Doughnut-like beam generation of Laguerre–Gaussian mode with extremely high mode purity

2008 ◽  
Vol 281 (6) ◽  
pp. 1647-1653 ◽  
Author(s):  
Shu-Chun Chu ◽  
Kenju Otsuka
Keyword(s):  
High Mode ◽  
Beam Generation ◽  
Gaussian Mode ◽  
Mode Purity

scholarly journals Evaluation of the Laguerre–Gaussian mode purity produced by three-dimensional-printed microwave spiral phase plates

2020 ◽  
Vol 7 (7) ◽  
pp. 200493
Author(s):  
D. Isakov ◽  
Y. Wu ◽  
B. Allen ◽  
P. S. Grant ◽  
C. J. Stevens ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Electromagnetic Waves ◽  
Three Dimensional ◽  
Direct Fabrication ◽  
Dielectric Lens ◽  
Gaussian Mode ◽  
Phase Plates ◽  
Mode Purity ◽  
Aided Design ◽  
Spiral Phase

Computer-aided design software and additive manufacturing provide flexibility for the direct fabrication of multi-material devices. This design and fabrication versatility has been investigated for the manufacture of dielectric spiral phase plates (SPP) that generate electromagnetic waves with helical wavefronts. Three types of SPPs designed to produce an orbital angular momentum (OAM) mode number l = |1| were additively manufactured using material extrusion and polyjet fabrication methods. The OAM mode characteristics of the transformed helical microwaves as a function of the SPP geometrical features were investigated experimentally in the 12–18 GHz frequency range. The SPPs were further combined with an additively manufactured dielectric lens that provided a marked improvement in OAM mode purity. Finally, multiplexing and de-multiplexing of two OAM modes were demonstrated successfully using an optimum SPP geometry and arrangement.

scholarly journals Ultra-Compact Waveguide-Integrated TE-Mode Converters With High Mode Purity by Designing Ge/Si Patterns

2019 ◽  
Vol 11 (4) ◽  
pp. 1-8 ◽  
Author(s):  
Han Ye ◽  
Fengyi Yu ◽  
Yumin Liu ◽  
Zhongyuan Yu ◽  
Jing Li ◽  
...  
Keyword(s):  
High Mode ◽  
Te Mode ◽  
Mode Converters ◽  
Mode Purity ◽  
Compact Waveguide

HE04 Mode Exciters With Flat Transmission and High Mode Purity for Confocal Gyro-TWAs

2018 ◽  
Vol 65 (6) ◽  
pp. 2340-2346 ◽  
Author(s):  
Yelei Yao ◽  
Jianxun Wang ◽  
Guo Liu ◽  
Hao Li ◽  
Wei Jiang ◽  
...  
Keyword(s):  
High Mode ◽  
Mode Purity

scholarly journals Broadband High-Order OAM Reflective Metasurface With High Mode Purity Using Subwavelength Element and Circular Aperture

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 71963-71971 ◽  
Author(s):  
Zaid Akram ◽  
Xiuping Li ◽  
Zihang Qi ◽  
Abdul Aziz ◽  
Li Yu ◽  
...  
Keyword(s):  
High Order ◽  
High Mode ◽  
Circular Aperture ◽  
Mode Purity

Laguerre-Gaussian mode purity of Gaussian vortex beams

Optik ◽  
2021 ◽  
Vol 230 ◽  
pp. 166320
Author(s):  
Xinjian Pan ◽  
Jieying Wu ◽  
Zhili Li ◽  
Chongfu Zhang ◽  
Chunjian Deng ◽  
...  
Keyword(s):  
Gaussian Mode ◽  
Mode Purity ◽  
Vortex Beams

Inquiry into the Processes of Electron Beam Generation in a Magnetron Gun with Secondary-Emission Cathode

1999 ◽  
Vol 53 (4-5) ◽  
pp. 144-149
Author(s):  
N. I. Ayzatsky ◽  
A. N. Dovbnya ◽  
V. V. Zakutin ◽  
N. G. Reshetnyak ◽  
V. P. Romas'ko ◽  
...  
Keyword(s):  
Electron Beam ◽  
Secondary Emission ◽  
Electron Beam Generation ◽  
Beam Generation ◽  
Emission Cathode
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