Liquid crystal-assisted coherent combining of fiber lasers for mode-tunable orbital angular momentum beam array generation

2020 ◽  
Author(s):  
Jinhu Long ◽  
Tianyue Hou ◽  
Qi Chang ◽  
Hongxiang Chang ◽  
Rongtao Su ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Liquid Crystal ◽  
Orbital Angular Momentum ◽  
Fiber Lasers ◽  
Beam Array ◽  
Array Generation ◽  
Coherent Combining

scholarly journals Liquid crystal spatial-mode converters for the orbital angular momentum of light

2013 ◽  
Vol 15 (2) ◽  
pp. 025406 ◽  
Author(s):  
Sergei Slussarenko ◽  
Bruno Piccirillo ◽  
Vladimir Chigrinov ◽  
Lorenzo Marrucci ◽  
Enrico Santamato
Keyword(s):  
Angular Momentum ◽  
Liquid Crystal ◽  
Orbital Angular Momentum ◽  
Spatial Mode ◽  
Mode Converters

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.

Liquid-crystal-on-silicon-based optical add/drop multiplexer for orbital-angular-momentum-multiplexed optical links

2013 ◽  
Vol 38 (23) ◽  
pp. 5142 ◽  
Author(s):  
Hao Huang ◽  
Yang Yue ◽  
Yan Yan ◽  
Nisar Ahmed ◽  
Yongxiong Ren ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Liquid Crystal ◽  
Orbital Angular Momentum ◽  
Optical Links ◽  
Liquid Crystal On Silicon ◽  
Silicon Based
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