Effects of wavefront aberrations of lens on the optical simulator for free-space laser long-distance propagation

2006 ◽  
Author(s):  
Lingyu Wan ◽  
Liren Liu ◽  
Jianfeng Sun
Keyword(s):  
Free Space ◽  
Long Distance ◽  
Wavefront Aberrations ◽  
Distance Propagation

scholarly journals Acoustic Bessel Vortex Beam by Quasi-Three-Dimensional Reflected Metasurfaces

Micromachines ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1388
Author(s):  
Yin Wang ◽  
Jiao Qian ◽  
Jian-Ping Xia ◽  
Yong Ge ◽  
Shou-Qi Yuan ◽  
...  
Keyword(s):  
Free Space ◽  
High Performance ◽  
Three Dimensional ◽  
Propagation Distance ◽  
Vortex Beam ◽  
Remote Communication ◽  
Long Distance ◽  
Broad Bandwidth ◽  
Vortex Beams ◽  
Distance Propagation

Vortex beams have a typical characteristic of orbital angular momentum, which provides a new degree of freedom for information processing in remote communication and a form of non-contact manipulation for trapping particles. In acoustics, vortex beams are generally observed on the surface of a metamaterial structure or in a waveguide with a hard boundary owing to the characteristic of easy diffusion in free space. The realization of an acoustic vortex beam with a long-distance propagation in free space still remains a challenge. To overcome this, we report a type of acoustic Bessel vortex (ABV) beam created by a quasi-three-dimensional reflected metasurface in free space based on phase modulation. By using the Bessel and vortex phase profiles, we can realize an ABV beam with the high performances of both Bessel and vortex beams, and its effective propagation distance is larger than 9.2λ in free space. Beyond that, we discuss the bandwidth and topological charge of the ABV beam in detail, and the fractional bandwidth can reach about 0.28. The proposed ABV beam has the advantages of a high-performance vortex, long-distance propagation, and broad bandwidth, which provide a new pathway for designing multifunctional vortex devices with promising applications.

An optical simulator for free-space laser long-distance propagation

2004 ◽  
Author(s):  
Lingyu Wan ◽  
Liren Liu ◽  
Mingli Zhang ◽  
Zhu Luan ◽  
Shuyun Teng
Keyword(s):  
Free Space ◽  
Long Distance ◽  
Distance Propagation

scholarly journals Long-Distance Free-Space Measurement-Device-Independent Quantum Key Distribution

2020 ◽  
Vol 125 (26) ◽  
Author(s):  
Yuan Cao ◽  
Yu-Huai Li ◽  
Kui-Xing Yang ◽  
Yang-Fan Jiang ◽  
Shuang-Lin Li ◽  
...  
Keyword(s):  
Free Space ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Long Distance ◽  
Measurement Device ◽  
Space Measurement ◽  
Measurement Device Independent

scholarly journals Study the effect of Iraqi weather parameter in FSO communication using different wavelength (650, 532) nm

2018 ◽  
Vol 16 (36) ◽  
pp. 104-112
Author(s):  
Abdullah A. Abdullah
Keyword(s):  
Laser Beam ◽  
Free Space ◽  
Beam Divergence ◽  
Atmospheric Conditions ◽  
Transmitted Power ◽  
Weather Factors ◽  
Long Distance ◽  
Great Idea ◽  
High Bandwidth ◽  
532 Nm

Light has already becomes a popular means of communication, and the high-bandwidth data into free space without the use of wires. A great idea took us to design a new system for transmitting sound through free space at (650, 532) nm wavelengths using reflective mirrors under different atmospheric conditions. The study showed us the effect of various weather factors (temperature, wind speed and humidity) on these wavelengths for different distances. As well as studying the attenuation caused by long-distance laser and beam divergence, A reflective dish was used to focus the spot of the laser beam on the photocell. Results were discussed under the effect of these factors and the attenuation resulting from the beam divergence. Thus, the system performance can be improved for range and the quantity transfer data by increasing transmitted power and reducing the divergence of the laser beam.

Sign in / Sign up

Export Citation Format

Share Document