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Observation of positronium diffraction. [PDF]

Nat Commun
Nagata Y, Mikami R, Zafar N, Nagashima Y.   +3 more
europepmc   +1 more source

Development of a Dual Photoacoustic-Ultrasound Imaging System: Current Status and Future Perspectives. [PDF]

Sensors (Basel)
Pham VH, Nguyen Van T.
europepmc   +1 more source

Developments in Nanopatterning of Graphene; Toward Direct Writing. [PDF]

Adv Mater
Abrahamczyk S, Sakreida O, Bachmatiuk A, Martynková GS, Rümmeli MH.   +4 more
europepmc   +1 more source

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Beam quality factor for coherently combined fiber laser beams

Optics & Laser Technology, 2009
Abstract The beam quality factor for a coherently combined beam is studied in detail. A theoretical analysis and a numerical calculation are given to illustrate that the M 2 factor is not a proper means for evaluating the beam quality of a coherently combined beam. The beam propagation factor is introduced to evaluate the beam quality.
Pu Zhou, Zejin Liu, Xiaojun Xu, Zilun Chen, Xiaolin Wang   +4 more
openaire   +3 more sources