Phase retrieval of high-power gyrotron orbital angular momentum beams

2017 ◽  
Author(s):  
Ashwini Sawant ◽  
Dongho Yu ◽  
Dongsung Kim ◽  
Mun Seok Choe ◽  
EunMi Choi
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
High Power ◽  
Phase Retrieval

scholarly journals Measuring the orbital angular momentum of high-power laser pulses

2020 ◽  
Vol 27 (5) ◽  
pp. 053107
Author(s):  
R. Aboushelbaya ◽  
K. Glize ◽  
A. F. Savin ◽  
M. Mayr ◽  
B. Spiers ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
High Power ◽  
Laser Pulses ◽  
High Power Laser ◽  
Power Laser

scholarly journals Comprehensive investigation on producing high-power orbital angular momentum beams by coherent combining technology

2019 ◽  
Vol 7 ◽  
Author(s):  
Dong Zhi ◽  
Tianyue Hou ◽  
Pengfei Ma ◽  
Yanxing Ma ◽  
Pu Zhou ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
High Power ◽  
Free Space ◽  
Phase Array ◽  
Free Space Optical ◽  
Long Distance ◽  
Potential Wells ◽  
Beam Combination ◽  
Beam Array

High-power orbital angular momentum (OAM) beams have distinct advantages in improving capacity and data receiving for free-space optical communication systems at long distances. Utilizing the coherent combination of a beam array technique and helical phase approximation by a piston phase array, we have proposed a generating system for a novel high-power beam carrying OAM, which could overcome the power limitations of a common vortex phase modulator and a single beam. The characteristics of this generating method and the orthogonality of the generated OAM beams with different eigenstates have been theoretically analyzed and verified. Also a high-power OAM beam produced by coherent beam combination (CBC) of a six-element hexagonal fiber amplifier array has been experimentally implemented. Results show that the CBC technique utilized to control the piston phase differences among the array beams has a high efficiency of 96.3%. On the premise of CBC, we have obtained novel vortex beams carrying OAM of $\pm 1$ by applying an additional piston phase array modulation on the corresponding beam array. The experimental results agree approximately with the theoretical analysis. This work could be beneficial to areas that need high-power OAM beams, such as ultra-long distance free-space optical communications, biomedical treatments, and powerful trapping and manipulation under deep potential wells.

scholarly journals High power two-color orbital angular momentum beam generation using vertical external cavity surface emitting lasers

2018 ◽  
Vol 112 (4) ◽  
pp. 041108 ◽  
Author(s):  
Michal L. Lukowski ◽  
Chris Hessenius ◽  
Jason T. Meyer ◽  
Ewan M. Wright ◽  
Mahmoud Fallahi
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
High Power ◽  
External Cavity ◽  
Cavity Surface ◽  
Beam Generation ◽  
Surface Emitting Lasers ◽  
Emitting Lasers

High-power Bessel beams with orbital angular momentum in the terahertz range

2017 ◽  
Vol 96 (2) ◽  
Author(s):  
Yu. Yu. Choporova ◽  
B. A. Knyazev ◽  
G. N. Kulipanov ◽  
V. S. Pavelyev ◽  
M. A. Scheglov ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
High Power ◽  
Terahertz Range ◽  
Bessel Beams
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