Results 21 to 30 of about 19,361 (300)

Coherent Beam Combination of Ultrafast Fiber Lasers

, 2022
Art. 0902709, 9 S.The performance of fiber laser systems has drastically increased over recent decades, which has opened up new industrial and scientific applications for this technology.
Klenke, A., Stark, H., Müller, M., Kienel, M., Tünnermann, A., Jauregui, C., Limpert, J.   +6 more
core   +1 more source

DOA Estimation of Coherent Signals Based on EPUMA Method With Frequency Beam Scanning Leaky-Wave Antennas

IEEE Access, 2023
A technique to estimate the DOAs of coherent sources using a passive frequency beam scanning leaky-wave antenna (FBS-LWA) with a subspace based method is presented.
Diyuan Xu, Yide Wang, Julien Sarrazin, Biyun Ma, Qingqing Zhu   +4 more
doaj   +1 more source

Volume Bragg grating external cavities for the passive phase locking of high-brightness diode laser arrays : theoretical and experimental study [PDF]

, 2011
We describe the theoretical modeling of the external-cavity operation of a phase-locked array of diode lasers in two configurations, the self-imaging cavity based on the Talbot effect and the angular-filtering cavity. Complex filtering functions, such as
Jun Lim, Larkins, Eric, Gaëlle Lucas-Leclin, Jensen, Ole Bjarlin, Thestrup, Birgitte, Thestrup Nielsen, Birgitte, Birgitte Thestrup, Deepak Vijayakumar, Sujecki, Slawomir, Georges, Patrick, Eric Larkins, David Pabœuf, Ole Bjarlin Jensen, Paboeuf, David, Patrick Georges, Slawomir Sujecki, Thestrup, Birgit, Lim, Jun, Vijayakumar, Deepak, Lucas-Leclin, Gaëlle   +19 more
core   +1 more source

Observation of the Rotational Doppler Effect With Structured Beams in Atomic Vapor

Frontiers in Physics, 2022
A vector beam with the spatial variation polarization has attracted keen interest and is progressively applied in quantum information, quantum communication, precision measurement, and so on.
Shuwei Qiu, Jinwen Wang, Xin Yang, Mingtao Cao, Shougang Zhang, Hong Gao, Fuli Li   +6 more
doaj   +1 more source

Resonant spin Hall effect of light in random photonic arrays

SciPost Physics, 2023
It has been recently shown that the coherent component of light propagating in transversally disordered media, the so-called coherent mode, exhibits an optical spin Hall effect (SHE).
Federico Carlini, Nicolas Cherroret
doaj   +1 more source

Topology-enabled highly efficient beam combination

, 2022
Beam combination with high efficiency is desirable to overcome the power limit of single electromagnetic sources, enabling long-distance optical communication and high-power laser.
Yu Yu (49054), Nuo Chen (8647611), Wei Yan (4327), Songgang Cai (14362503), Jiejun Su (14362506), Weihan Long (14362509), Yucong Yang (9405737), Yuhao Jing (14362500), Yuntian Chen (6814145), Lei Bi (1944472)   +9 more
core   +1 more source

Compact integration of coherent beam combination for high power femtosecond fiber laser systems

, 2022
Paper JTu2A.21We present a new scheme for the implementation of coherent beam combination for power scaling of femtosecond fiber amplifiers.
Klenke, A., Stark, H., Müller, M., Tünnermann, A., Limpert, J.   +4 more
core   +1 more source

Average and statistical properties of coherent radiation from steady-state microbunching

Journal of Synchrotron Radiation, 2023
A promising accelerator light source mechanism called steady-state microbunching (SSMB) is being actively studied. With the combination of strong coherent radiation from microbunching and high repetition rate of a storage ring, high-average-power narrow ...
X. J. Deng, Y. Zhang, Z. L. Pan, Z. Z. Li, J. H. Bian, C.-Y. Tsai, R. K. Li, A. W. Chao, W. H. Huang, C. X. Tang   +9 more
doaj   +1 more source

Effect of beam profile and partial coherence on coherent beam combining performance

Optics Communications, 2019
Abstract A numerical model of a coherent beam composed of a two-dimensional array of laser beams was developed; the model enables analysis of random phase mismatch in the combined system, as well as analysis of the influence of atmospheric turbulence.
Jan K. Jabczynski, Przemyslaw Gontar
openaire   +1 more source

Theory of AdaDelSPGD Algorithm in Fiber Laser-Phased Array Multiplex Communication Systems

Applied Sciences, 2022
Stochastic parallel gradient descent (SPGD) algorithm is one of the most promising methods for effective coherent beam combination. However, the algorithm also has some disadvantages, such as slow convergence speed and local extremum. This paper proposes
Jiayu Chen, Jinsheng Liu, Long Han, Mingru Ci, Dongbo Che, Lihong Guo, Hongjun Yu   +6 more
doaj   +1 more source