Beyond the Marechal criterion: the path toward perfect coherent beam (Conference Presentation)

2019 ◽  
Author(s):  
Daniele Cocco
Keyword(s):  
Coherent Beam

scholarly journals Independently Controlling Stochastic Field Realization Magnitude and Phase Statistics for the Construction of Novel Partially Coherent Sources

Photonics ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 60
Author(s):  
Milo W. Hyde
Keyword(s):  
Coherent Beam ◽  
Optical Field ◽  
Stochastic Field ◽  
Partially Coherent ◽  
Second Moments ◽  
Coherent Beams ◽  
Gaussian Statistics ◽  
Simulated Field ◽  
Gaussian Moment ◽  
Partially Coherent Beams

In this paper, we present a method to independently control the field and irradiance statistics of a partially coherent beam. Prior techniques focus on generating optical field realizations whose ensemble-averaged autocorrelation matches a specified second-order field moment known as the cross-spectral density (CSD) function. Since optical field realizations are assumed to obey Gaussian statistics, these methods do not consider the irradiance moments, as they, by the Gaussian moment theorem, are completely determined by the field’s first and second moments. Our work, by including control over the irradiance statistics (in addition to the CSD function), expands existing synthesis approaches and allows for the design, modeling, and simulation of new partially coherent beams, whose underlying field realizations are not Gaussian distributed. We start with our model for a random optical field realization and then derive expressions relating the ensemble moments of our fields to those of the desired partially coherent beam. We describe in detail how to generate random optical field realizations with the proper statistics. We lastly generate two example partially coherent beams using our method and compare the simulated field and irradiance moments theory to validate our technique.

7.1 kW coherent beam combining system based on a seven-channel fiber amplifier array

2021 ◽  
Vol 140 ◽  
pp. 107016 ◽  
Author(s):  
Pengfei Ma ◽  
Hongxiang Chang ◽  
Yanxing Ma ◽  
Rongtao Su ◽  
Yunfeng Qi ◽  
...  
Keyword(s):  
Fiber Amplifier ◽  
Coherent Beam ◽  
Coherent Beam Combining ◽  
Beam Combining

Shaping the beam profile of a partially coherent beam by a phase aperture

2011 ◽  
Vol 284 (18) ◽  
pp. 4129-4135 ◽  
Author(s):  
Gaofeng Wu ◽  
Yangjian Cai ◽  
Jun Chen
Keyword(s):  
Coherent Beam ◽  
Beam Profile ◽  
Partially Coherent

High-precision active synchronization control of high-power, tiled-aperture coherent beam combining

2017 ◽  
Vol 42 (19) ◽  
pp. 3960 ◽  
Author(s):  
Chun Peng ◽  
Xiaoyan Liang ◽  
Renqi Liu ◽  
Wenqi Li ◽  
Ruxin Li
Keyword(s):  
High Precision ◽  
High Power ◽  
Coherent Beam ◽  
Synchronization Control ◽  
Coherent Beam Combining ◽  
Beam Combining

scholarly journals A phase-error prediction method for coherent beam combining via convolutional neural network

Optik ◽  
2021 ◽  
pp. 167827
Author(s):  
Haolong Jia ◽  
Jing Zuo ◽  
Qiliang Bao ◽  
Chao Geng ◽  
Xinyang Li ◽  
...  
Keyword(s):  
Neural Network ◽  
Convolutional Neural Network ◽  
Phase Error ◽  
Prediction Method ◽  
Coherent Beam ◽  
Error Prediction ◽  
Coherent Beam Combining ◽  
Beam Combining

Mutual injection locking and coherent beam combining of two thulium doped fiber lasers

Laser Physics ◽  
2010 ◽  
Vol 21 (1) ◽  
pp. 172-175 ◽  
Author(s):  
P. Zhou ◽  
X. L. Wang ◽  
Y. X. Ma ◽  
K. Han ◽  
Z. J. Liu
Keyword(s):  
Fiber Lasers ◽  
Coherent Beam ◽  
Injection Locking ◽  
Coherent Beam Combining ◽  
Beam Combining ◽  
Mutual Injection Locking

All-fiber phase actuator based on an erbium-doped fiber amplifier for coherent beam combining at 1064 nm

2011 ◽  
Vol 36 (4) ◽  
pp. 448 ◽  
Author(s):  
Henrik Tünnermann ◽  
Jörg Neumann ◽  
Dietmar Kracht ◽  
Peter Weßels
Keyword(s):  
Fiber Amplifier ◽  
Coherent Beam ◽  
Erbium Doped Fiber Amplifier ◽  
Coherent Beam Combining ◽  
Beam Combining ◽  
Erbium Doped
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