Results 41 to 50 of about 107,506 (333)

Novel Multiple-Image Encryption Scheme Based on Coherent Beam Combining and Equal Modulus Decomposition

Applied Sciences, 2021
In our research, we propose a novel asymmetric multiple-image encryption method using a conjugate Dammann grating (CDG), which is based on the coherent beam combining (CBC) principle.
Wei Li, Aimin Yan, Hongbo Zhang
doaj   +1 more source

From attosecond to zeptosecond coherent control of free-electron wave functions using semi-infinite light fields [PDF]

, 2017
Light-electron interaction in empty space is the seminal ingredient for free-electron lasers and also for controlling electron beams to dynamically investigate materials and molecules. Pushing the coherent control of free electrons by light to unexplored
Barwick, B., Berruto, G., Carbone, F., de Abajo, F. Javier Garcia, Kaminer, I., Lamb, R. J., Madan, I., McGrouther, D., Pomarico, E., Vanacore, G. M., Wang, K.   +10 more
core   +3 more sources

Extending the Photon Energy Coverage of a Seeded Free-Electron Laser via Reverse Taper Enhanced Harmonic Cascade

Photonics, 2021
External seeded free-electron lasers (FELs) hold promising prospects for producing intense coherent radiation at high harmonics of a conventional laser.
Kaiqing Zhang, Tao Liu, Zheng Qi, Xiaoxi Fu, Chao Feng, Haixiao Deng, Bo Liu   +6 more
doaj   +1 more source

Coherent beam combining with an ultrafast multicore Yb-doped fiber amplifier [PDF]

, 2015
International audienceActive coherent beam combination using a 7-non-coupled core,polarization maintaining, air-clad, Yb-doped fiber is demonstrated as amonolithic and compact power-scaling concept for ultrafast fiber lasers.
Barthélémy, Alain, Bouazaoui, Mohamed, Bouwmans, Géraud, Delplace, Karen, Desfarges-Berthelemot, Agnès, Druon, Frédéric, El Hamzaoui, Hicham, Georges, Patrick, Guichard, Florent, Hanna, Marc, Kermène, Vincent, Labat, Damien, Lombard, Laurent, Pouysegur, Julien, Prévost, Florian, Ramirez, Patricia, Rigaud, Philippe, Zaouter, Yoann   +17 more
core   +2 more sources

Multi-plane light conversion coherent beam combining

High Power Laser Science and Engineering
Multi-plane light conversion (MPLC) is a versatile technique that enables arbitrary manipulation of optical fields, and is numerically investigated as a novel avenue for coherent beam combining (CBC) applications.
Hongbing Zhou, Yuefang Yan, Chenxu Liu, Xi Feng, Yu Qin, Min Li, Rumao Tao, Honghuan Lin, Zhitao Peng, Jianjun Wang, Lixin Yan, Feng Jing   +11 more
doaj   +1 more source

Hybrid Beamforming via the Kronecker Decomposition for the Millimeter-Wave Massive MIMO Systems [PDF]

, 2017
Despite its promising performance gain, the realization of mmWave massive MIMO still faces several practical challenges. In particular, implementing massive MIMO in the digital domain requires hundreds of RF chains matching the number of antennas ...
Huang, Kaibin, Lau, Vincent K. N., Li, Xiaofan, Xia, Bin, Zhang, Sha, Zhu, Guangxu   +5 more
core   +3 more sources

Coherent combining of large-aperture high-energy Nd:glass laser amplifiers

High Power Laser Science and Engineering
We present coherent beam combining of nanosecond pulses with 20-J energy and large beams using a Sagnac interferometer geometry based on Nd:glass rod-type amplifiers.
Pierre Lebegue, Joanna De Sousa, Cyril Rapenau, Doina Badarau, Jordan Andrieu, Patrick Audebert, Frédéric Druon, Dimitrios Papadopoulos   +7 more
doaj   +1 more source

Machine learning phase control of filled-aperture coherent beam combining: principle and numerical demonstration

High Power Laser Science and Engineering
Machine learning has already shown promising potential in tiled-aperture coherent beam combining (CBC) to achieve versatile advanced applications. By sampling the spatially separated laser array before the combiner and detuning the optical path delays ...
Hongbing Zhou, Rumao Tao, Xi Feng, Haoyu Zhang, Min Li, Xiong Xin, Yuyang Peng, Honghuan Lin, Jianjun Wang, Lixin Yan, Feng Jing   +10 more
doaj   +1 more source

Combining high pressure and coherent diffraction: a first feasibility test

, 2009
We present a first experiment combining high pression and coherent X-ray diffraction. By using a dedicated diamond anvil cell, we show that the degree of coherence of the X-ray beam is preserved when the X-ray beam passes through the diamond cell.
Bolloc'h, D. Le, Itié, J. P., Polian, A., Ravy, S.   +3 more
core   +1 more source

Coherent beam combining of optical vortices

Optics Letters
We experimentally demonstrate the power scaling of optical vortices using the coherent beam combining technique, encompassing topological charges ranging from ℓ = 1 to ℓ = 5 realized on the basis of a Yb-doped fiber short-pulsed laser system. The combining efficiency varies from 83.2 to 96.9% depending on the topological charge and beam pattern quality
Hossein Fathi, Mikko Närhi, Rafael Barros, Regina Gumenyuk   +3 more
openaire   +3 more sources