Method for exploring the topological charge and shape of an optical vortex generated by a spiral phase plate

2021 ◽  
Vol 141 ◽  
pp. 107098
Author(s):  
Oana-Valeria Grigore ◽  
Alexandru Craciun
Keyword(s):  
Topological Charge ◽  
Optical Vortex ◽  
Phase Plate ◽  
Spiral Phase Plate ◽  
Spiral Phase

scholarly journals Direct observation of the topological charge of a terahertz vortex beam generated by a Tsurupica spiral phase plate

2014 ◽  
Vol 104 (26) ◽  
pp. 261104 ◽  
Author(s):  
K. Miyamoto ◽  
K. Suizu ◽  
T. Akiba ◽  
T. Omatsu
Keyword(s):  
Direct Observation ◽  
Topological Charge ◽  
Phase Plate ◽  
Vortex Beam ◽  
Spiral Phase Plate ◽  
Spiral Phase

A modified multiplexed vortex helico-conical petal-like zone plate

2021 ◽  
Author(s):  
Tian Xia ◽  
Shubo Cheng ◽  
Wenke Xie ◽  
Shaohua Tao
Keyword(s):  
Topological Charge ◽  
Zone Plate ◽  
Absolute Difference ◽  
Phase Plate ◽  
Rotation Direction ◽  
Clockwise Direction ◽  
Spiral Phase Plate ◽  
The Absolute ◽  
L1 And L2 ◽  
Spiral Phase

Abstract A modified multiplexed vortex helico-conical petal-like zone plate (MMVHPZP) is proposed to generate a polygon-like beam or light-arm beam with an adjustable opening. The MMVHPZP consists of the modified helico-conical petal-like zone plate (MHPZP) with the topological charge l and exponent n, and the multiplexed vortex spiral phase plate (MVSPP) with the inner topological charge l1 and outer topological charge l2. Moreover, when l1 is equal or unequal to l2, the MMVHPZP has the adjustable polygon-like beam or light-arm beam, respectively. In addition, when n is small or large, the number of arms is equal to the absolute difference between l1 and l2 or the sum of one and the absolute difference between l1 and l2, respectively. Furthermore, for the different l1 or l2, the opening is constant. With the increase of the n or l, the opening is larger. When l1 is greater or less than l2, the rotation direction of arms is the anticlockwise or clockwise direction, respectively.

scholarly journals Off-Axis Vortex Beam Propagation through Classical Optical System in Terms of Kummer Confluent Hypergeometric Function

Photonics ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 60
Author(s):  
Ireneusz Augustyniak ◽  
Weronika Lamperska ◽  
Jan Masajada ◽  
Łukasz Płociniczak ◽  
Agnieszka Popiołek-Masajada
Keyword(s):  
Laser Beam ◽  
Gaussian Beam ◽  
Image Plane ◽  
Optical Vortex ◽  
Confluent Hypergeometric Function ◽  
Higher Order ◽  
Phase Plate ◽  
Axis Position ◽  
Spiral Phase Plate ◽  
Spiral Phase

The analytical solution for the propagation of the laser beam with optical vortex through the system of lenses is presented. The optical vortex is introduced into the laser beam (described as Gaussian beam) by spiral phase plate. The solution is general as it holds for the optical vortex of any integer topological charge, the off-axis position of the spiral phase plate and any number of lenses. Some intriguing conclusions are discussed. The higher order vortices are unstable and split under small phase or amplitude disturbance. Nevertheless, we have shown that off-axis higher order vortices are stable during the propagation through the set of lenses described in paraxial approximation, which is untypical behavior. The vortex trajectory registered at image plane due to spiral phase plate shift behaves like a rigid body. We have introduced a new factor which in our beam plays the same role as Gouy phase in pure Gaussian beam.

A Spiral Phase Plate for an Optical Vortices Generation

2018 ◽  
pp. 1-43 ◽  
Author(s):  
V. V. Kotlyar ◽  
A. A. Kovalev ◽  
A. P. Porfirev
Keyword(s):  
Optical Vortices ◽  
Phase Plate ◽  
Spiral Phase Plate ◽  
Spiral Phase

Influences of Spiral Phase Plate′s Parameters on Spiral Phase Contrast Microscopy

2012 ◽  
Vol 32 (4) ◽  
pp. 0411002
Author(s):  
王炯 Wang Jiong ◽  
张雨东 Zhang Yudong ◽  
李国俊 Li Guojun ◽  
罗先刚 Luo Xiangang ◽  
张小军 Zhang Xiaojun ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Phase Plate ◽  
Phase Contrast Microscopy ◽  
Contrast Microscopy ◽  
S Parameters ◽  
Spiral Phase Plate ◽  
Spiral Phase
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