaries, with the criteria for crack propagation in three scenarios: (1) large notch, (2) defect/small sharp notch, and (3) long crack. This work revisits and integrates results on the fatigue behavior of advanced bainitic steels (in particular ...
Lucia Morales‐Rivas
wiley   +1 more source

Ray mapping approach in double freeform surface design for collimated beam shaping

, 2022
Paper 995004, 8 S.Laser beam shaping enables the simultaneous redistribution of the irradiance and phase of a laser beam. The desired shape of the laser beam is thereby determined by the respective application.
Gross, H., Bösel, C.
core   +1 more source

Mid-Wave Infrared Polarization Combiner Based on Reflective Metasurface

Micromachines
Polarization beam combining (PBC) is an important technology for enhancing laser brightness. The conventional bulk polarization beam combiners are Brewster plates and birefringent polarization prisms.
Lulu Yang, Xin Wang, Xuhui Li, Liquan Dong   +3 more
doaj   +1 more source

Simulation analysis of the diode laser spectral beam combining

MATEC Web of Conferences, 2018
For high power diode laser, the multi-wavelength combining is an effective technology of improving the beam brightness. Based on the combing technology, the diode laser bar is described, with the different sample grating in every emitter ridge, which can
Li Jing, Qin Wenbin, Cao Yinhua, Qiu Yuntao, Liu Youqiang, Zeng Xiaodi, Wang Zhiyong   +6 more
doaj   +1 more source

Microstructure Modification of Additively Manufactured Mo–9Si–8B by Annealing and Its Effects on High‐Temperature Mechanical Properties

Advanced Engineering Materials, EarlyView.
Postbuild annealing systematically modifies the phase fractions and morphology of EB‐PBF processed Mo–9Si–8B. Quantitative microstructure–property correlations reveal how controlled phase evolution enhances high‐temperature compressive strength and creep resistance.
Christopher Schmidt, Yong Chen, Georg Hasemann, Benjamin Wahlmann, Carolin Körner, Manja Krüger   +5 more
wiley   +1 more source

Coherent beam combining techniques : an introduction

, 2015
Séminaire, 23 janvier 2015, Leibniz Institut / Ferdinand Braun (Berlin)Introduction on coherent beam combining techniques for laser ...
Lucas-Leclin, Gaëlle
core  

Bessel-Gauss Coherently Combined Beams

Optics Express
The application of a conical wavefront in the near field of the tiled aperture coherent beam combination (CBC) produces a “star-like” Bessel-Gauss irradiance pattern i.e. BG-CBC, in the far field. The properties of such a structured optical field were numerically investigated.
openaire   +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

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