scholarly journals Nanometric displacement sensor with switchable measuring range using a cylindrical vector beam excited silicon nanoantenna

2021 ◽  
Author(s):  
Hanmou Zhang ◽  
Kun Gao ◽  
lei han ◽  
Sheng Liu ◽  
Ting Mei ◽  
...  
Keyword(s):  
Displacement Sensor ◽  
Measuring Range ◽  
Vector Beam ◽  
Cylindrical Vector Beam

scholarly journals Tight focusing of second-order cylindrical vector beam by Mikaelian lens

2021 ◽  
Vol 1745 ◽  
pp. 012013
Author(s):  
S. S. Stafeev ◽  
E. S. Kozlova ◽  
A. G. Nalimov ◽  
V. V. Kotlyar
Keyword(s):  
Second Order ◽  
Vector Beam ◽  
Tight Focusing ◽  
Cylindrical Vector Beam

An all-fiber laser for cylindrical vector beam

2010 ◽  
Author(s):  
Lixin Xu ◽  
Rui Zheng ◽  
Chun Gu ◽  
Anting Wang ◽  
Hai Ming
Keyword(s):  
Fiber Laser ◽  
Vector Beam ◽  
Cylindrical Vector Beam

scholarly journals Cylindrical vector beam multiplexer/demultiplexer using off-axis polarization control

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Shuqing Chen ◽  
Zhiqiang Xie ◽  
Huapeng Ye ◽  
Xinrou Wang ◽  
Zhenghao Guo ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Transmission Rate ◽  
High Capacity ◽  
Wavelength Division ◽  
Polarization Control ◽  
Vector Beam ◽  
Vector Mode ◽  
Control Technologies ◽  
Polarization Division Multiplexing ◽  
Cylindrical Vector Beam

AbstractThe emergence of cylindrical vector beam (CVB) multiplexing has opened new avenues for high-capacity optical communication. Although several configurations have been developed to couple/separate CVBs, the CVB multiplexer/demultiplexer remains elusive due to lack of effective off-axis polarization control technologies. Here we report a straightforward approach to realize off-axis polarization control for CVB multiplexing/demultiplexing based on a metal–dielectric–metal metasurface. We show that the left- and right-handed circularly polarized (LHCP/RHCP) components of CVBs are independently modulated via spin-to-orbit interactions by the properly designed metasurface, and then simultaneously multiplexed and demultiplexed due to the reversibility of light path and the conservation of vector mode. We also show that the proposed multiplexers/demultiplexers are broadband (from 1310 to 1625 nm) and compatible with wavelength-division-multiplexing. As a proof of concept, we successfully demonstrate a four-channel CVB multiplexing communication, combining wavelength-division-multiplexing and polarization-division-multiplexing with a transmission rate of 1.56 Tbit/s and a bit-error-rate of 10−6 at the receive power of −21.6 dBm. This study paves the way for CVB multiplexing/demultiplexing and may benefit high-capacity CVB communication.

A Large Measuring Range Profilometer for Three-Dimensional Surface Topography Measurement

2007 ◽  
Vol 364-366 ◽  
pp. 750-755 ◽  
Author(s):  
Xu Dong Yang ◽  
Jia Chun Li ◽  
Tie Bang Xie
Keyword(s):  
Surface Topography ◽  
Three Dimensional ◽  
Displacement Sensor ◽  
Resistance Force ◽  
Sampling Point ◽  
Measuring Range ◽  
3D Surface Topography ◽  
Control Circuits ◽  
Industrial Control Computer ◽  
Zero Offset

A novel profilometer for three-dimensional (3D) surface topography measurement is presented. The profilometer has large measuring range, high precision and small measuring touch force. It is composed of a two-dimensional (2D) displacement sensor, a 3D platform based on vertical scanning, measuring and control circuits and an industrial control computer. When a workpiece is measured, the vertical undulation of the profile at a sampling point leads to a zero offset of the 2D displacement sensor. According to the zero offset, a piezoelectric actuator and a servo motor drive the vertical scanning platform to move vertically to ensure that the lever returns to its balance position. So the non-linear error caused by the rotation of the lever is very small even if the measuring range is large. When the stylus barges up against a steep wall, the horizontal resistance force results in another zero offset of the 2D displacement sensor. If the zero offset exceeds a quota, the vertical scanning platform descends to make the stylus climb the steep wall successfully. According to the theoretical and experimental analysis, the profilometer can measure roughness, profile of sphere, step, groove and other 3D surfaces with curvature precisely.

Tungsten disulphide based all fiber Q-switching cylindrical-vector beam generation

2015 ◽  
Vol 107 (19) ◽  
pp. 191108 ◽  
Author(s):  
J. Lin ◽  
K. Yan ◽  
Y. Zhou ◽  
L. X. Xu ◽  
C. Gu ◽  
...  
Keyword(s):  
Beam Generation ◽  
Tungsten Disulphide ◽  
Vector Beam ◽  
Q Switching ◽  
Cylindrical Vector Beam

Convolutional neural network to identify cylindrical vector beam modes

2021 ◽  
pp. 1-1
Author(s):  
Lizhen Chen ◽  
Wenjie Xiong ◽  
Peipei Wang ◽  
Zebin Huang ◽  
Yanliang He ◽  
...  
Keyword(s):  
Neural Network ◽  
Convolutional Neural Network ◽  
Vector Beam ◽  
Cylindrical Vector Beam

Fabrication of Periodic Curved Ripple Structures on Tungsten Surface Using Femtosecond Non-Cylindrical Vector Beam

2019 ◽  
Vol 46 (5) ◽  
pp. 0508023 ◽  
Author(s):  
王婷媛 Wang Tingyuan ◽  
刘伟伟 Liu Weiwei ◽  
张楠 Zhang Nan ◽  
余志强 Yu Zhiqiang ◽  
付璐 Fu Lu ◽  
...  
Keyword(s):  
Vector Beam ◽  
Tungsten Surface ◽  
Cylindrical Vector Beam

Passive Q-switched Cylindrical Vector Beam Fiber Laser Based on Few Mode Fiber

2020 ◽  
Vol 49 (3) ◽  
pp. 314003-314003
Author(s):  
王承鑫 Cheng-xin WANG ◽  
陆宝乐 Bao-le LU ◽  
罗敏 Min LUO ◽  
陈浩伟 Hao-wei CHEN ◽  
白晋涛 Jin-tao BAI
Keyword(s):  
Fiber Laser ◽  
Vector Beam ◽  
Cylindrical Vector Beam

High-Speed Directly Modulated Cylindrical Vector Beam Lasers

ACS Photonics ◽  
2019 ◽  
Vol 6 (12) ◽  
pp. 3261-3270 ◽  
Author(s):  
Xiang Ma ◽  
Shuang Zheng ◽  
Quanan Chen ◽  
Su Tan ◽  
Pengfei Zhang ◽  
...  
Keyword(s):  
High Speed ◽  
Vector Beam ◽  
Cylindrical Vector Beam
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