scholarly journals Spatially-distributed orbital angular momentum beam array generation based on greedy algorithms and coherent combining technology

2018 ◽  
Vol 26 (12) ◽  
pp. 14945 ◽  
Author(s):  
Tianyue Hou ◽  
Dong Zhi ◽  
Rumao Tao ◽  
Yanxing Ma ◽  
Pu Zhou ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Greedy Algorithms ◽  
Beam Array ◽  
Spatially Distributed ◽  
Array Generation ◽  
Coherent Combining

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.

Advanced Mode Unity Using Loop Antennas Proximate to Reflector for Orbital Angular Momentum Communication

2018 ◽  
Author(s):  
Ryohei Yamagishi ◽  
Hiroto Otsuka ◽  
Ryo Ishikawa ◽  
Akira Saitou ◽  
Hiroshi Suzuki ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Loop Antennas

Highly dispersive coupled ring-core fiber for orbital angular momentum modes

2020 ◽  
Vol 117 (19) ◽  
pp. 191101
Author(s):  
Wenpu Geng ◽  
Yiqiao Li ◽  
Yuxi Fang ◽  
Yingning Wang ◽  
Changjing Bao ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Core Fiber ◽  
Ring Core
Sign in / Sign up

Export Citation Format

Share Document