Results 41 to 50 of about 3,569,129 (292)
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 +6 more
doaj +1 more source
Optical Angular Momentum Beam Generation Using Coherent Beam Combination
Photonics(1) Background: The significant progress observed over the last two decades in coherent beam combining (CBC) technology has mainly focused on its applications in high-energy physics and laser weapons.
Przemyslaw Gontar +3 more
doaj +1 more source
Lagrangian measurements of turbulent dissipation over a shallow tidal flat from pulse coherent Acoustic Doppler Profilers [PDF]
, 2012 We present high resolution (25 mm spatial, 8 Hz temporal) profiles of velocity measured over a shallow tidal flat using pulse-coherent Acoustic Doppler Profilers mounted on surface drifters.
Mullarney, Julia C. +3 more
core +1 more source
Simulation of incoherent ion effects in electron storage rings
Physical Review Accelerators and Beams, 2021 Ion trapping occurs when a negatively charged beam ionizes residual gas inside an accelerator vacuum chamber, and the resulting ions become trapped in the beam potential.
J. Calvey, M. Borland
doaj +1 more source
Phase identification and bespoke beam shaping for coherent beam combination via deep learning
, 2022 Practical application of coherent beam combination of multiple fibres necessitates phase identification and optimisation in real-time. Here, we solve this mathematical challenge via deep learning, and hence demonstrate the potential for real-time bespoke
Praeger, Matthew +5 more
core +1 more source
Echo-enabled harmonic generation free electron laser
Physical Review Special Topics. Accelerators and Beams, 2009 In this paper, we systematically study the echo-enabled harmonic generation (EEHG) free electron laser (FEL). The EEHG FEL uses two modulators in combination with two dispersion sections that allow one to generate in the beam a high harmonic density ...
Dao Xiang, Gennady Stupakov
doaj +1 more source
Mode attraction, rejection and control in nonlinear multimode optics
Nature Communications, 2023 Novel fundamental notions helping in the interpretation of the complex dynamics of nonlinear systems are essential to our understanding and ability to exploit them.
Kunhao Ji +5 more
doaj +1 more source
IEEE Photonics Journal, 2021 Coherent beam combination of fiber laser phased array is a promising technique to achieve high-brightness laser output. In this paper, we focus on central-lobe energy enhancement of the combined beam in the far-field by theoretically and experimentally ...
Jing Zuo +11 more
doaj +1 more source
IEEE Photonics Journal, 2018 Adaptive fiber-optics collimator (AFOC) plays an important role in the coherent beam combining (CBC) systems. To improve the control bandwidth, the frequency characteristics of AFOC are measured, and an accurate transfer function model is established ...
Guan Huang +4 more
doaj +1 more source
Raman‐based label‐free microscopic analysis of the pancreas in living zebrafish larvae
FEBS Open Bio, EarlyView.Forward stimulated Raman scattering (F‐SRS) and epi coherent anti‐Stokes Raman scattering (E‐CARS) allow label‐free discrimination of distinct subcellular structures in the pancreas of living zebrafish larvae. Given the straightforward applicability, we anticipate broad implementation of Raman microscopy in other organs and across various biomedical ...
Noura Faraj +3 more
wiley +1 more source